- Preparation method of rubber aid 1,6-bis(N,N-dibenzyl carbamyl disulfide) hexane
-
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.
- -
-
Paragraph 0022; 0024; 0025; 0026; 0028; 0030; 0031; 0033
(2020/06/09)
-
- A thiocarbamic acid derivatives and method for preparing same
-
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.
- -
-
Paragraph 0037-0040
(2017/02/09)
-
- An environment-friendly, high-efficient sulfur cross-linking agent 1,6-bis (N, N-dibenzyl carbamoyl dpds) hexane preparation method (by machine translation)
-
The invention relates to an environment-friendly, high-efficient sulfur cross-linking agent 1,6-bis (N, N-dibenzyl carbamoyl dpds) hexane preparation method comprises the steps of: first synthesis of dibenzyl sodium dithiaamino formate, then with 1,6- two hexyl chloride reaction, generating 1,6-bis (N, N-dibenzyl carbamoyl a sulfur) hexane, the composition and sulfur reaction generation product, 1,6-bis (N, N-dibenzyl thio carbamyl dpds) hexane. The product prepared in this invention containing inorganic salt is less, high purity, and the present invention provides method for the preparation of simple and easy, green, generated in the process of preparing the waste water is less, reduce the pollution of the environment. (by machine translation)
- -
-
Paragraph 0021; 0031
(2017/01/02)
-
- Preparation of derivatized dithiols
-
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.
- -
-
Page/Page column 6
(2010/02/14)
-
- Preparation of dithiol derivatives
-
Preparation of dithiol derivatives (I) comprises reaction of dithiocarbamide acid compounds (II) with metallic sulfide compounds (III) in the presence of water, carbonyl compounds and organic solvents in a pH value of 7-14 at 0-90[deg]C to yield at least
- -
-
Page/Page column 8
(2010/02/14)
-
- Preparation of thiosulphuric acid derivatives
-
The invention relates to a novel process for preparing salts of S-alkyl esters of thiosulphuric acid by reacting organic dihalides with thiosulphates in water.
- -
-
Page/Page column 3
(2008/06/13)
-