Patents by Inventor Klaus Pandl
Klaus Pandl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6471928Abstract: The claimed invention relates to a process for preparing an aqueous formaldehyde solution comprising absorbing a formaldehyde-loaded gas stream, in an absorption zone, in an aqueous solution comprising from 0.000% to 0.01% by weight of a Bronsted base, based on the formaldehyde absorbed. The produced aqueous formaldehyde solution comprises: a) from 10 to 75% by weight of formaldehyde, b) from 0 to 500 ppm by weight of tetroxane, c) from 50 to 400 ppm by weight of formic acid, based on the formaldehyde absorbed, and d) from 0.2 to 5.0% by weight of methanol, based on the formaldehyde absorbed.Type: GrantFiled: April 27, 2001Date of Patent: October 29, 2002Assignee: BASF AktiengesellschaftInventors: Eckehard Danz, Klaus Pandl
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Patent number: 6316676Abstract: The process for the preparation of carbonyl compounds of the formula I where R1 and R2 are a hydrocarbon radical, or R1 and R2 together are an unsubstituted or substituted alkylene group, and X is ═O or two alkoxy groups, comprises oxidizing alcohols of the formula II where R1 to R2 and X are as defined above, with oxygen in the gaseous phase a) at temperatures of from 270 to 600° C. on silver coated catalysts which comprise an abrasion-resistant coating of metallic silver on a core of inert support material, or b) at temperatures of from 450 to 750° C. on silver crystals and/or copper crystals having a particle size of from 0.1 to 2.5 mm for a residence time of at most 0.1 second. Also claimed is an advantageous overall process for the preparation of &agr;-diketones, preferably diacetal, from the corresponding ketone, in particular methyl ethyl ketone, via the carbonyl compounds of the formula I where X is two alkoxy groups.Type: GrantFiled: February 28, 2001Date of Patent: November 13, 2001Assignee: BASF AktiengesellschaftInventors: Werner Aquila, Jörg Botzem, Melanie Brunner, Hartwig Fuchs, Wolfgang Krause, Klaus Pandl, Ulrich Schäfer-Lüderssen
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Patent number: 6242653Abstract: The process for the preparation of carbonyl compounds of the formula I where R1 and R2 are a hydrocarbon radical, or R1 and R2 together are an unsubstituted or substituted alkylene group, and X is=O or two alkoxy groups, comprises oxidizing alcohols of the formula II where R1 to R2 and X are as defined above, with oxygen in the gaseous phase a) at temperatures of from 270 to 600° C. on silver coated catalysts which comprise an abrasion-resistant coating of metallic silver on a core of inert support material, or b) at temperatures of from 450 to 750° C. on silver crystals and/or copper crystals having a particle size of from 0.1 to 2.5 mm for a residence time of at most 0.1 second. Also claimed is an advantageous overall process for the preparation of &agr;-diketones, preferably diacetal, from the corresponding ketone, in particular methyl ethyl ketone, via the carbonyl compounds of the formula I where X is two alkoxy groups.Type: GrantFiled: August 19, 1999Date of Patent: June 5, 2001Assignee: BASF AktiengesellschaftInventors: Werner Aquila, Jörg Botzem, Melanie Brunner, Hartwig Fuchs, Wolfgang Krause, Klaus Pandl, Ulrich Schäfer-Lüderssen
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Patent number: 5391719Abstract: A process for preparing metal aminoformazans by alkaline hydrolysis of the corresponding acylated amino derivates in aqueous medium, is described, the hydrolysis being carried out at from 120.degree. to 170.degree. C. and from 3 to 5 bar in the presence of from 1.5 to 3 mol of an alkali metal hyroxide, based on 1 mol of acylated aminoformazan.Type: GrantFiled: June 23, 1993Date of Patent: February 21, 1995Assignee: BASF AktiengesellschaftInventors: Matthias Wiesenfeldt, Klaus Pandl, Manfred Patsch
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Patent number: 5260431Abstract: Nitroanilinesulfonic acids of the formula ##STR1## where R is C.sub.1 -C.sub.4 -alkyl are prepared by sulfonation of 3-nitro-N-alkylanilines using oleum, and are reduced to 3-(N-alkylamino)aniline-4-sulfonic acids.Type: GrantFiled: August 13, 1992Date of Patent: November 9, 1993Assignee: BASF AktiengesellschaftInventors: Manfred Patsch, Klaus Pandl
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Patent number: 5245020Abstract: Reactive dyes of the formula ##STR1## where l is 0 or 1,n is 0 or 1,E is nitrogen or C--ClA is the radical of an azo dye attached to the triazine ring via an imino or C.sub.1 -C.sub.4 -alkylimido group,B--if E is nitrogen--is the radical of an azo dye or of a formazan dye which in either case is bonded to the triazine ring via an imino of C.sub.1 -C.sub.4 -alkylimino group or else--if n is 0--is fluorine, chlorine or unsubstituted or substituted amino, or--if E is C--Cl--is fluorine, chlorine or methyl,X.sup.1 and X.sup.2 are independently of the other fluorine or chlorine,X.sup.3 is fluorine or chlorine or else--if E is C--Cl--methylsulfonyl andZ.sup.1 and Z.sup.2 are independently of the the other a radical of the formula ##STR2## where L.sup.3 and L.sup.4 are independently of the other hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl,with the proviso that l and n are not simultaneously 0 and that, if E is C--Cl or if n is 0 and Z.sup.1 is the radical of the formula ##STR3## where L.sup.Type: GrantFiled: March 18, 1992Date of Patent: September 14, 1993Assignee: BASF AktiengesellschaftInventors: Joerg L. Jessen, Klaus Pandl, Hermann Loeffler, Bernd Siegel, Manfred Patsch
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Patent number: 5241055Abstract: Reactive dyes useful for dyeing or printing hydroxyl- or nitrogen-containing substrates have the formula ##STR1## where U is vinyl, propenyl or the radical of the formula ##STR2## in which Z.sup.1 is hydrogen or methyl and Z.sup.2 is a group which is detachable under alkaline reaction conditions,X isa) the radical of a chromophore orb) the radical of a coupling component to which may be additionally attached the radical of a diazo component via an azo linkage and which may contain an additional reactive group, andL isa) a bridge member of the formula ##STR3## where Q.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, Q.sup.2 and Q.sup.3 are each independently of the other hydrogen or C.sub.1 -C.sub.4 -alkyl, and Q.sup.4 is a leaving group, orb) an azo linkage,the radical X-L being bonded to the benzene ring meta or para to the CH.sub.2 -SO.sub.3 H group,and their preparation may involve novel benzyl compounds as intermediates.Type: GrantFiled: June 17, 1992Date of Patent: August 31, 1993Assignee: BASF AktiengesellschaftInventors: Claus Marschner, Joerg L. Jessen, Klaus Pandl, Manfred Patsch
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Patent number: 5231171Abstract: Reactive dyes useful for dyeing or printing hydroxyl- or nitrogen-containing substrates have the formula ##STR1## where Rg is a radical of the formula ##STR2## Ar is the radical of a benzene or naphthalene ring, Z.sup.1 and Z.sup.2 are each hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, substituted or unsubstituted phenyl, C.sub.1 -C.sub.4 -alkoxy, carboxyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, cyano, halogen or hydroxysulfonyl,Z.sup.3, Z.sup.4 and Z.sup.5 are each hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl or substituted or unsubstituted phenyl,U is a group which is detachable under alkaline reaction conditions,X is in case a) the radical of a chromophore or in case b) the radical of a coupling component to which may additionally be attached, via an azo bridge, the radical of a diazo component and which may have additional reactive groups, andL is in case a) a bridge member or in case b) an azo bridge.Type: GrantFiled: December 13, 1991Date of Patent: July 27, 1993Assignee: BASF AktiengesellschaftInventors: Claus Marschner, Matthias Niedenbrueck, Bernd Siegel, Manfred Patsch, Klaus Pandl
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Patent number: 5210187Abstract: Double attachment reactive dyes have the formula ##STR1## where U.sup.1 is C.sub.1 -C.sub.4 -alkyl, phenyl, C.sub.2 -C.sub.10 -alkenyl or the radical ##STR2## where Q.sup.1 and Q.sup.2 are each independently of the other hydrogen or C.sub.1 -C.sub.4 -alkyl and Q.sup.3 is a group which is detachable under alkaline reaction conditions,Z is the radical ##STR3## where each Q.sup.4 is independently of the other hydrogen or C.sub.1 -C.sub.4 -alkyl which may be substituted by cyano, U.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, C.sub.2 -C.sub.10 -alkenyl or the radical ##STR4## where Q.sup.5 and Q.sup.6 are each independently of the other hydrogen or C.sub.1 -C.sub.4 -alkyl and Q.sup.7 is a group which is detachable under alkaline reaction conditions, and w is 0, 1 or 2,t is 0, 1 or 2,v is 1 or 2 and X and L are each as defined in the description, with the proviso that at least one of the two radicals U.sup.1 and U.sup.2 is not C.sub.1 -C.sub.Type: GrantFiled: April 9, 1992Date of Patent: May 11, 1993Assignee: BASF AktiengesellschaftInventors: Manfred Patsch, Uwe Nahr, Friedrich Wirsing, Joerg L. Jessen, Klaus Pandl, Claus Marschner, Matthias Dust
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Patent number: 5206426Abstract: Phenylene diamines of the formula ##STR1## in which R.sup.1 denotes hydrogen, formyl or oxalyl,R.sup.2 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl andR.sup.3 denotes hydrogen or C.sub.2 -C.sub.8 -alkanoyl,provided that R.sup.1 and R.sup.2 are not both hydrogen and that when R.sup.2 is methyl or ethyl, R.sup.1 and R.sup.3 are not both hydrogen, and a process for the preparation of phenylene diamines.Type: GrantFiled: December 31, 1991Date of Patent: April 27, 1993Assignee: BASF AktiengesellschaftInventors: Klaus Pandl, Manfred Patsch
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Patent number: 5196573Abstract: A process for the preparation of 4-sulfonated anthranilic acids by sulfonation of ortho-nitrotoluenes with chlorosulfonic acid or oleum followed by oxidation of the methyl group and, finally, reduction of the nitro group.Type: GrantFiled: May 28, 1992Date of Patent: March 23, 1993Assignee: BASF AktiengesellschaftInventors: Manfred Patsch, Klaus Pandl, Jacques Dupuis, Helmut Hagen
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Patent number: 5175262Abstract: Reactive dyes of the formula ##STR1## where R.sup.1 is hydrogen, methyl or ethyl,X is hydrogen or hydroxysulfonyl,Hal is fluorine or chlorine,D is phenylene, carboxyl- or hydroxysulfonyl-monosubstituted or -disubstituted phenylene or hydroxysulfonyl-monosubstituted or -disubstituted naphthylene,A is a fiber-reactive radical, or A--D combined is a benzo-fused fiber-reactive radical, andZ is a bridge member, are useful for dyeing or printing hydroxyl- or nitrogen-containing substrates.Type: GrantFiled: October 25, 1991Date of Patent: December 29, 1992Assignee: BASF AktiengesellschaftInventors: Hermann Loeffler, Klaus Pandl, Manfred Patsch, Siegel Bernd
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Patent number: 5149789Abstract: Reactive dyes of the formula ##STR1## where 1 is 0 or 1,n is 0 or 1,E is nitrogen or C--Cl,A is the radical of an azo dye attached to the triazine ring via an imino or C.sub.1 -C.sub.4 -alkylimino group,B--if E is nitrogen--is the radical of an azo dye or of a formazan dye which in either case is bonded to the triazine ring via an imino or C.sub.1 -C.sub.4 -alkylimino group or else--if n is 0--is fluorine, chlorine or unsubstituted or substituted amino, or --if E is C--C1--is fluorine, chlorine or methyl,X.sup.1 and X.sup.2 are independently of the other fluorine or chlorine,X.sup.3 is fluorine or chlorine or else--if E is C--Cl--methylsulfonyl andZ.sup.1 and Z.sup.2 are independently of the other a radical of the formula ##STR2## where L.sup.3 and L.sup.4 are independently of the other hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl,with the proviso that l and n are not simultaneously 0 and that, if E is C--Cl or if n is 0 and Z.sup.1 is the radical of the formula ##STR3## where L.sup.Type: GrantFiled: March 8, 1990Date of Patent: September 22, 1992Assignee: BASF AktiengesellschaftInventors: Joerg L. Jessen, Klaus Pandl, Hermann Loeffler, Bernd Siegel, Manfred Patsch
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Patent number: 5117050Abstract: Phenylene diamines of the formula ##STR1## in which R.sup.1 denotes hydrogen, formyl or oxalyl,R.sup.2 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl andR.sup.3 denotes hydrogen or C.sub.2 -C.sub.8 -alkanoyl,provided that R.sup.1 and R.sup.2 are not both hydrogen and that when R.sup.2 is methyl or ethyl, R.sup.1 and R.sup.3 are not both hydrogen, and a process for the preparation of phenylene diamines.Type: GrantFiled: April 16, 1990Date of Patent: May 26, 1992Assignee: BASF AktiengesellschaftInventors: Klaus Pandl, Manfred Patsch
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Patent number: 5047529Abstract: Phenylsulfones of the formula ##STR1## in which R.sup. is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, nitro, hydroxysulfonyl, carboxyl,the radical --NR.sup.3 R.sup.4,in which R.sup.3 and R.sup.4 are the same or different and denote hydrogen or C.sub.1 -C.sub.4 alkyl, which may or not be substituted,or the radical S(O).sub.n R.sup.5,in which n is 0 or 2 and R.sup.5 denotes C.sub.1 -C.sub.4 -alky which may or may not be substituted,R.sup.2 is hydroxy, mercapto or the radical R.sup.1,X is the radical ##STR2## or, with R.sup.2 in the ortho-position relative to the group SO.sub.2 --X,R.sup.2 and X together denote the radial ##STR3## in which Z.sup.1 is hydroxy, chlorine, C.sub.1 -alkanoyloxy- C.sub.1 -C.sub.4 -alkylsulfonyloxy penylsulfonyloxy, o- or p-tolylsulfonyloxy or sulfato andZ.sup.2 is oxygen, sulfur, imino or optionally substituted C.sub.1 -C.sub.4 -alkylimino, andY denotes amino, C.sub.1 -C.sub.4 -alkanoylamino or nitro, and a process for the preparation thereof.Type: GrantFiled: March 13, 1990Date of Patent: September 10, 1991Assignee: BASF AktiengesellschaftInventors: Manfred Patsch, Klaus Pandl, Martin Fischer
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Patent number: 5041540Abstract: Novel copper formazan reactive dyes which contain one or two chromophoric radicals derived from a copper formazan of the formula ##STR1## where R.sup.1 is hydrogen, hydroxysulfonyl, C.sub.1 -C.sub.4 -alkoxy or chlorine, R.sup.2 is hydrogen or hydroxysulfonyl and one of the two radicals R.sup.3 and R.sup.4 is hydrogen and the other is hydroxysulfonyl or, if at least one of the two radicals R.sup.1 and R.sup.2 is hydroxysulfonyl, R.sup.3 and R.sup.4 can each at the same time also be hydrogen, and two or three halotriazine radicals as reactive system, and salts thereof, are useful for dyeing or printing hydroxyl- or nitrogen-containing organic substrates.Type: GrantFiled: November 3, 1989Date of Patent: August 20, 1991Assignee: BASF AktiengesellschaftInventors: Klaus Pandl, Manfred Patsch
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Patent number: 5041631Abstract: A process for the preparation of 2-alkylamino-4-aminobenzenesulfonic acids by acylation of 2,4-diaminobenzenesulfonic acid followed by alkylation of the resulting 4-acylamino-2-aminobenzenesulfonic acid and, finally, removal of the acyl group by hydrolysis.Type: GrantFiled: September 20, 1990Date of Patent: August 20, 1991Assignee: BASF AktiengesellschaftInventors: Manfred Patsch, Klaus Pandl
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Patent number: 5004807Abstract: Copper formazan reactive dyes of the formula: ##STR1## where X is cyano, halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, one of two radicals Y and Z is hydrogen and the other is hydroxysulfonyl, R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or cyano- or carbamoyl-substituted C.sub.2 -C.sub.4 -alkyl and R.sup.2 is fluorine or chlorine, and salts thereof are useful for dyeing cellulose fibers, resulting in blue shades. Such dyes are soluble in water and have a high fastness level and tinctorial strength.Type: GrantFiled: November 4, 1988Date of Patent: April 2, 1991Assignee: BASF AktiengesellschaftInventors: Klaus Pandl, Manfred Patsch
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Patent number: 4973671Abstract: Double copper formazan reactive dyes of the formula ##STR1## in which R.sup.1 is hydrogen, hydroxylsulfonyl or chlorine; R.sup.2 is hydrogen or hydroxylsulfonyl; one of two radicals R.sup.3 and R.sup.4 is hydrogen and the other is hydroxylsulfonyl; Q is fluorine or chlorine; and X is a radical of the formula ##STR2## where R.sup.5 and R.sup.6 are identical or different and each is independently of the other hydrogen or unsubstituted or cyano- or hydroxyl-substituted C.sub.1 -C.sub.4 -alkyl and Y is hydroxyl or the radical NR.sup.7 R.sup.8 where R.sup.7 and R.sup.8 are identical or different and each is independently of the other hydrogen or unsubstituted or cyano-, hydroxyl- or hydroxylsulfonyl-substituted C.sub.1 -C.sub.4 -alkyl, with the proviso that R.sup.5 and R.sup.6 are not both hydrogen, or salts thereof are useful for dyeing and printing hydroxyl- or nitrogen-containing organic substrates.Type: GrantFiled: November 4, 1988Date of Patent: November 27, 1990Assignee: BASF AktiengesellschaftInventors: Klaus Pandl, Manfred Patsch