Process for the production of thiocarbohydrazide
US4943660A · kind A · utility
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8Claims
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Key dates
| Filing date | Mar 17, 1989 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Mar 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C337/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Thiocarbohydrazide (TCH) is made by reacting carbon disulfide and hydrazine in the presence of a mercaptan at an elevated temperature. The TCH is removed from the reaction mixture, the mother liquor is further treated to form HDTC which is further reacted to form TCH and the mother liquor is recycled. A major advantage of this process is the recyclability of the mother liquor without reduction in TCH yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.