The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2000
Filed:
May. 11, 1999
Applicant:
Inventors:
Martin Korfer, Johannesberg, DE;
Lutz Rohland, Offenbach, DE;
Wolfram Binder, Rodenbach, DE;
Hans Joachim Hasselbach, Gelnhausen, DE;
Hans Christian Alt, Gelnhausen-Meerholz, DE;
Klaus Huthmacher, Gelnhausen, DE;
Heidemarie Kniesel, Hosbach, DE;
Assignee:
Degussa-Huls AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A23K / ; C07C / ;
U.S. Cl.
CPC ...
426-2 ; 426807 ; 562559 ;
Abstract
A process for the preparation of aqueous sodium methioninate solutions having a low sodium carbonate content from the crude hydrolysis mixtures obtained in the hydrolysis of 5-(.beta.-methylmercaptoethyl)-hydantoin with from 1.1 to 6 equivalents of sodium hydroxide and/or sodium carbonate, by separating off sodium carbonate monohydrate while heating, and granulates subsequently prepared from those solutions by various processes.