Process for the production of thiocarbohydrazide
US4940815A · kind A · utility
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4References
10Claims
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Key dates
| Filing date | Mar 17, 1989 |
| Grant date | Jul 10, 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
TCH is produced in two stages. In the first stage, carbon disulfide and excess hydrazine are reacted in the presence of a mercaptan and optionally a strong base or an amine other than hydrazine. Carbon disulfide and a strong base (if none was present during the first stage) are then added to the reaction mixture which is further reacted to complete the formation of TCH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.