公开(公告)号：DE3415141A1

公开(公告)日：1985-10-31

申请号：DE3415141

申请日：1984-04-21

Applicant: BASF AG

Inventor： BERNING WILFRIED DR ,  SIEGEL HARDO DR ,  HEIDA BERND ,  WICKENHAEUSER GERHARD DR

IPC: B01D11/04 ,  B01D11/02 ,  C07C51/00 ,  C07C51/48 ,  C07C59/08 ,  C07C67/00 ,  C12P7/56 ,  C07C51/493 ,  C07C69/68

公开(公告)号：DE3576526D1

公开(公告)日：1990-04-19

申请号：DE3576526

申请日：1985-04-02

Applicant: BASF AG

Inventor： BERNING WILFRIED DR ,  SIEGEL HARDO DR ,  HEIDA BERND ,  WICKENHAEUSER GERHARD DR

IPC: B01D11/04 ,  B01D11/02 ,  C07C51/00 ,  C07C51/48 ,  C07C59/08 ,  C07C67/00 ,  C12P7/56

公开(公告)号：DE3063972D1

公开(公告)日：1983-08-04

申请号：DE3063972

申请日：1980-07-17

Applicant: BASF AG

Inventor： HUPFER LEOPOLD DR ,  GRAF FRITZ DR ,  EBERHARD PETER DR ,  WICKENHAEUSER GERHARD DR ,  SCHLUETER LOTHAR DR

IPC: C07D233/58 ,  C07D233/54

公开(公告)号：DE3334863A1

公开(公告)日：1985-04-11

申请号：DE3334863

申请日：1983-09-27

Applicant: BASF AG

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

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

Abstract: Process for obtaining aqueous glyoxylic acid solutions which are essentially free from other acids, from aqueous solutions which furthermore contain other acids, by mixing the aqueous solution with an organic nitrogen compound at temperatures of up to 50 DEG C, separating the phases and extracting the glyoxylic acid from the organic phase at a higher temperature using water.

公开(公告)号：DE3161347D1

公开(公告)日：1983-12-15

申请号：DE3161347

申请日：1981-03-04

Applicant: BASF AG

Inventor： GRASER FRITZ DR ,  WICKENHAEUSER GERHARD DR

IPC: C09B67/06 ,  F26B7/00

Abstract: A process for drying finely divided pigments contained in a press cake or a suspension, wherein a mixture of the pigment and a liquid whose critical temperature is below the decomposition temperature of the pigment is heated under pressure to above the critical temperature of the liquid and is then released while keeping the temperature above the dew line of the liquid. The process gives fine pigments powders which are easily dispersible in the media in which pigments are used, and which produce deep, brilliant colorations.

公开(公告)号：DE3447615A1

公开(公告)日：1985-07-11

申请号：DE3447615

申请日：1984-12-28

Applicant: BASF AG

Inventor： HUCHLER OTTO HERMANN DR ,  WICKENHAEUSER GERHARD DR ,  AUER HEINZ

IPC: C07C29/82 ,  C07C29/17 ,  C07C31/10 ,  C07C31/12 ,  C07C31/20

Abstract: Process for dehydrating a propanol/butanol mixture by a two-step distillation with the aid of cyclohexane, in which the distillates of both steps are subjected to phase separation, the water-containing organic phase from the phase separation of the first distillation step is combined with the water-containing organic phase from the phase separation of the second distillation step, the organic phase which forms from the mixture by renewed elimination of water and which has a reduced water content is fed into the second distillation step, the aqueous phases are fed into the first distillation step, and the dehydrated mixture of propanol and butanol is withdrawn from the second distillation step as bottom product.

公开(公告)号：DE3166764D1

公开(公告)日：1984-11-29

申请号：DE3166764

申请日：1981-03-04

Applicant: BASF AG

Inventor： GRASER FRITZ DR ,  WICKENHAEUSER GERHARD DR

IPC: C09B67/02 ,  C09B67/10 ,  C09B67/54

公开(公告)号：DE3402733A1

公开(公告)日：1984-08-02

申请号：DE3402733

申请日：1984-01-27

Applicant: BASF AG

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

IPC: C07C45/80 ,  C07C47/127 ,  C07C45/78

Abstract: Process for the purification of aqueous glyoxal solutions which contain acids, by treatment with a solution which contains 20 to 60% by weight of a tertiary amine and 80 to 40% by weight of an alcohol which is not miscible with water at any desired ratio, the treatment being carried out by mixing the two solutions at residence times of less than 5 minutes.