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公开(公告)号：JPH1046381A
公开(公告)日：1998-02-17
申请号：JP13368897
申请日：1997-05-23
Applicant: BASF AG
Inventor： HUBER GUENTHER DIPL ING , WEIPER-IDELMANN ANDREAS DR , KRAMER ANDREAS DR , GOLOMBEK ROLF DR , FREDE MARKUS DR , SPISKE LUISE DR , SCHEHLMANN KARL-HEINZ , STEUER VOLKER
Abstract: PROBLEM TO BE SOLVED: To electrochemically reduce an org. compd. in a high space-time yield by bringing the org. compd. into contact with a conductive substrate and a cathode having a conductive polarized layer formed formed on the substrate by deposition. SOLUTION: Adiponitrile is reduced to hexamethylenediamine in a split electrolytic cell divided into a cathode compartment and an anode compartment with a cation-exchange membrane as a separation medium. In this case, a filter plate covered with the longitudinally diagonal woven fabric of steel alloy is used sa the cathode, a Ti plate coated with a Ta-Ir mixed oxide is used as the anode, and 2% sulfuric acid is employed as the anolyte, and the mixture of methanol, water, NaOH, adiponitrile and Raney nickel as the catholyte. Raney nickel is previously deposited on a cathode and then electrolytically reduced at 30-40 deg.C and 1000A/m current density. NaOH is removed by electrolysis, and the product is separated by distillation to recover hexamethylenediamine.
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公开(公告)号：JP2000313982A
公开(公告)日：2000-11-14
申请号：JP2000074507
申请日：2000-03-16
Applicant: BASF AG
Inventor： PUETTER HERMANN DR , WEIPER-IDELMANN ANDREAS DR , MERK CLAUDIA DR
Abstract: PROBLEM TO BE SOLVED: To enable the use adequate for reaction of an organic compound by coating an electrode with a diamond layer which is poreless. SOLUTION: The material of the substrate of the electrode is preferably one or more among carbide, silicide and boride. The substrate has preferably a core material or an intermediate layer applied on the core material. The core material may be made of graphite or Ti or Mo or Au or their combination. The intermediate layer may be formed of Au or Pt or their mixture. The boron content of the diamond layer is preferably specified to 10 to 2,000 ppm, more preferably 50 to 1,000 ppm. The electrode is produced by cleaning the surface of the substrate, then seeding the surface at a high diamond nucleus forming density and coating the surface with diamond. As a result, the formation of pores in the diamond layer may be prohibited.
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公开(公告)号：DE59501538D1
公开(公告)日：1998-04-09
申请号：DE59501538
申请日：1995-11-07
Applicant: BASF AG
Abstract: Prodn. of a p-hydroxybenzaldehyde of formula (I) comprises electrochemical oxidn. of a phenol of formula (II) in the presence of an alkanol of formula R1OH in the presence of less than the stoichiometric amt. of an organic or inorganic base that can convert (II) to the corresp. phenolate; the reaction mixt. is worked up hydrolytically, and (I) is isolated. R1 = 1-6C alkyl; X = 2-4 inert substits. Pref. (II) has the formula (IIa). R2, R3 = 1-18C alkyl or 1-18C alkoxy, pref. tert. butyl.
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公开(公告)号：DE4440466A1
公开(公告)日：1996-05-23
申请号：DE4440466
申请日：1994-11-15
Applicant: BASF AG
IPC: C25B3/23 , C25B3/02 , C07C47/565
Abstract: Prodn. of a p-hydroxybenzaldehyde of formula (I) comprises electrochemical oxidn. of a phenol of formula (II) in the presence of an alkanol of formula R1OH in the presence of less than the stoichiometric amt. of an organic or inorganic base that can convert (II) to the corresp. phenolate; the reaction mixt. is worked up hydrolytically, and (I) is isolated. R1 = 1-6C alkyl; X = 2-4 inert substits. Pref. (II) has the formula (IIa). R2, R3 = 1-18C alkyl or 1-18C alkoxy, pref. tert. butyl.
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公开(公告)号：ES2209700T3
公开(公告)日：2004-07-01
申请号：ES00104457
申请日：2000-03-06
Applicant: BASF AG , FRAUNHOFER GES FORSCHUNG
Inventor： PUTTER HERMANN DR , WEIPER-IDELMANN ANDREAS DR , MERK CLAUDIA DR , FRYDA MATTHIAS DR , KLAGES CLAUS-PETER DR , SCHAFER LOTHAR DR
Abstract: An electrode, having an applied pore-free diamond layer, is new. Independent claims are also included for the following: (i) production of the above electrode by seeding a cleaned electrode body surface with a high diamond nuclei density prior to coating with diamond; and (ii) electrochemical conversion of organic compounds by contact with the above electrode.
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Patent Agency Ranking
公开(公告)号：DE4315873A1
公开(公告)日：1994-11-17
申请号：DE4315873
申请日：1993-05-12
Applicant: BASF AG
Inventor： SCHLUETER HARALD , SCHMITT MICHAEL DR , SCHNITZER GEORG , SUETSCH FRANZ , WEIPER-IDELMANN ANDREAS DR
Abstract: Dyeing of cellulosic textile material with catalytically hydrogenated leuco indigo by electrochemically reducing the portion of the leuco indigo in the dye liquor which has become oxidised by air contact during dyeing and finishing the dyeing in a conventional manner after the leuco indigo has gone onto the textile material.
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公开(公告)号：AT252167T
公开(公告)日：2003-11-15
申请号：AT00104457
申请日：2000-03-06
Applicant: BASF AG , FRAUNHOFER GES FORSCHUNG
Inventor： PUETTER HERMANN DR , WEIPER-IDELMANN ANDREAS DR , MERK CLAUDIA DR , FRYDA MATTHIAS DR , KLAGES CLAUS-PETER DR , SCHAEFER LOTHAR DR , HAMPEL ALEXANDER
Abstract: An electrode, having an applied pore-free diamond layer, is new. Independent claims are also included for the following: (i) production of the above electrode by seeding a cleaned electrode body surface with a high diamond nuclei density prior to coating with diamond; and (ii) electrochemical conversion of organic compounds by contact with the above electrode.
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公开(公告)号：ES2146438T3
公开(公告)日：2000-08-01
申请号：ES97108224
申请日：1997-05-21
Applicant: BASF AG
Inventor： HUBER GUNTHER , WEIPER-IDELMANN ANDREAS DR , KRAMER ANDREAS DR , GOLOMBEK ROLF DR , FREDE MARKUS DR , SPISKE LUISE DR
Abstract: Electrochemically reducing an organic compound comprises: contacting the compound with a cathode comprising a support of electrically conducting material and an electrically conducting, cathodically polarised layer formed on this by sedimentation in situ.
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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：ES2113150T3
公开(公告)日：1998-04-16
申请号：ES95117495
申请日：1995-11-07
Applicant: BASF AG
Abstract: Prodn. of a p-hydroxybenzaldehyde of formula (I) comprises electrochemical oxidn. of a phenol of formula (II) in the presence of an alkanol of formula R1OH in the presence of less than the stoichiometric amt. of an organic or inorganic base that can convert (II) to the corresp. phenolate; the reaction mixt. is worked up hydrolytically, and (I) is isolated. R1 = 1-6C alkyl; X = 2-4 inert substits. Pref. (II) has the formula (IIa). R2, R3 = 1-18C alkyl or 1-18C alkoxy, pref. tert. butyl.
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