公开(公告)号：MX7080E

公开(公告)日：1987-05-12

申请号：MX937081

申请日：1981-03-23

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  LEHMANN BERND ,  KLENK HERBERT

IPC: C07D307/40 ,  C07D333/12 ,  C07C121/34

公开(公告)号：FR2499560A1

公开(公告)日：1982-08-13

申请号：FR8202002

申请日：1982-02-08

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  LEHMANN BERND ,  MARTENS JURGEN

IPC: C07C227/24 ,  C07C229/00 ,  C07C229/02 ,  C07D207/16 ,  C07D209/20 ,  C07D211/60 ,  C07C99/08 ,  C07C101/04 ,  C07C101/20 ,  C07C101/72

Abstract: Aqueous solutions of sodium salts of alpha -aminocarboxylic acids practically free of foreign salts are produced by saponifying the corresponding hydantoin at a temperature between 110 DEG C. and 180 DEG C. with a mixture, in each case based on the hydantoin, of 1 equivalent of sodium hydroxide and 2 equivalents of calcium oxide or hydroxide, separating off the precipitated calcium carbonate after the end of the saponification and concentrating the aqueous sodium salt solution remaining to drive off the ammonia contained therein.

公开(公告)号：CA1148544A

公开(公告)日：1983-06-21

申请号：CA378552

申请日：1981-05-28

Applicant: DEGUSSA

Inventor： KLEEMANNN AXEL ,  LEHMANN BERND ,  KLENK HERBERT

IPC: C07D253/06 ,  C07D253/075

Abstract: 4-Amino-6-tert.butyl-3-mercapto-1,2,4-triazin-5-one having the formula (I) is produced by reacting pivaloyl cyanide and isobutene in the presence of acetic acid and sulphuric acid, hydrolyzing the reaction mixture in the presence of water and reacting the formed trimethyl pyroracemic acid with thiocarbohydrizide. The triazinone is an important intermediate product in the synthesis of the known herbicide 4-amino-6-tert.butyl-3-methyl-mercapto-1,2,4-triazin-5-one.

公开(公告)号：MX6995E

公开(公告)日：1987-01-27

申请号：MX991582

申请日：1982-02-11

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  LEHMANN BERND ,  MARTENS JURGEN

IPC: C07C319/20 ,  A23K20/00 ,  A23K20/142 ,  B01J23/04 ,  C07B61/00 ,  C07C67/00 ,  C07C313/00 ,  C07C319/14 ,  C07C323/58 ,  C07C149/247 ,  A23K1/22

公开(公告)号：RO81961A

公开(公告)日：1984-04-02

申请号：RO10377081

申请日：1981-03-20

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  LEHMANN BERND ,  KLENK HERBERT

IPC: B01J31/00 ,  B01J31/02 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C255/02 ,  C07C255/31 ,  C07C255/45 ,  C07C255/56 ,  C07D307/54 ,  C07D333/24 ,  C07C120/04

公开(公告)号：FR2499565A1

公开(公告)日：1982-08-13

申请号：FR8202000

申请日：1982-02-08

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  LEHMANN BERND ,  MARTENS JURGEN

IPC: C07C319/20 ,  A23K20/00 ,  A23K20/142 ,  B01J23/04 ,  C07B61/00 ,  C07C67/00 ,  C07C313/00 ,  C07C319/14 ,  C07C323/58 ,  C07C149/247

Abstract: Aqueous sodium methioninate solutions which are virtually free from foreign salts are prepared by hydrolysing 5-(ss-methylmercaptoethyl)hydantoin with a mixture of 1 equivalent of sodium hydroxide and 2 equivalents of calcium oxide or calcium hydroxide, in each case based on the 5-(ss-methylmercaptoethyl)hydantoin employed, at temperatures between 110 and 180 DEG C, removing, after the hydrolysis has ended, the calcium carbonate which has precipitated and concentrating the remaining aqueous sodium methioninate solution to expel the ammonia which it contains, preferably to a sodium methioninate content of 40 to 65% by weight.