Patent · US Expired

Process for the production of aqueous sodium methioninate solutions

US4391988A · kind A · utility

2Cited by

3References

6Claims

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 distilling off the water from the crude hydrolysis mixture until the sodium methioninate content is 40 to 65 weight percent, and after cooling to at most room temperature separating off the precipitated sodium carbonate.

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