Continuous process for the manufacture of methionine
US4069251A · kind A · utility
16Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Aug 12, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D233/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a continuous process 5-(.beta.-methylmercaptoethyl)-hydantoin is subjected to hydrolysis at an elevated temperature and elevated pressure in an aqueous solution of alkali carbonate or alkali bicarbonate or a mixture of these two compounds. The ammonia and carbon dioxide which form during the hydrolysis are removed and when the hydrolysis is complete the methionine is separated by means of carbon dioxide and the mother liquor is recirculated into the process after replenishing with fresh amounts of said hydantoin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.