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:
Dec. 20, 1977
Filed:
Oct. 12, 1976
Yves Labat, Pau, FR;
Aristide Boy, Pau, FR;
Produits Chimiques Du Bearn, Pau, FR;
Abstract
In a process for preparing alpha-amino-gamma-methylmercaptobutyronitrile by aminating, by means of ammonia, alpha-hydroxy-gamma-methylmercaptobutyronitrile at a temperature of 50.degree. C to 100.degree. C, the ammonia is accompanied by an amount of water corresponding to at least 1 mole per mole of ammonia. The molar NH.sub.3 /cyanhydrine ratio in the reaction medium is 2 to 10, and preferably 4 to 7, the H.sub.2 O/cyanhydrine ratio in the reaction medium is 4 to 20, and preferably 5 to 16, while H.sub.2 O/NH.sub.3 ratio is 1 to 3, and preferably 1.3 to 2. Advantageously the reaction medium is introduced into a piston-type tubular reactor which is maintained at a constant temperature, the dwelling time of the mixture in the heated zone being 1 to 30 minutes, and preferably 2 to 25 minutes, and the reaction medium is maintained under a pressure of 1 to 10 bars, and preferably a 4 to 8 bars.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile