Patent · US Expired

Process for the production of aqueous sodium methioninate solutions

US4391987A · kind A · utility

1Cited by

3References

10Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Manfred Spindler
Herbert Tanner
Friedhelm Geiger · Bethlehem, US
Friedrich Bittner · Bad Soden, DE
Jurgen Martens · Alzenau, DE

Key dates

Filing date	Feb 10, 1982
Grant date	Jul 5, 1983
Priority date	—
Expiry date	Feb 10, 2002

Classification

Technology area (CPC A)Human Necessities
CPC primaryA23K20/142
WIPO fieldFood chemistry
WIPO sectorChemistry

Abstract

Aqueous sodium methioninate solutions having a low content of sodium carbonate can be recovered from the crude hydrolysis mixture resulting from the saponification of 5-(.beta.-methylmercaptoethyl)hydantoin with 1.1 to 6 equivalents of sodium hydroxide and/or sodium carbonate by cooling the crude hydrolysis mixture to a temperature below 10.degree. C., separating off the precipitated sodium carbonate and concentrating the sodium methioninate solution remaining to 40 to 65 weight percent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.