公开(公告)号：FR2540105B1

公开(公告)日：1986-02-14

申请号：FR8400782

申请日：1984-01-19

Applicant: BASF AG

Inventor： WICKENHAEUSER GERHARD ,  HEIDA BERND ,  GRAF FRITZ ,  HUPFER LEOPOLD

IPC: C07C47/127 ,  C07C45/00 ,  C07C45/80 ,  C07C45/85 ,  C07C67/00

Abstract: Aqueous solutions of glyoxal which contain acids are purified by treatment with a solution which contains from 20 to 60% by weight of a tertiary amine and from 80 to 40% by weight of an alcohol which is not infinitely miscible with water, the treatment being carried out by mixing the two solutions during a residence time of less than 5 minutes.

公开(公告)号：FR2552426B1

公开(公告)日：1986-11-28

申请号：FR8414519

申请日：1984-09-21

Applicant: BASF AG

Inventor： WICKENHAEUSER GERHARD ,  HEIDA BERND ,  GRAF FRITZ ,  HUPFER LEOPOLD

IPC: C07C59/153 ,  C07C51/00 ,  C07C51/48 ,  C07C67/00

Abstract: Aqueous glyoxylic acid solutions, essentially free of other acids, are recovered from aqueous solutions which still contain other acids, by a method in which the aqueous solution is mixed with an organic nitrogen compound at as high as 50 DEG C., the phases are separated, and the glyoxylic acid is extracted from the organic phase with water, at a higher temperature.

公开(公告)号：FR2552426A1

公开(公告)日：1985-03-29

申请号：FR8414519

申请日：1984-09-21

Applicant: BASF AG

Inventor： WICKENHAEUSER GERHARD ,  HEIDA BERND ,  GRAF FRITZ ,  HUPFER LEOPOLD

IPC: C07C59/153 ,  C07C51/00 ,  C07C51/48 ,  C07C67/00

Abstract: Aqueous glyoxylic acid solutions, essentially free of other acids, are recovered from aqueous solutions which still contain other acids, by a method in which the aqueous solution is mixed with an organic nitrogen compound at as high as 50 DEG C., the phases are separated, and the glyoxylic acid is extracted from the organic phase with water, at a higher temperature.

公开(公告)号：FR2540105A1

公开(公告)日：1984-08-03

申请号：FR8400782

申请日：1984-01-19

Applicant: BASF AG

Inventor： WICKENHAEUSER GERHARD ,  HEIDA BERND ,  GRAF FRITZ ,  HUPFER LEOPOLD

IPC: C07C47/127 ,  C07C45/00 ,  C07C45/80 ,  C07C45/85 ,  C07C67/00

Abstract: Aqueous solutions of glyoxal which contain acids are purified by treatment with a solution which contains from 20 to 60% by weight of a tertiary amine and from 80 to 40% by weight of an alcohol which is not infinitely miscible with water, the treatment being carried out by mixing the two solutions during a residence time of less than 5 minutes.