Patents Assigned to Celanese GmbH
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Patent number: 7319118Abstract: The present invention relates to the use of aqueous copolymer poly(vinyl ester) dispersions which comprise cellulose ethers in an amount up to a maximum of 0.45% by weight in food-coating compositions, and also food-coating compositions which comprise these aqueous copolymer poly(vinyl ester) dispersions, and their use in the coating of food, especially in the production of hard cheese.Type: GrantFiled: April 14, 2004Date of Patent: January 15, 2008Assignee: Celanese GmbHInventors: Bernd Papenfuhs, Holger Schimanke
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Publication number: 20030149267Abstract: Bidentate phosphine ligands of the formula 1Type: ApplicationFiled: November 12, 2002Publication date: August 7, 2003Applicant: Celanese GmbHInventors: Holger Geissler, Petrus W.N.M. Van Leeuwen, Paul C.J. Kamer, Lars A. Van der Veen
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Patent number: 6566521Abstract: Bidentate phosphine ligands of the formula wherein the substituents are as defined in the specification and a process for preparing linear aldehydes by hydroformylating internal olefins using such phosphine ligands.Type: GrantFiled: November 13, 2001Date of Patent: May 20, 2003Assignee: Celanese GmbHInventors: Holger Geissler, Petrus W. N. M. van Leeuwen, Paul C. J. Kamer, Lars A. van der Veen
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Patent number: 6342605Abstract: Bidentate phosphine ligands of the formula wherein the substituents are as defined in the specification and a process for preparing linear aldehydes by hydroformylating internal olefins using such phosphine ligands.Type: GrantFiled: August 18, 1999Date of Patent: January 29, 2002Assignee: Celanese GmbHInventors: Holger Geissler, Petrus W. N. M. van Leeuwen, Paul C. J. Kamer, Lars A. van der Veen
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Patent number: 6310235Abstract: The invention relates to an improved method for producing ester plasticizers by reacting di- or polycarboxylic acids or their anhydrides with alcohols in the presence of metal catalysts.Type: GrantFiled: November 17, 1999Date of Patent: October 30, 2001Assignee: Celanese GmbHInventor: Wilhelm Gick
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Patent number: 6300517Abstract: A description is given of new chiral phosphine ligands containing amino acid groups and having the formula I where R1 is hydrogen, a C1-C7-alkyl radical, a C6-C10-aryl radical or a monovalent metal, preferably sodium or potassium, R2 is hydrogen or a C1-C7-alkyl radical, R3 is hydrogen or an —NR5R6 radical, where R5 and R6 are identical or different and are hydrogen or C1-C7-alkyl or C6-C10-aryl radicals, m is 0 or 1, with the exception of the compounds in which R5 and R6 are hydrogen and at the same time R2 is hydrogen, R4 is phenyl and R1 is methyl or benzyl and a process for their preparation. These phosphine ligands are suitable as constituents of metal complexes which can be used as catalysts for reactions to form C—C, C—H, C—N, C—Si or C═O bonds.Type: GrantFiled: December 10, 1999Date of Patent: October 9, 2001Assignee: Celanese GmbHInventors: Othmar Stelzer, Michael Tepper
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Patent number: 6288288Abstract: A process for preparing saturated alcohols comprising effecting an aldol condensation of alkyl methyl ketones of 6 to 8 carbon atoms which are branched at the &bgr;-carbon atom with aldehydes of 4 to 15 carbon atoms which are branched at the &agr;-carbon atom to form &agr;,&bgr;-unsaturated ketones and subsequent hydrogenation of the &agr;,&bgr;-unsaturated ketones to obtain alcohols, wherein the aldol condensation is carried out at a temperature of 60 to 130° C. in the presence of a 30-55% strength aqueous solution of an alkali metal hydroxide resulting in very low by-product formation.Type: GrantFiled: November 25, 1998Date of Patent: September 11, 2001Assignee: Celanese GmbHInventor: Helmut Springer
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Patent number: 6274774Abstract: The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170° C. and a pressure of between 1 and 300 bar an olefinically unsaturated C6-C16 compound in the presence aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 10 and 70 wt % of a compound of formula (1), R(OCH2CH2)nOR1, R standing for hydrogen, a straight-chain or branched C1-C4 alkyl group or a C1-C4 hydroxyalkyl group, R1 standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.Type: GrantFiled: August 30, 1999Date of Patent: August 14, 2001Assignee: Celanese GmbHInventors: Sandra Bogdanovic, Carl-Dieter Frohning, Helmut Bahrmann
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Patent number: 6268522Abstract: The invention relates to a process for producing supported shell catalysts comprising noble metals by UV photoreduction of noble metal salt precursors fixed to a support. For this purpose, the shaped supported body is impregnated with suitable noble metal salts which are then reduced to the metals in a zone close to the surface by means of UV radiation, preferably in the absence of a chemical reducing agent. The metal salts in the interior of the pellets which have not been irradiated and therefore have not been reduced are extracted using a solvent. The noble metal shell catalysts produced in this way can be used for many heterogeneously catalyzed reactions such as hydrogenations and oxidations. According to the invention, Pd/Au shell catalysts on porous ceramic supports, e.g. SiO2 shaped bodies, produced by this process can be used in the synthesis of vinyl acetate.Type: GrantFiled: June 3, 1998Date of Patent: July 31, 2001Assignee: Celanese GmbHInventors: Alfred Hagemeyer, Uwe Dingerdissen, Klaus Kühlein, Johannes Heitz, Dieter Bäuerle
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Patent number: 6228226Abstract: A process for working up crude, liquid vinyl acetate feed containing acetic acid, water and ethyl acetate and optionally smaller amounts of other impurities by distillation, wherein there is introduced into the distillation column, above the feed point of the crude, liquid vinyl acetate, 0.1 to 5% by weight of water, based on the crude, liquid vinyl acetate feed, and 0.1 to 60% by weight of acetic acid, based on the crude, liquid vinyl acetate feed.Type: GrantFiled: May 21, 1999Date of Patent: May 8, 2001Assignee: Celanese GmbHInventors: Stefan Hess, Michael Mark, Melchior A. Meilchen, Johann Stamm, Thomas Vernaleken, Martin Wagner
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Patent number: 6225504Abstract: A process for the preparation of the formula Ar13−xP[(Ar2(OZ)y]x I wherein Ar1 and Ar2 are individually aromatic of 6 to 20 carbon atoms or heteroaromatic of 4 to 9 carbon atoms, each unsubstituted or substituted with at least one member of the group consisting of halogen, carboxyl, —OH, alkyl of 1 to 6 carbon atoms, phenyl and naphthyl, Ar1 has one valence and R2 has y+1 valences, x is an integer of 1, 2 or 3, y is 1 or 2, Z is carbohydrate with a glycosidic bond comprising reacting a hydrocarbon halide of the formula Z′—X II when Z′ has the definition of Z with —OH protected and X is chlorine, bromine or fluorine with a phosphane of the formula Ar13−xP[(Ar2 (OH)y]x III in a multi-phase reaction medium in the presence of a base and a phase transfer catalyst to form a phosphane of the formula Ar13−xP[(Ar2(OZ1)y]x IV and removal of the protective groups to form a compound of FoType: GrantFiled: June 23, 1999Date of Patent: May 1, 2001Assignee: Celanese GmbHInventors: Sandra Bogdanovic, Matthias Beller, Alexander Zapf, Jurgen Krauter
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Patent number: 6211414Abstract: The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170° C. and a pressure of between 1 and 300 bar an olefinically unsaturated C3-C5 compound in the presence of an aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 1 and 35 wt % of a compound of formula (1), R(OCH2CH2)nOR1, R standing for hydrogen, a straight-chain or branched C1-C4 alkyl group or a C1-C4 hydroxyalkyl group, R1 standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.Type: GrantFiled: August 31, 1999Date of Patent: April 3, 2001Assignee: Celanese GmbHInventors: Sandra Bogdanovic, Helmut Bahrmann, Carl-Dieter Frohning, Ernst Wiebus
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Patent number: 6191063Abstract: A catalyst comprising rhodium and a compound of the formula (I) in which m is a number from 1 to 1000; x is a number from 0 to 4; W is a group of the formulae —CH2—CH2—, —CH(CH3)CH2—or —CH2CH(CH3)—; R is hydrogen, a straight-chain or branched C1-C5— alkyl radical; or a group of the formulae where a, b, c, d and e independently of one another are a number from 0 to 1000, at least one of the numbers a, b, c, d and e being greater than 0; R5, R6, R7, R8 and R9 are identical or different and are hydrogen, C1-C5-alkyl or a group of the formula R1 and R2 are identical or different and are a straight-chain, branched or cyclic C1-C30-alkyl radical or C6-10-aryl radical, which is unsubstituted or substituted by from one to five C1-C3-alkyl radicals, and L is C1-C5-alkyl, C1-C5-alkoxy, NO2, NR3R4, where R3 and R4 independently of one another are hydrogen or C1-C4-alkyl, or L is Cl or OH, for hydroformylation reType: GrantFiled: July 1, 1999Date of Patent: February 20, 2001Assignee: Celanese GmbHInventors: Sandra Bogdanovic, Carl-Dieter Frohning, Helmut Bahrmann, Matthias Beller, Steffen Haber, Hans-Jerg Kleiner
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Patent number: 6187953Abstract: Guanidinium phosphanes of Formula I wherein the substituents are defined as in the specification which are useful catalyst ligands for the carbon-carbon linkage reactions of the hect reaction.Type: GrantFiled: November 17, 1999Date of Patent: February 13, 2001Assignee: Celanese GmbHInventors: Othmar Stelzer, Franz Peter Schmidtchen, Antonella Hessler, Michael Tepper, Harald Dibowski, Michael Riedel, Helmut Bahrmann
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Patent number: 6150298Abstract: Process for the telomerization of dienesThe present invention relates to a process for the telomerization of dienes, according to which the diene is reacted with a compound containing an active hydrogen atom in the presence of a palladium compound, a water-soluble phosphine ligand and a base, the water-soluble ligand being a bidentate ligand having the following formula I ##STR1## in which R is identical or different and is phenyl, C.sub.1 -C.sub.12 -alkyl or C.sub.3 -C.sub.10 -cycloalkyl, which may be unsubstituted or substituted by one or more radicals R',R' is identical or different and is SO.sub.3.sup.- M.sup.+, --NMe.sub.3.sup.+ or --COO.sup.- M.sup.+,n is an integer from 1 to 6, in each case based on a naphthyl backbone, andM is H, Na, K, Cs or R".sub.4 N.sup.+ where R" is identical or different and is H, C.sub.1 -C.sub.12 -alkyl or C.sub.1 -C.sub.10 -cycloalkyl.Type: GrantFiled: June 25, 1999Date of Patent: November 21, 2000Assignee: Celanese GmbHInventors: Ahmed Tafesh, Matthias Beller, Jochen Krause
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Patent number: 6140544Abstract: A process for oxidizing a reaction gas in the presence of a catalyst solution comprisinga) oxidizing the reaction gas in a reactor in the presence of the catalyst solution, a reaction mixture being formed comprising droplets of the catalyst solution,b) passing the reaction gas into a first separator wherein the droplets of the catalyst solution are removed from the reaction mixture,c) passing the remaining reaction mixture from the first separator into a scrubbing apparatus wherein the oxidation product is removed from the reaction mixture, andd) passing the reaction mixture from the first separator through a second separator downstream of the first separator and upstream of a scrubbing apparatus wherein residual catalyst solution from the reaction mixture is removed.Type: GrantFiled: April 19, 1999Date of Patent: October 31, 2000Assignee: Celanese GmbHInventors: Bernd Rinne, Erhard Franken-Stellamans
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Patent number: 6139747Abstract: A process for cleaning up the wastewaters which originate from the preparation of alcohols. The alcohol preparation includes an aldolization reaction followed by hydrogenation and then alcohol distillation. The resulting wastewaters include 3 wastewater fractions from respective steps in the alcohol preparation. The process for cleaning up these wastewaters include the steps of (a) combining two of the three fractions and adjusting the pH of the combination, (b) bringing at least one of the fractions into contact with a coalescing filter, and (c) extracting a mixture of all three fractions.Type: GrantFiled: December 16, 1998Date of Patent: October 31, 2000Assignee: Celanese GmbHInventors: Mariola Rotzheim, Wolfgang Zgorzelski
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Patent number: 6137013Abstract: A method of stabilizing aliphatic C.sub.3 -C.sub.14 -aldehydes against polymerization and autocondensation by the addition of alkaline substances to the aldehydes wherein the alkaline substances used are alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates or alkali metal carboxylates which are added to the aldehyde to be stabilized in amounts of 0.05-20 ppm, based on the aldehyde.Type: GrantFiled: December 15, 1998Date of Patent: October 24, 2000Assignee: Celanese GmbHInventors: Michael Riedel, Wolfgang Zgorzelski, Michael Messerschmidt, Klaus Bergrath
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Patent number: 6114571Abstract: A catalyst for preparing vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases with, at the same time, low-high boiler formation which catalyst comprises palladium and/or its compounds, gold and/or its compounds, moron or boron compounds and alkali metal compounds on a particular support.Type: GrantFiled: November 2, 1998Date of Patent: September 5, 2000Assignee: Celanese GmbHInventors: Roland Abel, Ioan Nicolau, Erich Hopf, Rainer Kiemel
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Patent number: 6114272Abstract: A catalyst for preparing aldehydes by hydroformylation of olefins or olefinically unsaturated compounds comprising at least one rhodium compound and a non-aqueous ionic ligand liquid of the formula (Q.sup.+).sub.a A.sup.a-, where Q.sup.+ is a singly charged quaternary ammonium and/or phosphonium cation or the equivalent of a multiply charged ammonium and/or phosphonium cation and A.sup.a- is a sulfonated triarylphosphine.Type: GrantFiled: July 26, 1999Date of Patent: September 5, 2000Assignee: Celanese GmbHInventor: Helmut Bahrmann