Methionine process
US4259525A · kind A · utility
1Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Oct 1, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methionine is prepared from 5-(beta-methylmercaptoethyl)-hydantoin at atmospheric pressure by refluxing the hydantoin with a metal hydroxide such as sodium hydroxide, potassium hydroxide, or barium hydroxide and an alkanol having a boiling point of from about 125.degree. C. to about 230.degree. C. at atmospheric pressure, preferably, a water saturated alkanol having a boiling point of from about 125.degree. C. to about 230.degree. C. at atmospheric pressure and thereafter recovering methionine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.