公开(公告)号：CA1223886A

公开(公告)日：1987-07-07

申请号：CA449824

申请日：1984-03-16

Applicant: DEGUSSA

Inventor： KARRENBAUER MICHAEL ,  KLEEMANN AXEL ,  LUESSLING THEODOR ,  SCHAEFER FRITZ

IPC: C07C319/24 ,  C07C67/00 ,  C07C313/00 ,  C07C323/58 ,  C07C149/243

Abstract: D,L-homocystine is produced by mixing an aqueous solution of the disodium salt of D,L-homocysteine having a concentration of between 0.4 and 1.6 moles per litre and an initial pH of between 7.0 and 8.0 with at least the equivalent amount of an aqueous hydrogen peroxide solution and on completed oxidation the pH is adjusted to approximately 5.3. The hydrogen peroxide solution can be applied in a concentration of between 20 and 60 percent by weight.

公开(公告)号：CA1223887A

公开(公告)日：1987-07-07

申请号：CA449825

申请日：1984-03-16

Applicant: DEGUSSA

Inventor： KARRENBAUER MICHAEL ,  KLEEMANN AXEL ,  LUESSLING THEODOR ,  SCHAEFER FRITZ

IPC: C07C319/24 ,  C07C67/00 ,  C07C313/00 ,  C07C323/58 ,  C07C149/243

Abstract: D,L-homocystine is produced by injecting molecular oxygen into an aqueous solution of the disodium salt of D,L-homocysteine having a concentration of between 0.8 and 1.2 moles per litre and an initial pH of between 7.0 and 8.0 in the presence of catalytic amounts of ions of a heavy metal, which can be in several valence stages, until an increase in the pH value can no longer be observed and the pH is subsequently adjusted to approximately 5.3 while stirring. Suitable heavy metal ions are particularly Fe3+ or Cu2+ ions.