2,2'-di-thio-bibenzoyl cholride chemical synthesis method

A technology of dithiobisbenzoyl chloride and dithiobisbenzoic acid, applied in 2 fields, can solve the problems of high sealing requirements of reaction equipment, low product yield and purity, and high production cost, and achieves high implementation value and Social and economic benefits, low production cost, and no three wastes
CN1762998AInactive Publication Date: 2006-04-26ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2006-04-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides the reaction process of di(trichloromethyl) carbonate and 2, 2'-dithio diphenyl formic acid at 20-150 deg.c inside organic solvent under the action of organic amine catalyst to prepare 2, 2'-dithio diphenyl formyl chloride. The chemical synthesis process eliminates unsafe hidden trouble and environmental pollution radically, and has the advantages of cheap material, high safety and reliability, high reaction yield, low production cost and no waste generated.
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Description

(1) Technical field

[0001] The invention relates to a chemical synthesis method of 2,2'-dithiobisbenzoyl chloride. (2) Background technology

[0002] The chemical synthesis method of prior art 2,2'-dithiobisbenzoyl chloride is synthesized from 2,2'-dithiobisbenzoic acid and thionyl chloride as raw materials. As proposed in US 5,463,122, it is prepared by refluxing 0.082mol of 2,2'-dithiobisbenzoic acid and 350mL of thionyl chloride for 18h.

[0003] However, due to thionyl chloride (SOCl 2 ) is an acyl chloride reagent, which is severely corroded and requires high equipment, and the tail gas of the acyl chloride reaction contains a large amount of asphyxiating sulfur dioxide gas (one of the six indicators strictly controlled by the national environmental protection on the atmosphere) which is difficult to handle. Currently, it is mainly prepared by alkali absorption. The mixture of sodium sulfite and sodium chloride, but there is a big problem in market sales, and because ...

Claims

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