Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-10-12
1977-12-20
Brust, Joseph P.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C12143, C07C12000
Patent
active
040641597
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.
REFERENCES:
patent: 2542768 (1951-02-01), Gresham et al.
patent: 2564105 (1951-08-01), Gresham et al.
patent: 2732400 (1956-01-01), Weiss
patent: 3517048 (1970-06-01), Thoma et al.
Boy Aristide
Labat Yves
Brust Joseph P.
Produits Chimiques Du Bearn
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