阅读说明：本技术 芳香族乙烯基化合物-乙烯基氰化合物聚合物的制备方法和制备装置 (Method and apparatus for producing aromatic vinyl compound-vinyl cyan compound polymer ) 是由 黄贞雅 申大荣 张诚根 周垠廷 李元均 于 2019-08-01 设计创作，主要内容包括：本发明涉及一种芳香族乙烯基化合物-乙烯基氰化合物聚合物的制备方法和制备装置。更具体地,本发明涉及一种芳香族乙烯基化合物-乙烯基氰化合物聚合物的制备方法,包括：使用挥发罐从包含芳香族乙烯基化合物-乙烯基氰化合物聚合物、残留芳香族乙烯基单体、残留乙烯基氰单体和有机溶剂的聚合产物中分离出挥发性组分的步骤；和使用冷凝器冷凝分离出的挥发性组分的步骤,其中,将有机溶剂或芳香族乙烯基单体喷射到正向所述冷凝器传输的挥发性组分上。根据本发明,挥发性组分可以在冷凝器中完全冷凝,从而显著减少未冷凝而排放到外部的挥发性组分的量。因此,可以减少在处理挥发性组分时花费的废水处理成本,并且可以显著减少排放到大气中的对人体有害的乙烯基氰单体的量。(The present invention relates to a method and an apparatus for producing an aromatic vinyl compound-vinyl cyan compound polymer. More specifically, the present invention relates to a method for preparing an aromatic vinyl compound-vinyl cyan compound polymer, comprising: a step of separating a volatile component from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and a step of condensing the separated volatile component using a condenser, wherein an organic solvent or an aromatic vinyl monomer is sprayed onto the volatile component being transported toward the condenser. According to the present invention, the volatile components can be completely condensed in the condenser, thereby significantly reducing the amount of volatile components discharged to the outside without being condensed. Therefore, the cost of wastewater treatment spent in treating volatile components can be reduced, and the amount of vinyl cyanide monomers harmful to human bodies discharged into the atmosphere can be significantly reduced.)

1. A method for preparing an aromatic vinyl compound-vinyl cyan compound polymer, comprising:

separating a volatile component from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and

the separated volatile components are condensed using one condenser or two or more condensers connected in series,

wherein the preparation method comprises the following steps: spraying an organic solvent onto the separated volatile components being transported from the volatilization canister to the condenser; or

When the two or more condensers connected in series are used, the organic solvent or the aromatic vinyl monomer is sprayed onto the volatile components that are not condensed in the first condenser and are being transferred to the second condenser.

2. The production method according to claim 1, wherein the production method comprises: spraying the organic solvent onto the volatile components being transported to the first condenser after separation in the volatilization canister; and

spraying the organic solvent or the aromatic vinyl monomer onto the volatile components that are not condensed in the first condenser and are being transported to the second condenser.

3. The production method according to claim 1, wherein the separated volatile component contains 5 to 35% by weight of a vinyl cyanide compound, 45 to 80% by weight of an aromatic vinyl compound, and 5 to 50% by weight of an organic solvent.

4. The production method according to claim 1, wherein in the injection of the organic solvent, the organic solvent is injected at a flow rate of 10kg/hr to 200 kg/hr.

5. The production method according to claim 1, wherein in the ejection of the organic solvent, the organic solvent is ejected at a temperature of-10 ℃ to 40 ℃.

6. The production method according to claim 1, wherein in the injection of the organic solvent or the aromatic vinyl monomer, the organic solvent or the aromatic vinyl monomer is injected at a flow rate of 10kg/hr to 220 kg/hr.

7. The production method according to claim 1, wherein the organic solvent or the aromatic vinyl monomer is sprayed at a temperature of-10 ℃ to 40 ℃ while the organic solvent or the aromatic vinyl monomer is sprayed onto the volatile component which is not condensed in the first condenser and is being transported to the second condenser.

8. The method of claim 1, wherein the condensing in the first condenser is performed at a refrigerant temperature of 20 ℃ to 35 ℃ and an operating pressure of 3 torr to 100 torr.

9. The method of claim 1, wherein the condensing in the second condenser is performed at a refrigerant temperature of-3 ℃ to 4 ℃ and an operating pressure of 5 torr to 50 torr.

10. The production method according to claim 1, wherein the separation is performed at a temperature of 220 ℃ to 260 ℃ and a pressure of 35 torr or less.

11. The production method according to claim 1, wherein the condensate condensed in the first condenser and the second condenser is recovered, purified, and reintroduced into the reactor.

12. An apparatus for preparing an aromatic vinyl compound-vinyl cyan compound polymer, comprising:

a volatilization pot for separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent; and

a condenser or two or more condensers connected in series for condensing the separated volatile components,

wherein the preparation apparatus comprises: an injection device for injecting an organic solvent into a transfer tube for transporting the separated volatile components to the condenser; or

When two or more condensers connected in series are included, an injection device for injecting an organic solvent or an aromatic vinyl monomer into a transfer pipe for transporting volatile components that have not been condensed in the first condenser to the second condenser.

13. The manufacturing apparatus according to claim 12, wherein the manufacturing apparatus includes: an injection pipe for injecting the organic solvent into a transfer pipe for transporting the separated volatile component to a first condenser; and

an injection pipe for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transferring volatile components that are not condensed in the first condenser to the second condenser.

Technical Field

[ Cross-reference to related applications ]

The present application claims the priority of korean patent application No. 10-2018-.

The present invention relates to a method and an apparatus for producing an aromatic vinyl compound-vinyl cyan compound polymer. More specifically, the present invention relates to a method for preparing an aromatic vinyl compound-vinyl cyan compound polymer, the method comprising: a step of separating a volatile component from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and a step of condensing the separated volatile components using one condenser or two or more condensers connected in series, wherein the production method comprises: a step of spraying an organic solvent onto the separated volatile component transported from the volatilization pot to the condenser; or, when two or more condensers connected in series are used, a step of spraying an organic solvent or an aromatic vinyl monomer onto volatile components which are not condensed in the first condenser and are being transferred to the second condenser, and an apparatus for preparing the aromatic vinyl compound-vinyl cyanide compound polymer. According to the present invention, the amount of residual monomers and organic solvents discharged can be reduced.

Background

In general, aromatic vinyl compound-vinyl cyanide compound polymers have excellent moldability, rigidity and electrical properties, and thus are widely used in various fields including Office Automation (OA) equipment such as computers, printers and copiers, home appliances such as televisions and audio systems, electric and electronic parts and miscellaneous goods. In particular, aromatic vinyl compound-vinyl cyan compound polymers having improved heat resistance have been used for home appliance housings, automobile interior materials, and the like, due to their non-deforming properties at high temperatures.

The aromatic vinyl compound-vinyl cyan compound polymer is obtained by reacting an aromatic vinyl compound and a vinyl cyan compound in an organic solvent. As a result of the reaction, a polymerization product containing an aromatic vinyl compound-vinyl cyan compound polymer is obtained. In this case, the monomers and the organic solvent remain in the polymerization product except for the final product. Therefore, a process of removing the residual monomer and the organic solvent is indispensable.

According to a conventional process for preparing an aromatic vinyl compound-vinyl cyanide compound polymer, polymerization is carried out in a reactor; transferring a polymerization product discharged from the reactor after polymerization to a volatilization tank, and separating volatile components such as residual monomers and organic solvents and the aromatic vinyl compound-vinyl cyanide compound polymer from each other in the volatilization tank; and condensing the separated volatile components using a condenser and purifying to obtain a final product aromatic vinyl compound-vinyl cyanide compound polymer.

Generally, a condensing system consisting of two or three condensers is used. In this case, the condensing efficiency can be improved by increasing the pressure in the condenser and decreasing the temperature of the refrigerant. However, there is a limitation in reducing the temperature of the supplied refrigerant due to installation limitations, resulting in discharge of non-condensed volatile components. In addition, when the amount of vinyl cyanide monomer having a low boiling point is increased, the condensation efficiency is decreased.

The uncondensed volatile components are vented to the stream or to the atmosphere through a wastewater treatment system. In this case, the wastewater treatment results in high cost, and the discharged volatile components cause environmental pollution.

Therefore, in the production of an aromatic vinyl compound-vinyl cyanide compound polymer, in order to reduce the amount of volatile components discharged into the atmosphere or introduced into a wastewater treatment system, a method of producing an aromatic vinyl compound-vinyl cyanide compound polymer using a condenser having improved condensation efficiency is required.

[ related art documents ]

[ patent document ]

(patent document 1) KR 10-2007-0073028A

Disclosure of Invention

Technical problem

Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for preparing an aromatic vinyl compound-vinyl cyan compound polymer, the method comprising: a step of separating a volatile component from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and a step of condensing the separated volatile components using one condenser or two or more condensers connected in series, wherein the production method comprises: a step of spraying an organic solvent onto the separated volatile component being transported from the volatilization canister to the condenser; or, when two or more condensers connected in series are used, a step of spraying an organic solvent or an aromatic vinyl monomer onto volatile components that are not condensed in the first condenser and are being transferred to the second condenser, and an apparatus for preparing the aromatic vinyl compound-vinyl cyanide compound polymer. According to the present invention, the amount of residual monomers and organic solvents discharged can be reduced.

The above and other objects of the present invention can be achieved by the present disclosure described below.

Technical scheme

According to an aspect of the present invention, there is provided a method for preparing an aromatic vinyl compound-vinyl cyan compound polymer, comprising: separating a volatile component from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and condensing the separated volatile components using one condenser or two or more condensers connected in series, wherein the production method comprises: spraying an organic solvent onto said separated volatile component being transported from said volatilization canister to said condenser; alternatively, when two or more condensers connected in series are used, the organic solvent or the aromatic vinyl monomer is sprayed onto the volatile components that are not condensed in the first condenser and are being transported to the second condenser.

According to another aspect of the present invention, there is provided an apparatus for preparing an aromatic vinyl compound-vinyl cyanide compound polymer, comprising: a volatilization pot for separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent; and one condenser or two or more condensers connected in series for condensing the separated volatile components, wherein the production apparatus comprises: an injection device for injecting an organic solvent into a transfer tube for transporting the separated volatile components to a condenser; alternatively, when two or more condensers connected in series are included, an injection device for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transporting the volatile component that is not condensed in the first condenser to the second condenser.

Advantageous effects

According to the present invention, when an aromatic vinyl compound-vinyl cyanide compound polymer is produced, an organic solvent or an aromatic vinyl monomer is sprayed onto a volatile component being transferred to a first condenser or onto a volatile component not condensed in the first condenser and being transferred to a second condenser without changing equipment. By this method, the content of vinyl cyanide monomers having a low boiling point contained in the volatile components can be reduced, thereby improving condensation efficiency. Therefore, the cost of wastewater treatment spent on treating uncondensed volatile components can be reduced, and the amount of volatile components harmful to human bodies discharged into the atmosphere can be significantly reduced.

Drawings

FIG. 1 schematically shows a step of separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyan compound polymer, residual aromatic vinyl monomers and an organic solvent and condensing the separated volatile components according to the present invention;

fig. 2 schematically shows a step of separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyan compound polymer, residual aromatic vinyl monomers and an organic solvent and condensing the separated volatile components according to the prior art.

Detailed Description

Hereinafter, the method for preparing the aromatic vinyl compound-vinyl cyan compound polymer according to the present invention will be described in detail.

When an aromatic vinyl compound-vinyl cyanide compound polymer is produced, volatile components separated from the polymerization product are not completely condensed in the condensation process and discharged to the outside. In this case, waste water treatment costs are incurred and environmental pollution is caused. In order to solve these problems, the present inventors made efforts and as a result confirmed that when an organic solvent or monomer is added to the volatile components being transported to the condenser, the condensation efficiency is increased and the amount of volatile components discharged without being condensed is reduced. Based on these findings, the present inventors continued to study and completed the present invention.

The aromatic vinyl compound-vinyl cyan compound polymer according to the present invention is prepared as follows.

The method for preparing an aromatic vinyl compound-vinyl cyan compound polymer according to the present invention comprises: a step of separating a volatile component from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and a step of condensing the separated volatile components using one condenser or two or more condensers connected in series, wherein the production method comprises: a step of spraying an organic solvent onto the separated volatile component being transported from the volatilization canister to the condenser; alternatively, when two or more condensers connected in series are used, a step of spraying an organic solvent or an aromatic vinyl monomer onto the volatile components which are not condensed in the first condenser and are being transferred to the second condenser. According to the production method of the present invention, the condensation efficiency can be improved, and the amount of volatile components emitted can be significantly reduced.

In the present invention, the first condenser and the second condenser may be any two condensers of two or more condensers connected in series, respectively. In this case, the first condenser may be a first-stage condenser, and the second condenser may be a second-stage condenser.

For example, the method for preparing an aromatic vinyl compound-vinyl cyan compound polymer according to the present invention comprises: a step of separating a volatile component from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent using a volatilization tank; and a step of condensing the separated volatile components using two or more condensers connected in series, wherein the production method comprises: a step of spraying an organic solvent onto the volatile components transferred to the first condenser after being separated from the volatilization pot; alternatively, a step of spraying an organic solvent or an aromatic vinyl monomer onto the volatile components which are not condensed in the first condenser and are being transferred to the second condenser. According to the production method of the present invention, the condensation efficiency can be improved, thereby reducing the amount of volatile components emitted.

For example, the method for preparing the aromatic vinyl compound-vinyl cyan compound polymer according to the present invention may include: a step of spraying an organic solvent onto the volatile components transferred to the first condenser after being separated from the volatilization pot; and a step of spraying an organic solvent or an aromatic vinyl monomer onto the volatile components which are not condensed in the first condenser and are being transferred to the second condenser. In this case, the condensing efficiency can be improved, thereby significantly reducing the amount of volatile components emitted.

For example, the preparation method may include a step of polymerizing an aromatic vinyl compound and a vinyl cyanide compound before the step of separating volatile components.

For example, the aromatic vinyl compound-vinyl cyanide compound polymer may be prepared by polymerizing an aromatic vinyl compound and a vinyl cyanide compound in an organic solvent.

For example, when the polymerization reaction is carried out, one or more selected from the group consisting of an initiator, a molecular weight regulator and an emulsifier may be contained.

For example, the polymerization reaction may be bulk polymerization, solution polymerization or emulsion polymerization, and is preferably bulk polymerization or solution polymerization. In this case, the aromatic vinyl compound-vinyl cyanide compound polymer produced may be excellent in mechanical properties such as tensile strength and impact strength, heat resistance and thermal stability.

In the present invention, the reaction method for obtaining the aromatic vinyl compound-vinyl cyan compound polymer is not particularly limited, and a conventional polymerization method can be used.

For example, the step of separating the volatile components in the volatilization canister can be carried out at a temperature of 220 ℃ to 260 ℃ and a pressure of 35 torr or less, preferably at a temperature of 225 ℃ to 255 ℃ and a pressure of 15 torr to 35 torr. Within the range, the volatile component can be efficiently separated from the aromatic vinyl compound-vinyl cyanide compound polymer.

As the volatilization pot of the present invention, a volatilization pot that is generally used in the field to which the present invention pertains can be used without particular limitation.

For example, the separated volatile component may include 5 to 35% by weight of a vinyl cyanide compound, 45 to 80% by weight of an aromatic vinyl compound, and 5 to 50% by weight of an organic solvent.

As a specific example, the separated volatile component may include 5 to 20% by weight of a vinyl cyanide compound, 45 to 59% by weight of an aromatic vinyl compound, and 25 to 45% by weight of an organic solvent, or may include 15 to 35% by weight of a vinyl cyanide compound, 60 to 80% by weight of an aromatic vinyl compound, and 5 to 25% by weight of an organic solvent.

For example, the aromatic vinyl compound-vinyl cyanide compound polymer passing through the volatilization pot can be transferred to a pelletizer and cut therein. Then, cooling and drying are carried out to obtain a granular aromatic vinyl compound-vinyl cyan compound polymer.

In the present invention, two or more condensers are preferably connected to each other in series, or two condensers may be connected to each other in series. In this case, the condensing efficiency can be improved.

In the present invention, as the condenser of the present invention, a condenser generally used in the field to which the present invention pertains may be used without particular limitation.

For example, in the step of spraying the organic solvent onto the volatile component being transferred to the first condenser after being separated in the volatilization tank, the organic solvent may be sprayed at a flow rate of 10kg/hr to 200kg/hr, 10kg/hr to 150kg/hr, or 15kg/hr to 100kg/hr, preferably 15kg/hr to 90kg/hr, more preferably 20kg/hr to 50 kg/hr. In this case, the content of the residual vinyl cyanide monomer having a low boiling point contained in the volatile component can be reduced, thereby improving the condensation efficiency.

For example, in the step of spraying the organic solvent onto the volatile components being transferred to the first condenser after being separated in the volatilization tank, the flow rate of the organic solvent may be 10kg/hr to 100kg/hr, preferably 20kg/hr to 90 kg/hr. In the step of spraying the organic solvent or the aromatic vinyl monomer onto the volatile components which are not condensed in the first condenser and are transferred to the second condenser, the flow rate of the organic solvent or the aromatic vinyl monomer may be 10kg/hr to 100kg/hr, preferably 15kg/hr to 90 kg/hr. In this case, the condensing efficiency can be improved, thereby significantly reducing the amount of volatile components emitted.

For example, in the step of spraying the organic solvent onto the volatile component being transferred to the first condenser after being separated in the volatilization tank, the organic solvent may be sprayed at a temperature of-10 ℃ to 40 ℃, preferably 0 ℃ to 30 ℃, more preferably 15 ℃ to 25 ℃. Within the range, the condensing efficiency can be improved.

In the present invention, the temperature of the organic solvent sprayed to the first condenser is not particularly limited.

For example, in the step of spraying the organic solvent or the aromatic vinyl monomer onto the volatile component which is not condensed in the first condenser and is being transferred to the second condenser, the organic solvent or the aromatic vinyl monomer may be sprayed at a flow rate of 10kg/hr to 200kg/hr or 10kg/hr to 110kg/hr, preferably 10kg/hr to 90kg/hr, more preferably 10kg/hr to 40 kg/hr. In this case, the content of the residual vinyl cyanide monomer having a low boiling point contained in the volatile component can be reduced, thereby improving the condensation efficiency.

In the present invention, the flow rate may be measured using a flow meter or calculated by a mass balance equation. The flow rate of uncondensed volatile components can be calculated using the input, output and recovered amounts according to a mass balance equation.

For example, in the step of spraying the organic solvent or the aromatic vinyl monomer onto the volatile component which is not condensed in the first condenser and is being transferred to the second condenser, the organic solvent or the aromatic vinyl monomer may be sprayed at a temperature of-10 ℃ to 40 ℃, preferably 0 ℃ to 30 ℃, more preferably 15 ℃ to 25 ℃. Within the range, the condensing efficiency can be improved.

In the present invention, the temperature of the organic solvent or the aromatic vinyl monomer injected into the second condenser is not particularly limited.

For example, the condensation in the first condenser may be carried out at a refrigerant temperature of 20 ℃ to 35 ℃ and an operating pressure of 3 torr to 100 torr, preferably at a refrigerant temperature of 25 ℃ to 33 ℃ and an operating pressure of 15 torr to 35 torr, more preferably at a refrigerant temperature of 25 ℃ to 30 ℃ and an operating pressure of 15 torr to 30 torr. Within the range, the condensing efficiency can be improved.

In the present invention, the operating pressure refers to the internal pressure of the condenser formed when the condenser is operated.

For example, the condensation in the second condenser may be carried out at a refrigerant temperature of-3 ℃ to 4 ℃ and an operating pressure of 5 torr to 50 torr, preferably at a refrigerant temperature of-1 ℃ to 4 ℃ and an operating pressure of 7 torr to 25 torr, more preferably at a refrigerant temperature of 0 ℃ to 4 ℃ and an operating pressure of 10 torr to 20 torr. Within the range, the condensing efficiency can be improved.

For example, the condensate condensed in the first condenser and the second condenser may be recovered, purified and reintroduced into the reactor. In this case, the raw material cost can be reduced.

For example, volatile components that are not condensed in the second condenser may be transferred to the vacuum unit, dissolved in the circulating fluid of the water-cooled pump, and discharged through the wastewater treatment process. During this process, a portion of the volatile components may be released into the atmosphere. According to the present invention, the amount of volatile components released into the atmosphere can be significantly reduced, and environmental pollution can be prevented.

For example, the organic solvent may include one or more selected from the group consisting of toluene, ethylbenzene, xylene, methyl ethyl ketone, and isobutyl methyl ketone. Preferably, the organic solvent used in the polymerization reaction and the organic solvent to be sprayed are the same. In this case, a component having a high boiling point may be added to the volatile component, and thus, a component having a low boiling point, that is, the proportion of the residual vinyl cyanide monomer, contained in the volatile component may be reduced, thereby improving the condensation efficiency.

For example, the aromatic vinyl compound may include one or more selected from the group consisting of styrene, α -methylstyrene, p-bromostyrene, p-chlorostyrene, and o-bromostyrene. In this case, the proportion of the residual vinyl cyanide monomer having a low boiling point contained in the volatile component can be reduced, thereby improving the condensation efficiency.

The apparatus for preparing an aromatic vinyl compound-vinyl cyan compound polymer according to the present invention comprises: a volatilization pot for separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent; and one condenser or two or more condensers connected in series for condensing the separated volatile components, wherein the production apparatus comprises: an injection device for injecting an organic solvent into a transfer tube for transporting the separated volatile components to a condenser; or when two or more condensers connected in series are included, an injection device for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transporting volatile components that have not been condensed in the first condenser to the second condenser. According to the present invention, the condensation efficiency can be improved, and the amount of volatile components released after condensation can be ignored.

In the present invention, a device configured to be connected to a transfer pipe and capable of ejecting an organic solvent or an aromatic vinyl monomer into the transfer pipe may be used as the ejection apparatus of the present invention without particular limitation. For example, a spray tube, a spray bottle, or the like may be used as the spray apparatus, and the spray apparatus may be provided with a nozzle.

For example, the apparatus for preparing an aromatic vinyl compound-vinyl cyan compound polymer according to the present invention comprises: a volatilization pot for separating volatile components from a polymerization product comprising an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomer, residual vinyl cyanide monomer and an organic solvent; and two or more condensers connected in series for condensing the separated volatile components, wherein the production apparatus comprises: an injection pipe for injecting an organic solvent into a transfer pipe for transporting the separated volatile component to a first condenser; or an injection pipe for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transferring volatile components that are not condensed in the first condenser to the second condenser. In this case, the condensation efficiency can be improved, and the amount of volatile components released after condensation can be ignored.

For example, the apparatus for preparing the aromatic vinyl compound-vinyl cyan compound polymer may include: an injection pipe for injecting an organic solvent into a transfer pipe for transporting the separated volatile component to a first condenser; and an injection pipe for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transferring the volatile components that are not condensed in the first condenser to the second condenser. In this case, the condensation efficiency can be improved and the amount of volatile components released after condensation in the second condenser can be ignored.

For example, the injection pipe may include a nozzle.

In the present invention, a nozzle generally used in the field to which the present invention pertains may be used as the nozzle of the present invention without particular limitation.

The volatilizing tank and the condenser included in the apparatus for producing an aromatic vinyl compound-vinyl cyanide compound polymer follow the above description, and thus a description thereof will be omitted.

A method and an apparatus for preparing an aromatic vinyl compound-vinyl cyan compound polymer according to the present invention will be described with reference to fig. 1 and 2. The embodiments of the present invention disclosed in the present specification and the drawings are provided only to assist understanding of the present invention, and the present invention is not limited to the embodiments. In addition, only the modes necessary for describing the present invention are described, and other obvious modes for carrying out the production method and the production apparatus are omitted in the drawings.

Fig. 1 schematically shows a volatilization pot (DV), a first condenser (1) used in examples 1 to 21 according to the present invention^stCN), a second condenser (2)^ndCN), a vacuum unit, a transfer pipe, and an injection pipe, and shows a manufacturing apparatus of the present invention including a volatilization tank for separating volatile components from a polymerization product containing an aromatic vinyl compound-vinyl cyanide compound polymer, residual aromatic vinyl monomers, residual vinyl cyanide monomers, and an organic solvent, wherein the manufacturing apparatus includes: an injection pipe for injecting the organic solvent into a transfer pipe for transferring the separated volatile components to the first condenser; or an injection pipe for injecting the organic solvent or the aromatic vinyl monomer into a transfer pipe for transferring the volatile components that are not condensed in the first condenser to the second condenser.

In addition, volatile components which are not condensed in the second condenser can be transferred into the vacuum unit and dissolved in the circulating fluid of the water-cooled pump. The dissolved volatile components can then be discharged to the outside or to the atmosphere through a wastewater treatment process.

Although not shown in the drawing, the condensate condensed in the first and second condensers may be reintroduced into the reactor.

In addition, fig. 2 schematically shows the volatilization pot (DV), the first condenser (1) used in comparative example 1, comparative example 8 and comparative example 12^stCN), a second condenser (2)^ndCN) and a vacuum unit. Referring to fig. 2, in the volatilization pot, volatile components are separated from a polymerization product comprising an aromatic vinyl compound-vinyl cyan compound polymer, residual aromatic vinyl monomers, and an organic solvent. The separated volatile components are condensed in a first condenser and a second condenser. In this case, the volatile components which are not condensed in the second condenser are transferred to the vacuum unit, compressed by the pump, and dissolved in the circulating fluid of the water-cooled pump. The dissolved volatile components are then discharged to the outside or to the atmosphere through a wastewater treatment process.

Although not shown in the drawing, the condensate condensed in the first and second condensers may be reintroduced into the reactor.

Hereinafter, the present invention will be described in more detail with reference to the following preferred examples. However, these examples are provided for illustrative purposes only, and should not be construed as limiting the scope and spirit of the present invention. Further, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are also within the scope of the appended claims.