Harmless waste resin treating technology

Abstract

The invention discloses a harmless waste resin treating technology which comprises the following steps: performing preheating treatment on waste resin generated in a 2-mercaptobenzothiazole production process to obtain liquid waste resin for standby application; performing low-temperature catalytic cracking treatment on the standby liquid waste resin, keeping a temperature as 70 to 200 DEG C, keeping a pressure as -1 to 0MPa and performing catalytic cracking for 10 to 20 hours; performing high-temperature cracking treatment, keeping a temperature as 200 to 450 DEG C, keeping a pressure as -1 to 0MPa and keeping cracking time as 20 to 40 hours; performing separation and collection treatment: treating separated gas-state cracking distillate by liquid caustic soda and generating sodium hydrosulfide by chemical reaction; introducing heterocyclic compound of cracked residual component into a storage tank having water, taking out after being cooled and cured and packaging. The harmless waste resin treating technology disclosed by the invention achieves resource reutilization, greatly reduces production cost, saves resources and enhances product competitiveness.

Description

technical field [0001] The invention relates to the field of dimercaptobenzothiazole production and treatment, in particular to a harmless treatment process for waste resin. Background technique [0002] The traditional methods of producing dimercaptobenzothiazole (accelerator M) include acid-base method and solvent method. However, at present, these two methods will generate about 20% waste resin in the production process, which is sticky Thick, smelly, flammable and poisonous, harmful to the body, this waste resin pollutes the environment and is listed as hazardous solid waste by the environmental protection department. At present, there are many studies on the extraction and utilization of a small amount of accelerator M contained in the resin. However, There is a lack of awareness of environmental protection in the treatment of waste resin, because waste resin contains 0.5%-1% carbon disulfide, 1%-2% toluene, 1%-2% aniline, 1%-2% accelerator M, 3%-5% benzothiazole, 30%-...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a harmless treatment process for waste resins. Through a series of procedures, the invention makes the waste resins harmless, and the final solid product is insoluble. It is suitable for water, tasteless, non-flammable, and can be used as a raw material for waterproof materials. After cooling, the gaseous distillate can continue to participate in the production of dimercaptobenzothiazole as a raw material. It is sold as waterproof materials to generate economic benefits and In addition to social benefits, it also avoids the problem of long-term storage of hazardous waste and the problem of secondary pollution caused by direct combustion

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