A kind of post-processing method of pivalic acid synthesis reaction solution

Abstract

The invention belongs to the technical field of pivalic acid synthesis, and in particular relates to a post-processing method for a pivalic acid synthesis reaction solution. The post-processing method of the pivalic acid synthesis reaction solution is that after the pivalic acid synthesis reaction is completed, a compound extractant is added to the reaction solution, extracted and separated to obtain a pivalic acid extract and a raffinate, and the pivalic acid is rectified. The acid extraction solution is to obtain the pure product of pivalic acid; the compound extraction agent includes a main extraction agent and a co-extracting agent, and the main extraction agent is selected from any one of methylene chloride, chloroform or chlorobenzene or The co-extracting agent is selected from any one or more of cyclohexane, ethyl acetate or isopropyl ether. The post-treatment method of the pivalic acid synthesis reaction solution of the present invention produces less waste water, greatly reduces the pressure on environmental protection, can realize continuous operation at the same time, and has the advantages of high efficiency, environmental protection, low energy consumption, low production cost and the like.

Description

technical field

[0001] The invention belongs to the technical field of pivalic acid synthesis, and in particular relates to a post-processing method for a pivalic acid synthesis reaction solution. Background technique

[0002] Pivalic acid is an important chemical raw material, which can be used in the production and manufacture of adhesives, medicines, initiators, pesticides, fragrances, etc. It is the raw material for the synthesis of many drugs and fragrances, and can be used as a stabilizer for polymer materials such as polyvinyl chloride and a catalyst for some chemical reactions.

[0003] In industry, isobutylene and carbon monoxide are generally used as raw materials, and concentrated sulfuric acid is used as a catalyst to synthesize pivalic acid under a certain pressure. After the high-pressure reaction is completed, water is generally added to hydrolyze the reaction solution to separate the pivalic acid from the concentrated sulfuric acid, and then a high-purity pi...