Method of making 1,1,1,2,3-pentachloropropane
US10017436B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2018 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Mar 26, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/25
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a method of making 1,1,1,2,3-pentachloropropane comprising: (1) utilizing 1,1,1,3-tetrachloropropane as a raw material and 1,1,1,2,3-pentachloropropane as a solvent to carry out a dehydrochlorination reaction to obtain 1,1,3-trichloropropene, and after the reaction, (2) introducing chlorine gas into the reaction system to carry out a chlorination reaction to obtain 1,1,1,2,3-pentachloropropane. In the present invention, 1,1,1,2,3-pentachloropropane acts as a solvent or a diluent, and may act as an inhibitor to prevent the production of high-boiling residues such as dimers, oligomers or polymers during the dehydrochlorination process. Then, the conversion rate of 1,1,1,3-tetrachloropropane is increased, and consequently, the yield of final product 1,1,1,2,3-pentachloropropane is also increased. The preparation method of the present invention can be used in an batch reaction mode, and can also be used in a continuous reaction process, and is suitable for industrial production, thus having a wide range of possible applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.