151900-44-6Relevant articles and documents
Preparation method of rubber aid 1,6-bis(N,N-dibenzyl carbamyl disulfide) hexane
-
Paragraph 0022; 0024; 0025; 0026; 0028; 0030; 0031; 0033, (2020/06/09)
The invention provides a preparation method of a rubber aid 1,6-bis(N,N-dibenzyl carbamyl disulfide) hexane. According to the method, 1,6-dimercaptohexane is used as a raw material and reacts with hydrogen peroxide to form 1,2-dithiocyclooctane, then the 1,2-dithiocyclooctane reacts with chlorine to form 1,6-secondary sulfonyl chloride octane, and the 1,6-secondary sulfonyl chloride octane reactswith dibenzyl dithiocarbamate to form a final product. The synthesis process is simple and easy to operate, the reaction time is shortened, and the production efficiency and the yield are improved. According to the method, no toxic and harmful substance formaldehyde is used, no 1,6-dithiosulfo hexane disodium salt hydrate is used, a large amount of organic wastewater containing inorganic salt is reduced, the used solvent can be reused after simple treatment, and the process is clean and environmentally friendly.
A thiocarbamic acid derivatives and method for preparing same
-
Paragraph 0037-0040, (2017/02/09)
The invention provides a preparation method, which is simple in operation and is green and environment-friendly, for preparing a thiocarbamic acid derivative. According to the preparation method, organic thiosulfate and sodium thiocarbamate are used as raw materials, dichloromethane and formaldehyde can be added during reaction to accelerate the reaction, suction filtration is performed after reaction to separate out a solid product, and the filtrate can be recycled to continuously prepare the thiocarbamic acid derivative. The boiling point of the dichloromethane added during the reaction is low, so that the reaction temperature can be reduced, the energy consumption is reduced, and the dichloromethane is difficult to burn to ensure that the safety performance during production is improved.
Preparation of derivatized dithiols
-
Page/Page column 6-7, (2010/02/14)
The invention relates to a process for preparing dithiols derivatized with dithiocarbamic acids, in which the derivatized dithiols are obtained in high yield and purity.