Study the synthesis method of thioglycolic acid and carry out industrial production

Thiol acetic acid vinegar is a stabilizer for the processing of polyvinyl chloride resins. It has low toxicity or no toxicity, and can improve the transparency and thermal stability of products. It is widely used in the processing of polyvinyl chloride upper water pipelines, water pumps and other products. , food packaging, food processing plants, equipment and piping. Thioglycolic acid can form complexes with a variety of metal ions, showing a special color, and is often used as a spectrophotometric analysis reagent. In addition, thioglycolic acid can also be used as a polymerization catalyst, rust inhibitor in metal precision processing, crystallization nucleating agent for polypropylene processing, modifiers for coatings and fibers, corrosion inhibitors in oil drilling, and lubrication. Oil additives.

Industrial production methods for thioglycolic acid include sodium hydrosulfide method, thiourea method, polysulfide method, and Bunte salt method. China's manufacturers are mainly using the sulfur vein method. Our country began to study the synthesis method of thioglycolic acid from the 1970s and carried out industrial production. The products are mainly used as cool base tin heat stabilizers, hair curlers and depilatories.

Due to the small production capacity of thioglycolic acid in China, the output can not meet the actual production needs, and it still needs to rely on imports to make up for it. In particular, high-purity thioglycolic acid almost all rely on imports. Relevant units and production enterprises should strengthen the research and development of thioglycolic acid, continuously improve and perfect the production process, improve the product quality, and expand the production scale at an appropriate time to meet the actual domestic production needs.