Processes for the production of methyl dithiocarbazinate
US6545172B1 · kind B1 · utility
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26Claims
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Key dates
| Filing date | Apr 18, 2002 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Apr 18, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C337/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of methyl dithiocarbazinate includes the steps of providing a mixture comprising hydrazine, solvent, carbon disulfide and base; adding methyl bromide to the mixture; cooling the reaction mixture; and recovering methyl dithiocarbazinate. The methyl dithiocarbazinate may be recovered by filtering the reaction mixture to yield a solid methyl dithiocarbazinate retentate and a liquid filtrate; acidifying the filterate with a mineral acid; and adding methyl isobutylketone to the acidified filterate.
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