Patents Assigned to Veba Oel AG
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Patent number: 5973217Abstract: According to the process described, old or waste plastics are depolymerized into a pumpable phase and a volatile phase to allow recovery of chemical raw materials and liquid fuel components. The volatile phase is separated into a gaseous phase and a condensate. In order to simplify the process in comparison with the state of the art, the depolymerised product remaining after the volatile phase is separated is also heated together with the condensate or condensate fractions in the presence of hydrogen under pressure and is subjected to hydrotreating, after non-boiling components are removed, to produce syncrude.Type: GrantFiled: January 9, 1998Date of Patent: October 26, 1999Assignee: Veba Oel AGInventors: Horst Hastrich, Christian Hecka, Rolf Holighaus, Klaus Niemann, Claus Strecker
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Patent number: 5917102Abstract: The invention relates to a device for depolymerizing used and waste plastics, comprising a closed reactor and a circulation system the mildly heating of the reactor contents connected to the reactor, as well as to a process for depolymerizing used and waste plastics. To protect the circulation system from erosion by solid particles contained in the reactor contents, the reactor is designed so that the reactor contents drawn off into the circulation system traverse a riser section integrated into the reactor for removing fairly coarse solid particles having correspondingly high settling rate before entry into the take-off line.Type: GrantFiled: March 21, 1997Date of Patent: June 29, 1999Assignee: VEBA OEL AGInventors: Rolf Holighaus, Klaus Niemann, Klaus Strecker, Dieter Ullrich, Christian Hecka
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Patent number: 5789636Abstract: The invention concerns a process for recovering synthetic raw materials and fluid fuel components from used or waste plastics in accordance with patent application P 43 11 034,7. At least a partial flow of the depolymer produced according to this process is subjected, together with coal, to a coking process, fed to a thermal utilization system or introduced as a reducing agent into a blast furnace process. The depolymer can be used as an additive for bitumen and bituminous products.Type: GrantFiled: August 15, 1997Date of Patent: August 4, 1998Assignee: Veba Oel AGInventors: Rolf Holighaus, Klaus Niemann, Claus Strecker
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Patent number: 5780688Abstract: The invention concerns a supported catalyst in the form of packing and constructed on an open-pore support material on whose external and internal surfaces a macro-porous ion exchange resin is mechanically and/or chemically affixed.Type: GrantFiled: April 5, 1996Date of Patent: July 14, 1998Assignee: Veba Oel AGInventors: Ulrich Hoffmann, Ulrich Kunz, Hartmut Bruderreck, Klaus Gottlieb, Kuno Schadlich, Stefan Becker
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Patent number: 5466432Abstract: The invention relates to a crystalline zeolite-like gallosilicate having an atomic ratio of Si/Ga in the outer crystalline surface that is not larger than the average Si/Ga ratio for the whole of the crystal. The invention also relates to a method of making such a gallosilicate comprising the hydrothermal crystallization of a strictly inorganic reaction mixture having the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05-1.0; and H.sub.2 O/SiO.sub.2 =10-1,000. The invention further relates to the above-described method wherein said reaction mixture is prepared by adding an aged gel to a first mixture, the first mixture preferably having a composition with the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05 to 1.0; and H.sub.2 O/SiO.sub.2 =20 to 100.Type: GrantFiled: August 8, 1994Date of Patent: November 14, 1995Assignees: VAW Aluminium AG, Veba Oel AGInventors: Martin Wallau, Rudolf Spichtinger, Klaus K. Unger, Arno Tissler, Roland Thome
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Patent number: 5396015Abstract: Skeletal isomerization of n-alkenes into isoalkenes and enrichment of isoalkenes in alkene-containing hydrocarbon mixtures is effected in the presence of an isomerization catalyst containing a microporous silicon-containing alumophosphate.A goal of the method for skeletal isomerization is to provide a running time in one operating period of over 100 hours. This goal is achieved by using, as isomerization catalysts, microporous alumophosphates with a molecular sieve structure whose pore inlet openings have a diameter of 0.4 to 0.6 nm which are mixed with a binder and activated at temperatures of 623 to 873K.Type: GrantFiled: November 30, 1992Date of Patent: March 7, 1995Assignee: Veba Oel AGInventors: Rolf Fricke, Gerhard Ohlmann, Udo Roost, Heide L. Zubowa, Dieter Timm, Karl Becker, Helmut Striegler
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Patent number: 5365002Abstract: The invention relates to a crystalline zeolite-like gallosilicate having an atomic ratio of Si/Ga in the outer crystalline surface that is not larger than the average Si/Ga ratio for the whole of the crystal. The invention also relates to a method of making such a gallosilicate comprising the hydrothermal crystallization of a strictly inorganic reaction mixture having the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05-1.0; and H.sub.2 O/SiO.sub.2 =10-1,000. The invention further relates to the above-described method wherein said reaction mixture is prepared by adding an aged gel to a first mixture, the first mixture preferably having a composition with the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05 to 1.0; and H.sub.2 O/SiO.sub.2 =20 to 100.Type: GrantFiled: June 24, 1992Date of Patent: November 15, 1994Assignees: VAW Aluminium AG, Veba OEL AGInventors: Martin Wallau, Rudolf Spichtinger, Klaus K. Unger, Arno Tissler, Roland Thome
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Patent number: 5273737Abstract: Disclosed is a method for preparing crystalline gallosilicates having a molar ratio of SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5 an having a more uniform particle size with enhanced catalytic activity. According to the method of the invention, crystalline gallosilicates are prepared by adding an aged, gallosilicate nuclei-forming gel having a molar ratio of SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5 to an aqueous, alkaline solution containing reactive silicon and gallium compounds to form a mixture. The mixture is then subjected to hydrothermal crystallization conditions to form the crystalline gallosilicate. The gallosilicates prepared by the disclosed method is useful for the preparation of catalysts and adsorbents and in processes for converting low molecular weight hydrocarbons to higher aliphatics and aromatic compounds.Type: GrantFiled: July 3, 1991Date of Patent: December 28, 1993Assignees: Vaw Aluminum AG, Veba Oel AGInventors: Martin Wallau, Rudolf Spichtinger, Arno Tissler, Klaus K. Unger, Roland Thome
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Patent number: 4704497Abstract: A process for dehydrogenating saturated or unsaturated hydrocarbons wherein the flow direction of the oxygen-containing gas, employed for removing coke deposits on the catalyst surface, is opposite to that for the hydrocarbon feed undergoing dehydrogenation.Type: GrantFiled: July 14, 1986Date of Patent: November 3, 1987Assignee: Veba Oel AGInventors: Klaus Gottlieb, Wilfried Graf, Heinz-Kuno Schadlich
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Patent number: 4664904Abstract: Atomic hydrogen for chemical reaction is produced in relatively high concentrations by the combustion of molecular hydrogen with a substoichiometric quantity of oxygen. The chemical reactant is supplied at the point of the development of the atomic hydrogen. Combustion is effected at pressures between 10 mbar and 1.5 bar, with a mole ratio of molecular hydrogen to molecular oxygen of 2.3 to 5.0.Type: GrantFiled: September 25, 1985Date of Patent: May 12, 1987Assignee: Veba Oel AgInventors: Jurgen Wolfrum, Jurgen Warnatz, Hartmut Bruderreck, Klaus Gottlieb, August-Wilhelm Preuss
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Patent number: 4468233Abstract: A motor fuel comprising 35-98% hydrocarbon-containing base and 2-65% by volume of an additive which comprises a mixture containing(a) 5-35% by volume of methyl tert-butyl ether;(b) 5-40% by volume of isopropyl tert-butyl ether; and(c) 5-40% by volume of sec-butyl tert-butyl ether,has a high octane number and reduces exhaust pollutants.Type: GrantFiled: April 28, 1982Date of Patent: August 28, 1984Assignee: Veba Oel AGInventors: Hartmut Bruderreck, Gunter Deininger, Klaus Gottlieb, Friedel-Heinrich Wehmeier, Manfred Haselhorst
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Patent number: 4408085Abstract: A process for producing sec-butanol and sec-butyl tert-butyl ether from butane comprises: (a) partially isomerizing n-butane to produce a mixture of n-butane and isobutane; (b) catalytically dehydrogenating said butanes to produce a mixture containing at least butene-1, isobutene and butadiene; (c) selectively hydrogenating butadiene and converting butene-1 to butene-2; (d) etherifying isobutene contained in the dehydrogenation reaction mixture with sec-butanol to form a mixture of sec-butyl tert-butyl ether and unreacted hydrocarbons; (e) converting butene-2 from the unreacted hydrocarbon mixture by hydration to produce sec-butanol; (f) recycling said sec-butanol to the etherification step; recovering said sec-butyl tert-butyl ether.Type: GrantFiled: April 28, 1982Date of Patent: October 4, 1983Assignee: VEBA OEL AGInventors: Klaus Gottlieb, Wilfried Graf
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Patent number: 4393250Abstract: A process for producing isopropyl alcohol and isopropyl tert-butyl ether from a mixture of light hydrocarbons containing propane and butane, comprises:(a) separating from the mixture of light hydrocarbons a propane fraction and a butane fraction containing at least n-butane;(b) isomerizing at least a portion of the n-butane in the butane fraction from step (a) whereby a hydrocarbon mixture containing at least n-butane and isobutane is formed;(c) catalytically dehydrogenating the isobutane in the hydrocarbon mixture from step (b) whereby a hydrocarbon mixture containing at least isobutene is produced;(d) catalytically dehydrogenating the propane in the propane fraction from step (a) whereby a hydrocarbon mixture containing at least propene is produced;(e) reacting the propene in the hydrocarbon mixture from step (d) with water, whereby a mixture containing hydrocarbons and isopropyl alcohol is formed;(f) reacting the isopropyl alcohol from step (e) with at least part of the isobutene in the hydrocarbon mixtureType: GrantFiled: April 28, 1982Date of Patent: July 12, 1983Assignee: Veba Oel AGInventors: Klaus Gottlieb, Hartmut Bruderreck, Friedel-Heinrich Wehmeier
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Patent number: 4388173Abstract: The condensible parts are removed from the distillation gas of oil shale, a portion of the remaining amount of gas is removed and the rest is heated, e.g., by the combustion gas of the distillation residue and used without the addition of any more materials to distill oil shale. The installation for this consists of a distillation cyclone reactor, whose gas outlets are connected to an oil separator and whose tangential feed nozzles are connected by way of a blower and a heat exchanger to the oil separator.Type: GrantFiled: June 24, 1981Date of Patent: June 14, 1983Assignee: Veba Oel AgInventors: Gerd Escher, Heinz Frohnert, Hans-Peter Wenning
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Patent number: 4302353Abstract: A method for the continuous production of synthesis gas comprising carbon monoxide and hydrogen through the autothermal gasification of solid combustibles in a pressure reactor which comprises:introducing into a screw machine containing two parallely ordered shafts, a finely divided solid combustible, moistening and intimately mixing the solid combustible with 2 to 30% by weight of water, degasing and compressing the moist solid combustible to a pressure higher than that of the reactor, adding the gas-tight compressed and moist solid combustible to a reaction chamber-through a burner where the combustible is brought into contact with the gasification medium, thereby evaporating the water in the compressed and moist solid combustible and producing a comminuted dispersion of the solid combustible in the mixture of the gasification medium and water vapor;reacting the combustible dispersion to give a raw synthesis gas and removing the raw synthesis gas from the reactor.Type: GrantFiled: September 27, 1979Date of Patent: November 24, 1981Assignee: Veba Oel AGInventors: Gerd Escher, Johann Harjung, H. Peter Wenning
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Patent number: 4255161Abstract: Apparatus for introducing solid fuels into a pressure gasification reactor comprising at least one conveyor worm turnable in a housing for conveying finely divided fuel, optionally mixed with a binder, and compacting the fuel into a gas-tight plug which is discharged through a discharge opening leading to the pressure gasification reactor. The discharge opening is provided with a closure member and the housing has an outlet opening also provided with a closure member near the discharge opening. The outlet opening is open to the ambient atmosphere. The closure members of the discharge opening and the outlet opening are alternatively actuatable such that when one is open the other is closed.Type: GrantFiled: November 9, 1979Date of Patent: March 10, 1981Assignees: Werner & Pfleiderer, Veba Oel AGInventors: Albert Grimminger, Jurgen Strecker, Werner Wiedmann, Peter Wenning