阅读说明：本技术 一种羰基铑催化剂的回收装置及其回收方法 (Recovery device and recovery method of rhodium carbonyl catalyst ) 是由 郑铁江 蒋国强 王金芳 李勋波 姜伟伟 肖春生 卢克 于 2021-09-02 设计创作，主要内容包括：本发明涉及催化剂的回收技术领域,尤其是一种羰基铑催化剂的回收装置,包括水洗塔、第一管道、粗丁醛泵、第二管道、双效蒸发系统、第三管道、气提塔、第四管道、第五管道和羰基合成反应系统；第一管道的一端与粗丁醛泵进口端固定连接,第一管道的另一端与水洗塔的下部固定接通；本发明的粗丁醛泵可以将粗丁醛运送到水洗塔进行水洗,通过双效蒸发系统用于对丁醛进行加热蒸发成气体状态,从而实现除杂回收,而第四管道可以将回收的羰基铑催化剂返回至羰基合成反应系统重新利用；这种方式可以大大提高羰基铑催化剂的回收率,从而节约成本。(The invention relates to the technical field of catalyst recovery, in particular to a recovery device of a rhodium carbonyl catalyst, which comprises a water washing tower, a first pipeline, a crude butyraldehyde pump, a second pipeline, a double-effect evaporation system, a third pipeline, a stripping tower, a fourth pipeline, a fifth pipeline and a carbonyl synthesis reaction system, wherein the first pipeline is connected with a crude butyraldehyde pump; one end of the first pipeline is fixedly connected with the inlet end of the crude butyraldehyde pump, and the other end of the first pipeline is fixedly communicated with the lower part of the water washing tower; the crude butyraldehyde pump can convey crude butyraldehyde to a water washing tower for water washing, a double-effect evaporation system is used for heating and evaporating butyraldehyde into a gas state, so that impurity removal and recovery are realized, and a fourth pipeline can return a recovered rhodium carbonyl catalyst to a carbonyl synthesis reaction system for reuse; this way, the recovery rate of rhodium carbonyl catalyst can be greatly improved, thereby saving the cost.)

1. The recovery device of the rhodium carbonyl catalyst is characterized by comprising a water washing tower (1), a first pipeline (2), a crude butyraldehyde pump (3), a second pipeline (5), a double-effect evaporation system (6), a third pipeline (8), a stripping tower (9), a fourth pipeline (10), a fifth pipeline (12) and a oxo reaction system (14); one end of the first pipeline (2) is fixedly connected with the outlet end of the crude butyraldehyde pump (3), and the other end of the first pipeline (2) is fixedly communicated with the lower part of the water washing tower (1); one end of the second pipeline (5) is fixedly connected with the outlet end of the double-effect evaporation system (6), and the other end of the second pipeline (5) is fixedly communicated with the upper part of the water washing tower (1); one end of the third pipeline (8) is fixedly connected with the top of the water washing tower (1), and the other end of the third pipeline (8) is communicated with the stripping tower (9); one end of the fourth pipeline (10) is fixedly connected with the bottom of the water washing tower (1), and the other end of the fourth pipeline (10) is fixedly connected with the inlet end of the double-effect evaporation system (6); one end of the fifth pipeline (12) is fixedly connected with the outlet end of the double-effect evaporation system (6), and the other end of the fifth pipeline (12) is connected with the oxo reaction system (14).

2. The recovery device of a rhodium carbonyl catalyst according to claim 1, wherein a first regulating valve group (4) is fixedly installed on the first pipeline (2), a second regulating valve group (7) is fixedly installed on the second pipeline (5), a third regulating valve group (11) is fixedly installed on the fourth pipeline (10), and a fourth regulating valve group (13) is fixedly installed on the fifth pipeline (12).

3. The recovery device of a rhodium carbonyl catalyst as claimed in claim 1, wherein the inlet end of said crude butyraldehyde pump (3) is externally connected with a corresponding crude butyraldehyde storage tank through a conduit.

4. The recovery device of a rhodium carbonyl catalyst according to claim 1, characterized in that, the inside of the water scrubber (1) is provided with an extraction device (15), the extraction device (15) comprises a separation bucket (151), the separation bucket (151) is fixedly arranged inside the water scrubber (1), and the separation bucket (151) is of a conical structure with an open top.

5. The recovery device of a rhodium carbonyl catalyst according to claim 4, characterized in that a partition plate (152) is fixedly installed at the top end of the inner side of the separation hopper (151), an overflow groove (154) is opened at one end of the partition plate (152), and a slow flow pore plate (153) is fixedly installed at the bottom end of the inner side of the separation hopper (151).

6. A rhodium carbonyl catalyst recovery device according to claim 5, characterized in that, the outlet end of the first pipe (2) is connected with the bottom end of the separation hopper (151), the inlet end of the fourth pipe (10) is connected with the bottom of the separation hopper (151), the third pipe (8) is located at the top end of the inner side of the separation hopper (151) and above the partition plate (152), and the outlet end of the second pipe (5) is located at the position of the overflow trough (154).

7. The recovery device of rhodium carbonyl catalyst according to claim 1, wherein a plurality of packing layers (111) are filled in the water scrubber (1), and the packing layers (111) are used for separating rhodium carbonyl catalyst from butyraldehyde.

8. The method for recovering a rhodium carbonyl catalyst according to claim 1, characterized by comprising the steps of:

step 1: filling water from the upper part of the water washing tower to be used as a continuous phase, and continuously supplementing fresh water;

step 2: continuously feeding the crude butyraldehyde containing the rhodium carbonyl catalyst to the lower part of a water washing tower, and performing countercurrent flow of water and butyraldehyde to finish extraction;

and step 3: sending the butyraldehyde after water washing to an air stripping tower of a system after carbonyl synthesis for subsequent production;

and 4, step 4: the water containing the rhodium catalyst is completely separated from the rhodium carbonyl catalyst in the double-effect evaporation system, the separated purified water returns to a water washing tower for water washing, and the separated rhodium carbonyl catalyst returns to the main oxo synthesis system for reuse.

Technical Field

The invention relates to the technical field of catalyst recovery, in particular to a recovery device and a recovery method for a rhodium carbonyl catalyst.

Background

Butyraldehyde is an important organic chemical raw material and is colorless liquid at normal temperature; propylene and synthesis gas are used as raw materials in a butanol-octanol device, rhodium carbonyl is used as a catalyst, and mixed butyraldehyde is generated in a oxo reactor;

after the rhodium carbonyl catalyst is subjected to catalytic reaction, the rhodium carbonyl catalyst needs to be recycled, but the prior art is not ideal in the technology for recycling the rhodium carbonyl catalyst, so that the rhodium carbonyl catalyst cannot be completely recycled, and the rhodium carbonyl catalyst is wasted.

Disclosure of Invention

The invention aims to solve the defect that the recovery technology is not ideal in the prior art, and provides a recovery device of a rhodium carbonyl catalyst.

In order to achieve the purpose, the invention adopts the following technical scheme:

designing a recovery device of a rhodium carbonyl catalyst, comprising a water washing tower, a first pipeline, a crude butyraldehyde pump, a second pipeline, a double-effect evaporation system, a third pipeline, a stripping tower, a fourth pipeline, a fifth pipeline and a carbonyl synthesis reaction system; one end of the first pipeline is fixedly connected with the outlet end of the crude butyraldehyde pump, and the other end of the first pipeline is fixedly communicated with the lower part of the water washing tower; one end of the second pipeline is fixedly connected with the outlet end of the double-effect evaporation system, and the other end of the second pipeline is fixedly communicated with the upper part of the water washing tower; one end of the third pipeline is fixedly connected with the top of the water washing tower, and the other end of the third pipeline is communicated with the stripping tower; one end of the fourth pipeline is fixedly connected with the bottom of the water washing tower, and the other end of the fourth pipeline is fixedly connected with the inlet end of the double-effect evaporation system; one end of the fifth pipeline is fixedly connected with the outlet end of the double-effect evaporation system, and the other end of the fifth pipeline is connected with the oxo-synthesis reaction system.

Preferably, fixed mounting has first regulating valve group on the first pipeline, fixed mounting has second regulating valve group on the second pipeline, fixed mounting has third regulating valve group on the fourth pipeline, fixed mounting has fourth regulating valve group on the fifth pipeline.

Preferably, the inlet end of the crude butyraldehyde pump is externally connected with a corresponding crude butyraldehyde storage tank through a conduit.

Preferably, an extraction device is installed inside the water washing tower, the extraction device comprises a separation hopper, the separation hopper is fixedly installed inside the water washing tower, and the separation hopper is of a conical structure with an open top.

Preferably, a partition plate is fixedly installed at the top end of the inner side of the separation hopper, an overflow groove is formed in one end of the partition plate, and a slow flow pore plate is fixedly installed at the bottom end of the inner side of the separation hopper.

Preferably, the outlet end of the first pipeline is communicated with the bottom end of the separation hopper, the inlet end of the fourth pipeline is communicated with the bottom of the separation hopper, the third pipeline is located at the top end of the inner side of the separation hopper and above the partition plate, and the outlet end of the second pipeline is located at the overflow tank.

Preferably, a plurality of packing layers are filled in the water washing tower, and the packing layers are used for separating the rhodium carbonyl catalyst from the butyraldehyde.

The invention also provides a method for recovering the rhodium carbonyl catalyst, which comprises the following steps:

step 1: filling water from the upper part of the water washing tower to be used as a continuous phase, and continuously supplementing fresh water;

step 2: continuously feeding the crude butyraldehyde containing the rhodium carbonyl catalyst to the lower part of a water washing tower, and performing countercurrent flow of water and butyraldehyde to finish extraction;

and step 3: sending the butyraldehyde after water washing to an air stripping tower of a system after carbonyl synthesis for subsequent production;

and 4, step 4: the water containing the rhodium catalyst is completely separated from the rhodium carbonyl catalyst in the double-effect evaporation system, the separated purified water returns to a water washing tower for water washing, and the separated rhodium carbonyl catalyst returns to the main oxo synthesis system for reuse.

The recovery device of the rhodium carbonyl catalyst provided by the invention has the beneficial effects that: the crude butyraldehyde pump can convey crude butyraldehyde to a water washing tower for water washing, a double-effect evaporation system is used for heating and evaporating butyraldehyde into a gas state, so that impurity removal and recovery are realized, and a fourth pipeline can return a recovered rhodium carbonyl catalyst to a carbonyl synthesis reaction system for reuse; this way, the recovery rate of rhodium carbonyl catalyst can be greatly improved, thereby saving the cost.

Drawings

FIG. 1 is a schematic structural diagram I of a recovery apparatus for a rhodium carbonyl catalyst according to the present invention;

FIG. 2 is a schematic structural diagram II of a recovery apparatus for a rhodium carbonyl catalyst according to the present invention;

FIG. 3 is a schematic view of the inside structure of a water washing column of example 1 of a recovery apparatus for a rhodium carbonyl catalyst according to the present invention;

FIG. 4 is a schematic view of the inside structure of a water washing column of example 2 of a recovery apparatus for a rhodium carbonyl catalyst according to the present invention;

FIG. 5 is a schematic structural diagram of an extraction apparatus in example 2 of a recovery apparatus for a rhodium carbonyl catalyst according to the present invention.

In the figure: the device comprises a water washing tower 1, a first pipeline 2, a crude butyraldehyde pump 3, a first regulating valve bank 4, a second pipeline 5, a double-effect evaporation system 6, a second regulating valve bank 7, a third pipeline 8, an air stripping tower 9, a fourth pipeline 10, a third regulating valve bank 11, a packing layer 111, a fifth pipeline 12, a fourth regulating valve bank 13, a oxo reaction system 14, an extraction device 15, a separation bucket 151, a partition plate 152, a flow-slowing pore plate 153 and an overflow groove 154.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1:

referring to fig. 1-3, a recovery device for a rhodium carbonyl catalyst comprises a water washing tower 1, a first pipeline 2, a crude butyraldehyde pump 3, a second pipeline 5, a double-effect evaporation system 6, a third pipeline 8, a stripping tower 9, a fourth pipeline 10, a fifth pipeline 12 and a oxo reaction system 14; one end of the first pipeline 2 is fixedly connected with the outlet end of the crude butyraldehyde pump 3, and the inlet end of the crude butyraldehyde pump 3 is externally connected with a corresponding crude butyraldehyde storage tank through a conduit; the other end of the first pipeline 2 is fixedly communicated with the lower part of the water washing tower 1, and the crude butyraldehyde pump 3 is used for conveying crude butyraldehyde to the water washing tower 1 for water washing; a first regulating valve group 4 is fixedly arranged on the first pipeline 2, and the first regulating valve group 4 is used for regulating the flow of the first pipeline 2; one end of a second pipeline 5 is fixedly connected with the outlet end of a double-effect evaporation system 6, the other end of the second pipeline 5 is fixedly communicated with the upper part of the water washing tower 1, and the double-effect evaporation system 6 is used for separating the rhodium carbonyl catalyst from water; a second regulating valve group 7 is fixedly arranged on the second pipeline 5; the second pipeline 5 is used for reintroducing the water after the evaporation cooling into the water washing tower 1 for recycling.

One end of a third pipeline 8 is fixedly connected with the top of the water washing tower 1, the other end of the third pipeline 8 is communicated with a stripping tower 9, and a third regulating valve group 11 is fixedly installed on a fourth pipeline 10; one end of a fourth pipeline 10 is fixedly connected with the bottom of the water washing tower 1, and the water washing tower 1 is used for separating butyraldehyde from rhodium carbonyl catalyst; the other end of the fourth pipeline 10 is fixedly connected with the inlet end of the double-effect evaporation system 6; one end of a fifth pipeline 12 is fixedly connected with the outlet end of the double-effect evaporation system 6, the other end of the fifth pipeline 12 is connected with a oxo reaction system 14, and a fourth regulating valve group 13 is fixedly arranged on the fifth pipeline 12; a fourth conduit 10 for returning the recovered rhodium carbonyl catalyst to the oxo reaction system 14 for reuse; the inside of the water washing tower 1 is filled with a plurality of packing layers 111, and the packing layers 111 are used for separating rhodium carbonyl catalyst from butyraldehyde.

The working principle is as follows: a crude butyraldehyde pump 3 introduces crude butyraldehyde into a water washing tower 1 through a first pipeline 2, simultaneously a second pipeline 5 introduces a large amount of continuous water into the water washing tower 1, heavy-phase crude butyraldehyde liquid passes through a packing layer 111 to separate a rhodium carbonyl catalyst from butyraldehyde, simultaneously the rhodium carbonyl catalyst is mixed with the water, at the moment, the butyraldehyde in a light phase is introduced into a stripping tower 9 through a third pipeline 8, the rhodium carbonyl catalyst in a heavy phase and the water are introduced into a double-effect evaporation system 6 through a fourth pipeline 10, the rhodium carbonyl catalyst and the water are separated after high-temperature heating and evaporation, steam is cooled and refluxed to the second pipeline 5 for reuse, and the rhodium carbonyl catalyst is introduced into a carbonyl synthesis reaction system 14 through a fifth pipeline 12 for reuse; this way, the recovery rate of rhodium carbonyl catalyst can be greatly improved, thereby saving the cost.

Example 2:

referring to fig. 4-5, an extraction device 15 is installed inside the water washing tower 1, the extraction device 15 includes a separation bucket 151, the separation bucket 151 is fixedly installed inside the water washing tower 1, the separation bucket 151 is of a conical structure with an open top, and the separation bucket 151 can separate water with different densities from butyraldehyde; a partition plate 152 is fixedly installed at the top end of the inner side of the separation hopper 151, an overflow groove 154 is formed in one end of the partition plate 152, and butyraldehyde liquid can flow onto the partition plate 152 through the overflow groove 154; a slow flow pore plate 153 is fixedly arranged at the bottom end of the inner side of the separation hopper 151; the slow flow orifice 153 can slow down the outflow speed of the rhodium carbonyl catalyst, so that the liquid level in the separation hopper 151 can be ensured to rise to realize the overflow of the butyraldehyde; the outlet end of the first pipeline 2 is communicated with the bottom end of the separating hopper 151, the inlet end of the fourth pipeline 10 is communicated with the bottom of the separating hopper 151, the third pipeline 8 is positioned at the top end of the inner side of the separating hopper 151 and above the partition plate 152, and the outlet end of the second pipeline 5 is positioned at the position of the overflow groove 154.

The working principle is as follows: the crude butyraldehyde pump 3 leads the crude butyraldehyde into a separation bucket 151 of the water washing tower 1 through a first pipeline 2, meanwhile, a second pipeline 5 leads a large amount of continuous water into the separation bucket 151, the butyraldehyde is lower in density than water and slightly soluble in water at normal temperature, so that the butyraldehyde is separated from water, the butyraldehyde is positioned at the upper layer, and the slow flow pore plate 153 can slow down the outflow speed of the rhodium carbonyl catalyst and the water, so that the liquid level in the separation bucket 151 rises, the butyraldehyde at the upper layer overflows through an overflow groove 154, and is led out to the air stripping tower 9 through a third pipeline 8; the rhodium carbonyl catalyst and water are led out of the double-effect evaporation system 6 through a fourth pipeline 10, the rhodium carbonyl catalyst and water are separated after high-temperature heating and evaporation, water vapor is cooled and flows back to the second pipeline 5 for reuse, and the rhodium carbonyl catalyst is led into the oxo reaction system 14 through a fifth pipeline 12 for reuse; this way, the recovery rate of rhodium carbonyl catalyst can be greatly improved, thereby saving the cost.

Example 3:

the invention also provides a method for recovering the rhodium carbonyl catalyst, which comprises the following steps:

step 1: filling water from the upper part of the water washing tower to be used as a continuous phase, and continuously supplementing fresh water;

step 2: continuously feeding the crude butyraldehyde containing the rhodium carbonyl catalyst to the lower part of a water washing tower, and performing countercurrent flow of water and butyraldehyde to finish extraction;

and step 3: sending the butyraldehyde after water washing to an air stripping tower of a system after carbonyl synthesis for subsequent production;

and 4, step 4: the water containing the rhodium catalyst is completely separated from the rhodium carbonyl catalyst in the double-effect evaporation system, the separated purified water returns to a water washing tower for water washing, and the separated rhodium carbonyl catalyst returns to the main oxo synthesis system for reuse.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.