Patents by Inventor Wilhelm Droste
Wilhelm Droste 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).
-
Patent number: 7304188Abstract: The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality.Type: GrantFiled: June 14, 2003Date of Patent: December 4, 2007Assignee: OXENO Olefinchemie GmbHInventors: Fritz Obenaus, Wilhelm Droste, Bernhard Scholz, Franz Nierlich, Rainer Malzkorn, Udo Peters, Jochen Praefke, Richard Filipiak, Joachim Neumeister
-
Patent number: 7179947Abstract: A process for the catalytic hydroformylation of olefins having from 6 to 24 carbon atoms, in which the hydroformylation is carried out in one or more stage(s) and a mixture comprising at least one olefin and an aldehyde in a molar ratio of aldehyde to olefin of from 0.005:1 to 0.2:1 is used as feed in at least one of these stages which is carried out in the presence of an unmodified cobalt complex as catalyst.Type: GrantFiled: December 2, 2005Date of Patent: February 20, 2007Assignee: Oxeno Olefinchemie GmbHInventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken, Wilhelm Droste
-
Publication number: 20060264681Abstract: The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality.Type: ApplicationFiled: June 14, 2003Publication date: November 23, 2006Applicant: OXENO OLEFINCHEMIE GMBHInventors: Fritz Obenaus, Wilhelm Droste, Bernhard Scholz, Franz Nierlich, Rainer Malzkorn, Udo Peters, Jochen Praefke, Richard Filipiak, Joachim Neumeister
-
Patent number: 7138552Abstract: The present invention relates to a process for preparing a C13-alcohol mixture which is suitable, in particular, as precursor for the preparation of compounds having surfactant properties and of plasticizers.Type: GrantFiled: March 25, 2003Date of Patent: November 21, 2006Assignee: OXENO Olefinchemie GmbHInventors: Alfred Kaizik, Walter Tötsch, Wilhelm Droste, Wilfried Büschken, Dirk Röttger, Klaus-Diether Wiese
-
Publication number: 20060128998Abstract: A process for the catalytic hydroformylation of olefins having from 6 to 24 carbon atoms, in which the hydroformylation is carried out in one or more stage(s) and a mixture comprising at least one olefin and an aldehyde in a molar ratio of aldehyde to olefin of from 0.005:1 to 0.2:1 is used as feed in at least one of these stages which is carried out in the presence of an unmodified cobalt complex as catalyst.Type: ApplicationFiled: December 2, 2005Publication date: June 15, 2006Applicant: DEGUSSA AGInventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken, Wilhelm Droste
-
Publication number: 20050234270Abstract: The present invention relates to a process for preparing a C13-alcohol mixture which is suitable, in particular, as precursor for the preparation of compounds having surfactant properties and of plasticizers.Type: ApplicationFiled: March 25, 2003Publication date: October 20, 2005Applicant: OXENO OLEFINCHEMIE GMBHInventors: Alfred Kaizik, Walter Totsch, Wilhelm Droste, Wilfried Buschken, Dirk Rottger, Klaus-Diether Wiese
-
Publication number: 20020026087Abstract: Butene oligomers and di-iso-butane are prepared from field butanes by a process, which comprises:Type: ApplicationFiled: July 31, 2001Publication date: February 28, 2002Applicant: OXENO Olefinchemie GmbHInventors: Franz Nierlich, Paul Olbrich, Wilhelm Droste, Richard Mueller, Walter Toetsch
-
Patent number: 6239318Abstract: The invention relates to a process for the selective hydrogenation of reaction mixtures from the hydroformylation of C5 to C24 olefins using hydrogen and a supported catalyst which, as active components, comprises copper, nickel and chromium.Type: GrantFiled: September 15, 1999Date of Patent: May 29, 2001Assignee: Oxeno Olefinchemie GmbHInventors: Joachim Schuler, Alfred Kaizik, Bernhard Scholz, Wilfried Bueschken, Wilhelm Droste
-
Patent number: 5998685Abstract: A highly flexible process for preparing butene oligomers from field butanes. The process can be controlled to produce the desired oligomerization products by appropriate selection of the starting materials.Type: GrantFiled: July 24, 1997Date of Patent: December 7, 1999Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Paul Olbrich, Wilhelm Droste, Richard Mueller, Walter Toetsch
-
Patent number: 5994601Abstract: A process is described in which butene oligomers are prepared from Fischer-Tropsch olefins, in which the butenes present in a C.sub.4 fraction of Fischer-Tropsch hydrocarbons are oligomerized to obtain dibutene. The dibutene can be fractionated in a fine distillation stage into di-n-butene and di-isobutene. In one embodiment of the process, the ethylene present in the Fischer-Tropsch olefins is dimerized and the dimerization mixture is recycled to the C.sub.4 fraction. In another embodiment, the isobutene present in the C.sub.4 fraction is reacted with an alcohol to give an alkyl tert-butyl ether, and only the remaining n-butene is oligomerized so that di-n-butene is formed as the sole dibutene.Type: GrantFiled: July 24, 1997Date of Patent: November 30, 1999Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Walter Toetsch, Paul Olbrich, Wilhelm Droste, Richard Mueller
-
Patent number: 5912191Abstract: A process for the coupled production of alkyl tert-butyl ethers and butene oligomers from a mixture containing isobutane and n-butane. The isobutane is converted to the alkyl tert-butyl ether and the n-butane is converted to the oligomers. The ratio of the two reaction products may be controlled by setting the ratio of n-butane to isobutane appropriately by isomerization.Type: GrantFiled: July 24, 1997Date of Patent: June 15, 1999Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Paul Olbrich, Wilhelm Droste, Richard Mueller, Walter Toetsch
-
Patent number: 5864052Abstract: The invention relates to a process for preparing di-n-butene and alkyl tertbutyl ethers in a coupled production from field butanes, which indicates (a) separating the field butanes 1 into n-butane and isobutane in the separation stage 4, (b) dehydrogenating the n-butane 5 in a dehydrogenation stage 6 to give an n-butene-containing dehydrogenation mixture 7, oligomerizing the n-butene in the oligomerization stage 10 to give an oligomer mixture 11 and separating di-n-butene 12 off from this, and (c) de-hydrogenating the isobutane 15 in the dehydrogenation stage 16 to give an isobutene-containing dehydrogenation mixture 17 and reacting the isobutene with an alkanol 20 in the etherification stage 19 to give an alkyl tert-butyl ether 21.Type: GrantFiled: July 24, 1997Date of Patent: January 26, 1999Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Paul Olbrich, Wilhelm Droste, Richard Mueller, Walter Toetsch
-
Patent number: 5569802Abstract: The present invention relates to a catalyst for the selective hydrogenation of an unsaturated compound, based on a noble metal and/or a noble-metal oxide on an aluminum oxide support, and to a process for the preparation of the catalyst. The present invention further relates to a process for the selective hydrogenation of unsaturated compounds.Type: GrantFiled: September 28, 1994Date of Patent: October 29, 1996Assignee: Huels AktiengesellschaftInventors: Hans-Gerd L uken, Lothar Fischer, Wilhelm Droste, Bernd Nowitzki
-
Patent number: 5177282Abstract: Olefins are oligomerized by passing a hydrocarbon feedstock mixture containing olefins of from 2 to 8 carbon atoms over a molecular sieve having a pore diameter of from greater than 4 angstroms to 15 angstroms, and then oligomerizing said olefins by passing the hydrocarbon feedstock over a nickel-containing catalyst at a temperature of from 0.degree.to 200.degree. C. and at a pressure of from 1 to 70 bar absolute.Type: GrantFiled: April 4, 1990Date of Patent: January 5, 1993Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Joachim Neumeister, Thomas Wildt, Wilhelm Droste, Fritz Obenaus
-
Patent number: 5146039Abstract: A hydrocarbon containing sulfides, disulfides, trisulfides, tetrasulfides or mixtures can be desulfurized by contacting the hydrocarbon with a zeolite containing copper, silver, zinc or mixtures thereof.Type: GrantFiled: November 6, 1990Date of Patent: September 8, 1992Assignee: Huels AktiengesellschaftInventors: Thomas Wildt, Franz Nierlich, Wilhelm Droste, Joachim Neumeister, Bernhard Scholz
-
Patent number: 4968849Abstract: A process for preparing 2-ethylhexanol by the liquid-phase catalytic hydrogenation of 2-ethylhexenal and a catalyst for preforming this catalytic hydrogenation are disclosed.Type: GrantFiled: December 2, 1988Date of Patent: November 6, 1990Assignee: Huels AktiengesellschaftInventors: Hans-Gerd Lueken, Uwe Tanger, Wilhelm Droste, Gernard Ludwig, Dietmar Gubisch
-
Patent number: 4912271Abstract: Vinyl chloride is prepared by reacting acetylene with hydrogen chloride in the presence of a palladium compound catalyst in a solvent of an aliphatic and/or cycloaliphatic carboxylic acid amide at temperatures higher than room temperature.Type: GrantFiled: April 18, 1989Date of Patent: March 27, 1990Assignee: Huels AktiengesellschaftInventors: Gerhard Thelen, Harald Bartels, Wilhelm Droste, Herbert Deppe
-
Patent number: 4282389Abstract: A process for the simultaneous manufacture of pure methyl tertiary butyl ether (MTBE) and a substantially isotubene-free mixture of C.sub.4 -hydrocarbons, by reacting the isobutene contained in the mixture of C.sub.4 -hydrocarbons with excess methanol in the liquid phase at elevated temperatures on strongly acid, macroporous, organic ion exchange resins.The process has the following steps:(a) methanol and isobutene are reacted in a molar ratio of 2:1 to 5:1 at temperatures between 30.degree. and 100.degree. C.;(b) the unconverted hydrocarbons are then removed as the top product under a pressure of 2 to 10 bars from a first rectification column;(c) the bottom product from this first column is rectified in a second column under normal pressure or under a slight excess pressure of up to 2 bars at the top of the column, the bottom product of this rectification is recycled to reaction zone (a), if necessary, after separating off a portion of the tertiary butanol formed and the C.sub.Type: GrantFiled: December 4, 1979Date of Patent: August 4, 1981Assignee: Chemische Werke Huls A.G.Inventors: Wilhelm Droste, Fritz Obenaus
-
Patent number: 4219678Abstract: Process for the preparation of pure methyl tert.-butyl ether. Isobutene or isobutene-containing hydrocarbon mixtures are reacted with methanol in a molar ratio of 1:1 to 1:2 in the liquid phase at temperatures of between 30.degree. and 100.degree. C. on sulfonated, strongly acidic, macroporous organic ion exchange resins. After separation of the unreacted hydrocarbons, the reaction mixture is distilled under pressure; the methanol-containing distillate formed during the distillation is recycled into the zone of the reaction between methanol and isobutene; and pure methyl tert.-butyl ether is withdrawn from the sump of the distillation column.Type: GrantFiled: December 29, 1978Date of Patent: August 26, 1980Assignee: Chemische Werke Huls AGInventors: Fritz Obenaus, Wilhelm Droste, Wolf Streubel, Michael Zolffel, Wolfgang Muller
-
Patent number: 4000199Abstract: Acetone is produced by the catalytic, oxidative decarbonylation of isobutyraldehyde in the gaseous phase by contacting a gaseous mixture of 1-15% by volume of isobutyraldehyde, at least a stoichiometric amount and up to about 30% by volume of oxygen, and an inert diluent, with a copper oxide catalyst.Type: GrantFiled: March 26, 1975Date of Patent: December 28, 1976Assignee: Chemische Werke Huels AktiengesellschaftInventors: Fritz Obenaus, Wilhelm Droste