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公开(公告)号:DE4140086C2
公开(公告)日:1994-08-25
申请号:DE4140086
申请日:1991-12-05
Applicant: BASF AG
Inventor: DETERING JUERGEN DR , VOSS HARTWIG DR
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公开(公告)号:DE3620013A1
公开(公告)日:1987-12-17
申请号:DE3620013
申请日:1986-06-13
Applicant: BASF AG
Inventor: STEINIGER MICHAEL DR , VOSS HARTWIG DR
IPC: C25B3/23 , C25B3/02 , C07C59/125
Abstract: Manufacture of alkoxyacetic acids of the formula ROCH2COOH (I) in which R denotes an alkyl radical, by electrolytic oxidation of alkoxy ethanols of the formula ROCH2CH2OH (II) in the presence of an electrochemically regeneratable redox catalyst.
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公开(公告)号:DE4342668A1
公开(公告)日:1995-06-22
申请号:DE4342668
申请日:1993-12-15
Applicant: BASF AG
Inventor: VOSS HARTWIG DR
IPC: B01D61/44 , C07C51/02 , C07C227/40 , C07C229/16 , C07C229/24 , C25B3/00 , C07C229/04 , B01D61/42 , C07C227/14 , C07C227/38 , C07C229/26
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公开(公告)号:DE3676541D1
公开(公告)日:1991-02-07
申请号:DE3676541
申请日:1986-04-17
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
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.
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公开(公告)号:DE3900379A1
公开(公告)日:1990-07-12
申请号:DE3900379
申请日:1989-01-09
Applicant: BASF AG
Inventor: STEINIGER MICHAEL DR , VOSS HARTWIG DR , HUPFER LEOPOLD DR
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.
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公开(公告)号:DE3642164A1
公开(公告)日:1988-06-23
申请号:DE3642164
申请日:1986-12-10
Applicant: BASF AG
Inventor: VOSS HARTWIG DR , BRUECKEN THOMAS DR
Abstract: Acid is removed from cathodic electrocoating baths by a process in which electroconductive substrates are coated with cationic resins present in the form of aqueous dispersions, at least a portion of the coating bath being subjected to an ultrafiltration where the ultrafiltration membrane retains the cationic resin to form an ultrafiltrate which contains water, solvent, low molecular weight substances and ions and at least a portion of the ultrafiltrate is recycled into the coating bath, and at least a portion of the ultrafiltrate is subjected to a special electrodialysis treatment before being returned into the electrocoating bath.
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公开(公告)号:DE59400935D1
公开(公告)日:1996-12-05
申请号:DE59400935
申请日:1994-08-08
Applicant: BASF AG
Inventor: HERMELING DIETER DR , HANNEBAUM HEINZ , VOSS HARTWIG DR , WEIPER-IDELMANN ANDREAS DR
IPC: C07C41/50 , C07C43/307 , C25B3/23 , C25B3/02
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.
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公开(公告)号:DE4325455A1
公开(公告)日:1995-02-02
申请号:DE4325455
申请日:1993-07-29
Applicant: BASF AG
Inventor: BAUER GERHARD DR , BAUMSTARK ROLAND DR , BOTT KASPAR DR , VOSS HARTWIG DR
IPC: C07C239/20 , C08K5/32 , C25B3/00 , B01D61/42 , C09D157/10 , C09D201/06 , C09J157/10 , C09J201/06 , C09K3/10
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公开(公告)号:DE4219757A1
公开(公告)日:1993-12-23
申请号:DE4219757
申请日:1992-06-17
Applicant: BASF AG
Inventor: SEELIGER URSULA DR , MUELLER WOLFGANG DR , HEIMANN FRANK DR , HUBER GUENTHER , HABERMANN WOLFGANG , VOSS HARTWIG DR , SIEGEL HARDO DR
IPC: B01D61/44 , B01D61/52 , C07C27/00 , C07C51/02 , C07C51/06 , C07C51/09 , C07C55/14 , C07C209/62 , C07C211/12 , C08G69/48 , C25B3/00 , C07C55/02 , C07C211/09
Abstract: Disclosed is a method for the simultaneous preparation of dicarboxylic acids and diamines from (a) polymers based on polyamides made by reacting dicarboxylic acids or derivatives thereof with diamines or (b) compounds containing essentially such polymers by decomposing these polymers into their constituent monomers by treating the polymers or compounds with a base and subsequently converting electrochemically the dicarboxylic-acid salts thus produced into the corresponding dicarboxylic acids and bases.
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公开(公告)号:DE4219756A1
公开(公告)日:1993-12-23
申请号:DE4219756
申请日:1992-06-17
Applicant: BASF AG
Inventor: SEELIGER URSULA DR , MUELLER WOLFGANG DR , HEIMANN FRANK DR , HUBER GUNTHER , HABERMANN WOLFGANG , VOSS HARTWIG DR , SIEGEL HARDO DR
IPC: B01D61/44 , B01D61/52 , C07C51/06 , C07C51/09 , C07C51/43 , C07C55/14 , C07C209/62 , C07C211/12 , C08G69/28 , C08G69/48 , C08J11/16 , C25B3/00 , C07C55/02 , C07C211/09
Abstract: Disclosed is a method for the simultaneous preparation of dicarboxylic acids and diamines from (a) polymers based on polyamides made by reacting dicarboxylic acids or derivatives thereof with diamines or (b) compounds containing essentially such polymers, by decomposing these polymers into their constituent monomers by treating the polymers or compounds with a base in an alcoholic solution and subsequently converting electrochemically the dicarboxylic-acid salts thus produced into the corresponding dicarboxylic acids and bases.
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