阅读说明：本技术 一种废弃abs塑料的回收工艺 (A kind of recovery process of discarded ABS plastic ) 是由 朱保义 沈岑宽 卢山龙 任永刚 陈华勇 胡磊 吴国庆 王武钧 于 2019-07-30 设计创作，主要内容包括：本发明公开了一种废弃ABS塑料的回收工艺,具体回收过程如下：将废弃的ABS塑料分别经过酸和碱处理后得到二次处理产物,将二次处理产物和丁腈橡胶同时加入丁酮中搅拌溶解,然后向其中加入过氧化苯甲酰,升温至95-100℃,然后向其中加入丙烯酸六氟丁酯和硅烷化处理剂,恒温反应1-2h后升温至120-125℃回流反应4-5h,然后进行减压蒸馏除去其中的丙酮溶液和未反应完全的丙烯酸六氟丁酯,得到改性ABS。本发明制备的硅烷化处理剂中两端均含有不饱和键,能够同时进行聚合反应,提高了聚合物的聚合程度,进而提高了聚合物的性能。(The invention discloses a kind of recovery process of discarded ABS plastic, specific removal process is as follows: discarded ABS plastic is obtained secondary treatment product after bronsted lowry acids and bases bronsted lowry is handled respectively, stirring and dissolving in butanone is added in secondary treatment product and nitrile rubber simultaneously, then benzoyl peroxide is added thereto, it is warming up to 95-100 DEG C, then hexafluorobutyl acrylate and silanization treating agent are added thereto, 120-125 DEG C of back flow reaction 4-5h is warming up to after isothermal reaction 1-2h, then it carries out vacuum distillation and removes acetone soln and the complete hexafluorobutyl acrylate of unreacted therein, obtain modified ABS.Unsaturated bond is contained at both ends in silanization treating agent prepared by the present invention, can carry out polymerization reaction simultaneously, improve the extent of polymerization of polymer, and then improve the performance of polymer.)

1. a kind of recovery process of discarded ABS plastic, which is characterized in that specific removal process is as follows:

The first step, is heated to 220-225 DEG C of fusing for discarded ABS plastic, and it is 30% that mass concentration is then added thereto Hydrochloric acid solution is uniformly mixed rear return stirring 40-50min, then cools to room temperature, be then filtered, filter residue is dried It is dry, obtain single treatment product；

Single treatment product is heated to 220-225 DEG C of fusing, the hydrogen that mass concentration is 20% is then added thereto by second step Sodium hydroxide solution is stirred at reflux reaction 20-30min, then cools to room temperature, and product is then evaporated removing wherein solvent Water is warming up to 80-85 DEG C of stirring and dissolving then by solid adding into acetone, is then filtered dissolved product, removes Wherein undissolved impurity, and filtrate is evaporated removing solvent acetone and obtains secondary treatment product；

Secondary treatment product and nitrile rubber are added stirring and dissolving in butanone simultaneously, peroxide are then added thereto by third step Change benzoyl, be warming up to 95-100 DEG C, hexafluorobutyl acrylate and silanization treating agent, isothermal reaction 1- are then added thereto It is warming up to 120-125 DEG C of back flow reaction 4-5h after 2h, then carries out vacuum distillation removing acetone soln therein and unreacted is complete Full hexafluorobutyl acrylate, obtains modified ABS.

2. a kind of recovery process of discarded ABS plastic according to claim 1, which is characterized in that discarded in the first step The hydrochloric acid solution that ABS plastic and mass concentration are 30% is mixed according to the ratio that mass ratio is 1:3.5-3.7.

3. a kind of recovery process of discarded ABS plastic according to claim 1, which is characterized in that once locate in second step It is mixed between the sodium hydroxide solution that reason product and mass concentration are 20% with mass ratio for the ratio of 1:2.8-2.9.

4. a kind of recovery process of discarded ABS plastic according to claim 1, which is characterized in that secondary place in third step It is 1:0.73- that product, nitrile rubber, hexafluorobutyl acrylate, silanization treating agent and benzoyl peroxide, which are managed, according to mass ratio The ratio of 0.75:0.16-0.18:0.21-0.22:0.31-0.33 mixes.

5. a kind of recovery process of discarded ABS plastic according to claim 1, which is characterized in that silanization treating agent Specific preparation process is as follows: reaction vessel is added in 1,5- hexadiene -3,4- glycol, nano silica and sodium hydroxide simultaneously In, and water is added into reaction vessel, it is warming up to 200-220 DEG C of back flow reaction 15-16h, is then evaporated under reduced pressure product, Aqueous solvent therein is removed, while the solid product obtained after evaporation being added in acetone soln and is stirred 3-5min, then It is filtered, filtrate is evaporated after removing filter residue, obtains silanization treating agent.

6. a kind of recovery process of discarded ABS plastic according to claim 5, which is characterized in that 1,5- hexadiene -3,4- Glycol, nano silica and sodium hydroxide are mixed according to the ratio that the ratio between amount of substance is 3:1:2.

Technical field

The invention belongs to plastics recovery fields, are related to a kind of recovery process of discarded ABS plastic.

Background technique

ABS plastic is light, nontoxic, has good molding processibility, and product surface is highly polished, and has good painting Dress property and dyeability are widely used in plating processing, but ABS plastic is due to wherein containing unsaturated bond, in ultraviolet light Be easy to generate free radical under long-term irradiation, and then be aging so that the reduced performance of plastics, existing ABS electroplating plastic due to Surface, which is contained, is electroplate with metal, is unfavorable for recycling, and the performance of discarded ABS plastic is poor, usually directly will be at plastics Reason is discarded, but directly discarded plastics are unfavorable for environmental protection and economize on resources.

Summary of the invention

The purpose of the present invention is to provide a kind of recovery process of discarded ABS plastic, and discarded ABS plastic is passed through soda acid The coat of metal on surface and the reinforcing agent of internal addition are removed after processing, it is then modified by free radical polymerization, so that fourth Nitrile rubber, silanization treating agent and hexafluorobutyl acrylate are introduced into product, so that product toughness with higher and anti-aging Performance, and since the resistance to low temperature of nitrile rubber is lower, by introducing siloxanes key, and then improve the resistance to height of product Warm nature energy, and then the recycling of the ABS plastic after aging is realized, and since the reinforcing agent in ABS plastic is by pre- place Reason realizes three more so that ABS is capable of providing more action sites when reacting with nitrile rubber and hexafluorobutyl acrylate Good polymerization.

The purpose of the present invention can be achieved through the following technical solutions:

A kind of recovery process of discarded ABS plastic, specific removal process are as follows:

The first step, is heated to 220-225 DEG C of fusing for discarded ABS plastic, and mass concentration is then added thereto and is 30% hydrochloric acid solution is uniformly mixed rear return stirring 40-50min, then cools to room temperature, be then filtered, will Filter residue drying, obtains single treatment product；The hydrochloric acid solution that wherein discarded ABS plastic and mass concentration are 30% is according to quality Than the ratio mixing for 1:3.5-3.7；Due to ABS surface electroplating metal material by with hcl reaction, be capable of forming easily The metal ion of dissolution, and the reinforcing agent of metal class is added in plastics, after being heated to 220-225 DEG C, plastic molting, And the hydrochloric acid solution being added thereto at this time forms hydrogen chloride gas at high temperature, is blended in the plastics of melting, it can be with modeling Metallics in material is reacted, so that metal ion therein is dissolved in hydrochloric acid solution, and vapor therein It is then stayed in the reaction vessel by reflux, the processing of heavy metal ion in ABS is realized by filtering；

Second step, is heated to 220-225 DEG C of fusing for single treatment product, and it is 20% that mass concentration is then added thereto Sodium hydroxide solution, be stirred at reflux reaction 20-30min, then cool to room temperature, then by product be evaporated removing wherein Aqueous solvent is warming up to 80-85 DEG C of stirring and dissolving then by solid adding into acetone, is then filtered dissolved product, Wherein undissolved impurity is removed, and filtrate is evaporated removing solvent acetone and obtains secondary treatment product；Wherein primary place It is mixed between the sodium hydroxide solution that reason product and mass concentration are 20% with mass ratio for the ratio of 1:2.8-2.9；Due to ABS Added with reinforcing agents such as talcum powder in plastics, wherein the sodium metasilicate contained can react dissolution with sodium hydroxide, while wherein connecing Heavy metal ion of the branch on ABS can carry out precipitation reaction with sodium hydroxide, then contain ABS in filtered solid matter Plastics and sediment, since ABS plastic is soluble in acetone soln, and hydroxide sodium vapor lamp heavy metal precipitation substance does not dissolve in third then Ketone obtains more pure ABS solution, is then evaporated processing, obtains ABS by being filtered after mixing with acetone；

Secondary treatment product and nitrile rubber are added stirring and dissolving in butanone simultaneously, are then added thereto by third step Benzoyl peroxide is warming up to 95-100 DEG C, and hexafluorobutyl acrylate then is added thereto and silanization treating agent, constant temperature are anti- It is warming up to 120-125 DEG C of back flow reaction 4-5h after answering 1-2h, vacuum distillation is then carried out and removes acetone soln therein and not instead Complete hexafluorobutyl acrylate is answered, modified ABS is obtained；Wherein secondary treatment product, nitrile rubber, hexafluorobutyl acrylate, Silanization treating agent and benzoyl peroxide are 1:0.73-0.75:0.16-0.18:0.21-0.22:0.31- according to mass ratio 0.33 ratio mixing, although wherein still thering are moieties not to be fully oxidized, In simultaneously because ABS plastic aoxidizes Generate free radical under the action of benzoyl peroxide, and nitrile rubber and hexafluorobutyl acrylate are in the work of benzoyl peroxide Free radical is also generated under so that between nitrile rubber, ABS plastic, hexafluorobutyl acrylate and silanization treating agent into Row free radical polymerization, so that nitrile rubber, silanization treating agent and hexafluorobutyl acrylate are introduced into product, so that product Toughness and anti-aging property with higher, and since the resistance to low temperature of nitrile rubber is lower, by introducing siloxanes key, And then the high and low temperature resistance of product is improved, and then realize the recycling of the ABS plastic after aging, and due to ABS Reinforcing agent in plastics is by pretreatment, so that ABS is capable of providing more when reacting with nitrile rubber and hexafluorobutyl acrylate More action sites realizes that three preferably polymerize, and unsaturated bond is contained at both ends in silanization treating agent, can be simultaneously Polymerization reaction is carried out, improves the extent of polymerization of polymer, and then improve the performance of polymer；

The specific preparation process of silanization treating agent is as follows: by 1,5- hexadiene -3,4- glycol, nano silica and hydrogen Sodium oxide molybdena is added in reaction vessel simultaneously, and water is added into reaction vessel, is warming up to 200-220 DEG C of back flow reaction 15-16h, Then product is evaporated under reduced pressure, removes aqueous solvent therein, while the solid product obtained after evaporation addition acetone is molten It is stirred 3-5min in liquid, is then filtered, filtrate is evaporated after removing filter residue, obtains silanization treating agent；Wherein 1, 5- hexadiene -3,4- glycol, nano silica and sodium hydroxide are mixed according to the ratio that the ratio between amount of substance is 3:1:2, by It can be reacted with the o-dihydroxy in 1,5- hexadiene -3,4- glycol in silica, generate siloxanes key, so that It is connected between 1,5- hexadiene -3,4- glycol by siloxanes key, so that not only containing silicon oxygen in the silanization treating agent of preparation Alkane key contains multiple olefin groups simultaneously, is able to carry out radical reaction.

Beneficial effects of the present invention:

1, the coat of metal on surface and the increasing of internal addition are removed after the present invention handles discarded ABS plastic by soda acid Strong agent, it is then modified by free radical polymerization, so that nitrile rubber, silanization treating agent and hexafluorobutyl acrylate introduce In product, so that product toughness with higher and anti-aging property, and since the resistance to low temperature of nitrile rubber is lower, lead to Introducing siloxanes key is crossed, and then improves the high and low temperature resistance of product, and then realizes the recycling benefit of the ABS plastic after aging With, and since the reinforcing agent in ABS plastic is by pretreatment, so that ABS is anti-with nitrile rubber and hexafluorobutyl acrylate At once more action sites are capable of providing, realize that three preferably polymerize, and then realize the abundant recycling benefit of ABS plastic With, and then solve existing ABS electroplating plastic and contained due to surface and be electroplate with metal, it is unfavorable for recycling, and discarded ABS The performance of plastics is poor, usually directly discards process in plastics, but directly discarded plastics are unfavorable for environmental protection and save money The problem of source.

2, unsaturated bond is contained at both ends in silanization treating agent prepared by the present invention, can carry out polymerization reaction simultaneously, The extent of polymerization of polymer is improved, and then improves the performance of polymer.

Specific embodiment