公开(公告)号：DE3785814D1

公开(公告)日：1993-06-17

申请号：DE3785814

申请日：1987-08-29

Applicant: BASF AG

Inventor： VOSS HARTWIG DR ,  BRUECKEN THOMAS DR

IPC: C25D13/24

Abstract: Removal of acids from cathodic electro-deposition (CED) baths, in which an electroconductive substrates are coated with cationic resins, in the form of aq. dispersions, (pt. of) the bath is subjected to ultrafiltration, using a membrane which retains the resin and yields an ultrafiltrate contg. water, solvent, low mol. substances and ions and (pt. of) the ultrafiltrate is recycled to the CED bath. The novel features are that (a) (pt. of) the ultrafiltrate, before recirculation to the CED bath, and (b) an aq. soln. of an organic or inorg. base, opt. contg. salts, are each supplied to exchange cells with an anion exchange membrane as separator and solns. (a) and (b) are passed by the surface of the membrane.

公开(公告)号：DE59001082D1

公开(公告)日：1993-05-06

申请号：DE59001082

申请日：1990-01-03

Applicant: BASF AG

Inventor： STEINIGER MICHAEL DR ,  VOSS HARTWIG DR ,  HUPFER LEOPOLD DR

IPC: B01D61/24 ,  B01D61/44 ,  C07C45/00 ,  C07C45/28 ,  C07C45/78 ,  C07C45/80 ,  C07C47/127

Abstract: Method of purification of aqueous glyoxal solutions which contain organic acids by means of a membrane cell consisting of at least two chambers, in which the glyoxal solution is passed through at least one of the chambers of the cells, which is separated from the adjacent chamber(s) by an anion exchanger cell and where the aqueous solution of a base is passed through at least one of the adjacent chambers.

公开(公告)号：DE4026787A1

公开(公告)日：1992-02-27

申请号：DE4026787

申请日：1990-08-24

Applicant: BASF AG

Inventor： DOBLER WALTER DR ,  VOSS HARTWIG DR ,  BALKENHOHL FRIEDHELM DR ,  PAUST JOACHIM DR

IPC: C07F9/09 ,  B01D61/44 ,  C07D307/62 ,  C07F9/655

Abstract: The invention relates to the preparation of potassium magnesium L-ascorbate-2-phosphate from an aqueous potassium L-ascorbate-2- phosphate solution which is highly contaminated with KCl, as is obtained in the phosphorylation of 5,6-isopropylidene-L-ascorbic acid, by treating the solution with approximately 1 equivalent of magnesium ions per equivalent of L-ascorbate-2-phosphate, followed by removal of the KCl by means of electrodialysis. The process product is a novel L-ascorbate-2-phosphate salt which has very advantageous handling properties.

公开(公告)号：MY135832A

公开(公告)日：2008-07-31

申请号：MYPI20041926

申请日：2004-05-20

Applicant: BASF AG

Inventor： STUER WOLFRAM DR ,  SCHEIDEL JENS DR ,  VOSS HARTWIG DR ,  BASSLER PETER DR ,  ROEPER MICHAEL PROF DR

IPC: C07C67/347 ,  C07C51/353 ,  C07C51/36 ,  C07C51/47 ,  C07C67/303 ,  C07C67/56

Abstract: A PROCESS FOR CONTINUOUSLY PREPARING A COMPOUND WHICH BEARS AT LEAST TWO FUNCTIONAL GROUPS WHICH ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF NITRILE GROUP, CARBOXYLIC ACID GROUP, CARBOXYLIC ESTER GROUP AND CARBOXAMIDE GROUP, COMPRISING THE STEPS OF A) ADDING TWO TERMINAL OLEFINS WHICH BEAR THE FUNCTIONAL GROUPS REQUIRED TO PREPARE THE COMPOUND AS PER A1) CONTAINING AT LEAST TWO FUNCTIONAL GROUPS, IN THE PRESENCE OF A COMPOUND AS PER A3) WHCH IS SUITABLE AS A CATALYST FOR THIS ADDITION AND IS HOMOGENEOUS WITH RESPECT TO THE REACTION MIXTURE TO OBTAIN A MIXTURE COMPRISING A1)A COMPOUND WHICH IS OBTAINED BY MONOADDITION OF THE TWO TERMINAL OLEFINS MENTIONED AND BEARS AT LEAST TWO FUNCTIONAL GROUPS WHICH ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF NITRILE GROUP, CARBOXYLIC ACID GROUP, CARBOXYLIC ESTER GROUP AND CARBOXAMIDE GROUP, A2) A COMPOUND WHICH IS OBTAINED BY POLYADDITION OF THE TWO TERMINAL OLEFINS MENTIONED AND A3) THE COMPOUND WHICH IS SUITABLE AS A CATALYST FOR THIS ADDITION AND IS HOMOGENEOUS WITH RESPECT TO THE REACTION MIXTURE, B) DISTILLING THE MIXTURE OBTAINED IN STEP A) TO OBTAIN B1) THE COMPOUND WHICH IS OBTAINED BY MONOADDITION OF THE TWO TERMINAL OLEFINS MENTIONED AND BEARS AT LEAST TWO FUNCTIONAL GROUPS WHICH ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF NITRILE GROUP, CARBOXYLIC ACID GROUP, CARBOXYLIC ESTER GROUP AND CARBOXAMIDE GROUP, AS THE TOP PRODUCT AND B2) A MIXTURE COMPRISING B2A)A COMPOUND WHICH IS OBTAINED BY MONOADDITION OF THE TWO TERMINALS OLEFINS MENTIONED AND BEARS AT LEAST TWO FUNCTIONAL GROUPS WHICH ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF NITRILE GROUP, CARBOXYLIC ACID GROUP, CARBOXYLIC ESTER GROUP AND CARBOXAMIDE GROUP, B2B) A COMPOUND WHICH IS OBTAINED BY POLYADDITION OF THE TWO TERMINAL OLEFINS MENTIONED AND B2C) THE COMPOUND WHICH IS SUITABLE AS A CATALYST FOR THIS ADDITION AND IS HOMOGENEOUS WITH RESPECT TO THE REACTION MIXTURE, C) SEPARATING THE ENTIRE MIXTURE OBTAINED IN STEP B2) OR A PORTION THREOF BY MEANS OF A SEMIPERMEABLE MEMBRANE TO OBTAIN A PERMEATE AND A RETENTATE, IN SUCH A WAY THAT THE WEIGHT RATION OF COMPONENT B2B) TO COMPONENT B2C) IN THE MIXTURE B2) FED IN STEP C) IS SMALLER THAN IN THE RETENTATE, D) RECYCLING THE PERMEATE OBTAINED IN STEP B2) PARTLY OR FULLY INTO STEP A) AND E) RECYCLING THE PORTION OF THE MIXTURE OBTAINED IN STEP B2) WHICH HAS NOT BEEN SEPARATED IN C) PARTLY OR FULLY INTO STEP A).

公开(公告)号：DE59106850D1

公开(公告)日：1995-12-14

申请号：DE59106850

申请日：1991-08-16

Applicant: BASF AG

Inventor： DOBLER WALTER DR ,  VOSS HARTWIG DR ,  BALKENHOHL FRIEDHELM DR ,  PAUST JOACHIM DR

IPC: C07F9/09 ,  B01D61/44 ,  C07D307/62 ,  C07F9/655

Abstract: The invention relates to the preparation of potassium magnesium L-ascorbate-2-phosphate from an aqueous potassium L-ascorbate-2- phosphate solution which is highly contaminated with KCl, as is obtained in the phosphorylation of 5,6-isopropylidene-L-ascorbic acid, by treating the solution with approximately 1 equivalent of magnesium ions per equivalent of L-ascorbate-2-phosphate, followed by removal of the KCl by means of electrodialysis. The process product is a novel L-ascorbate-2-phosphate salt which has very advantageous handling properties.

公开(公告)号：AT88511T

公开(公告)日：1993-05-15

申请号：AT87117948

申请日：1987-12-04

Applicant: BASF AG

Inventor： VOSS HARTWIG DR ,  BRUECKEN THOMAS DR

IPC: B01D61/44 ,  C25D13/24

公开(公告)号：DE3831848A1

公开(公告)日：1990-03-29

申请号：DE3831848

申请日：1988-09-20

Applicant: BASF AG

Inventor： VOSS HARTWIG DR

IPC: B01D61/52 ,  B01D57/02 ,  B01D61/44 ,  C02F1/469 ,  C09B67/54

公开(公告)号：DE3740785A1

公开(公告)日：1989-06-15

申请号：DE3740785

申请日：1987-12-02

Applicant: BASF AG

Inventor： VOSS HARTWIG DR ,  BRUECKEN THOMAS DR

IPC: C25D13/24

Abstract: Removal of acid from cataphoretic painting baths in which electrically conducting substrates are coated with cationic resins in the form of aqueous dispersions, at least some of the cataphoretic painting bath being subjected to ultrafiltration in which the ultrafiltration membrane retains the cationic resin and an ultrafiltrate is formed which contains water, solvent, low-molecular-weight substances and ions and at least some of the ultrafiltrate (2) being fed back to the cataphoretic painting bath by subjecting at least some of the ultrafiltrate to a special electrodialysis before returning it to the painting bath.

公开(公告)号：DE3514348A1

公开(公告)日：1986-10-23

申请号：DE3514348

申请日：1985-04-20

Applicant: BASF AG

Inventor： PUETTER HERMANN DR ,  VOSS HARTWIG DR

IPC: B01D61/24 ,  B01J47/12 ,  C07B31/00 ,  C07B41/08 ,  C07B63/02 ,  C07C51/00 ,  C07C51/02 ,  C07C59/265 ,  C07C67/00 ,  C07C227/00 ,  C07C227/18 ,  C07C229/00 ,  C07C229/08 ,  C07C229/16 ,  C07C303/00 ,  C07C87/30 ,  C07C101/12 ,  C07C101/04

Abstract: Aqueous solutions of organic acids or bases are obtained by a process in which (a) an aqueous solution of a salt of an organic acid or of an organic base and (b) respectively, an aqueous solution of an inorganic base or of an inorganic acid are each passed into compartments of an exchange cell which are separated from one another by an ion exchange membrane, and the solution (a) and (b) are transported past the surface of the membrane.

公开(公告)号：DE4327361A1

公开(公告)日：1995-02-16

申请号：DE4327361

申请日：1993-08-14

Applicant: BASF AG

Inventor： HERMELING DIETER DR ,  HANNEBAUM HEINZ ,  VOSS HARTWIG DR ,  WEIPER-IDELMANN ANDREAS DR

IPC: C07C41/50 ,  C07C43/307 ,  C25B3/23 ,  C07C43/30

Abstract: This invention is for the preparation of benzaldehyde dialkyl acetals of the general formula I in which R is C1-C6-alkyl and R is C1-C6-alkyl, C1-C6 -alkoxy, halogen, cyano or carboxyalkyl having from 1 to 6 carbon atoms in the alkyl group, and n is an integer from 1 to 3 and the radicals R , in the case of n > 1, can be identical or different, by electrochemical oxidation of substituted toluene compounds of the general formula II by oxidizing a substituted toluene compound II in the presence of an alkanol R -OH and an auxiliary electrolyte (supporting electrolyte) in an electrolytic cell, depressurising the reaction solution thus obtained, outside the electrolytic cell, to a pressure which is lower than the pressure in the electrolytic cell by from 10 mbar to 10 bar, and A) in the case of discontinuous operation, separating the gas liberated during expansion from the reaction solution, recycling the reaction solution into the electrolytic cell at least once, electrolysing, depressurising and separating from the liberated gas, and finally working up to give the product, or B) in the case of continuous operation, working up part of the reaction solution to give the product, admixing the remaining part of the reaction solution with such an amount of the originally employed reaction solution as corresponds to the part drawn off, recycling into the electrolytic cell, electrolysing and depressurising.