Patents by Inventor Ulrich Wagner

Ulrich Wagner 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: 4647344
    Abstract: Isoprene is recovered from a C.sub.5 -hydrocarbon mixture containing isoprene, penta-1,3-diene and cyclopentadiene by separating the said mixture by liquid-liquid extraction or extractive distillation with the aid of a selective solvent, in combination with a distillation upstream or downstream from the liquid-liquid extraction or extractive distillation, by a method in which a stream containing penta-1,3-diene and cyclopentadiene is separated off in the upstream or downstream distillation and is catalytically hydrogenated, and the hydrogenated stream is fed to the upper part of the liquid-liquid extraction or extractive distillation.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: March 3, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Ulrich Wagner, Klaus Volkamer, Walter Rebafka
  • Patent number: 4553984
    Abstract: CO.sub.2 and/or H.sub.2 S are removed from gases which contain CO.sub.2 and/or H.sub.2 S by a process in which the said gas is treated, in an absorption stage at from 40.degree. to 100.degree. C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO.sub.2 and/or H.sub.
    Type: Grant
    Filed: March 6, 1984
    Date of Patent: November 19, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Eckhart Wagner, Ulrich Wagner
  • Patent number: 4551158
    Abstract: CO.sub.2 and/or H.sub.2 S are removed from gases which contain CO.sub.2 and/or H.sub.2 S by means of an aqueous absorption liquid containing an alkanolamine, by a process wherein the said gas is treated, in an absorption stage, at from 40.degree. to 100.degree. C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO.sub.2 and/or H.sub.2 S is taken off at the bottom of this stage and is regenerated by being let down in two or more flash stages, and the final flash stage is operated under reduced pressure and the regenerated absorption liquid is recycled to the absorption stage.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: November 5, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhart Wagner, Klaus Volkamer, Werner Hefner, Ulrich Wagner
  • Patent number: 4537753
    Abstract: CO.sub.2 and, where relevant, H.sub.2 S are removed from natural gases which contain CO.sub.2 and may or may not contain H.sub.2 S by a process in which the said natural gases are treated, in an absorption stage at from 40.degree. to 100.degree. C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated natural gases are taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO.sub.2 and, where relevant, H.sub.2 S is taken off at the bottom of the absorption stage and then regenerated in one or more flash stages, and the regenerated absorption liquid is recycled to the absorption stage.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: August 27, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhart Wagner, Klaus Volkamer, Ulrich Wagner
  • Patent number: 4448643
    Abstract: A process for isolating isobutene from C.sub.4 -hydrocarbon mixtures containing isobutene by reacting the mixture with a primary alcohol in the presence of an acid condensing agent, to form the tertiary ether, separating off the unconverted hydrocarbons and decomposing the tertiary ether in the presence of an acid catalyst at an elevated temperature, wherein a primary C.sub.3 - or C.sub.4 -alcohol is used and the temperature at which the reaction mixture leaves the etherification stage, in which the tertiary ether is formed, is lower than the mean temperature in the etherification stage.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: May 15, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner
  • Patent number: 4441879
    Abstract: An oil burner for installation in heating or steam-raising boilers. The ber has downstream of an oil atomization device a plate having a single opening or a plurality of openings arranged in a ring coaxially of the oil atomising device, the plate opening or openings being the only throughway for combustion air. A mixing tube is arranged coaxially at a distance downstream of the plate. The mixing tube has a diameter greater than the diameter of the single opening or of a circle which encloses the plurality of openings in the plate. A flame tube positioned coaxially around the mixing tube has a length such that the flow of combustion gases downstream of the mixing tube is applied against the internal wall of the flame tube. To enable the burner alternatively to be used for burning gaseous fuel at will, an annular chamber for the supply of a gaseous fuel and having gas outlet openings in the region of the plate opening or openings is also provided downstream of and close to the plate.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: April 10, 1984
    Assignees: M.A.N. Maschinenfabrik Augsburg-Nurnberg, Deutsche Forschungs-und Versuchsanstalt fur Luft- und Raumfahrt E.V.
    Inventors: Ulrich Wagner, Winfried Buschulte
  • Patent number: 4414004
    Abstract: A process for removing condensable aliphatic hydrocarbons and acidic gases such as H.sub.2 S, CO.sub.2 and COS from natural gas containing these, wherein the natural gas is initially treated with polyethylene glycol dialkyl ethers, as the solvent, in a first absorption stage to effect absorption of the condensable aliphatic hydrocarbons; the natural gas drawn off from the first absorption stage is then treated with polyethylene glycol dialkyl ethers, as the solvent, under superatmospheric pressure in a second absorption stage, the acidic gases being completely or partly absorbed; the solvent charged with the condensable aliphatic hydrocarbons which is obtained from the first absorption stage is treated with water in an extraction stage, to form a hydrocarbon phase containing the condensable aliphatic hydrocarbons and an aqueous dialkyl ether phase, and the hydrocarbon phase is separated from the aqueous dialkyl ether phase.
    Type: Grant
    Filed: March 10, 1982
    Date of Patent: November 8, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhart Wagner, Ulrich Wagner, Klaus Volkamer, Wolfgang Vodrazka
  • Patent number: 4336233
    Abstract: An aqueous solution containing from 0.81 to 1.3 moles of piperazine per liter is used as a washing agent for removing impurities such as H.sub.2 S, CO.sub.2 and COS from gases. Piperazine can also be used, in amounts of up to 0.8 mole per liter, together with physical or chemical solvents, to accelerate the absorption of H.sub.2 S, CO.sub.2 and COS. The washing process is used for natural gases, coke-oven gases, gases from the gasification of coal and synthesis gases, of any origin.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: June 22, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Max Appl, Ulrich Wagner, Hans J. Henrici, Klaus Kuessner, Klaus Volkamer, Ernst Fuerst
  • Patent number: 4320232
    Abstract: A process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene from an isobutene-containing C.sub.4 -hydrocarbon mixture. In the process the C.sub.4 -hydrocarbon mixture is reacted, in one or more etherification stages, with methanol and a primary C.sub.3 - or C.sub.4 -alcohol in the presence of an acid condensing agent, the resulting reaction mixture or mixtures are then separated into a fraction containing the unconverted hydrocarbons, the methyl tert.-butyl ether and a fraction containing the C.sub.3 - or C.sub.4 -alkyl tert.-butyl ether. Thereafter, the C.sub.3 - or C.sub.4 -alkyl tert.-butyl ether is decomposed at an elevated temperature, in the presence of an acid catalyst, into isobutene and primary C.sub.3 - or C.sub.4 -alcohol.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Alfred Lindner, Franz Merger, Ulrich Wagner, Erwin Brunner, Gerhard Sandrock, Max Strohmeyer
  • Patent number: 4310388
    Abstract: A process for isolating a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises(a) from 50 to 99 percent by weight of a selective solvent boiling at from 140.degree. C. to 260.degree. C. and(b) from 1 to 50 percent by weight of an organic solvent boiling at from 45.degree. C. to 125.degree. C.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: January 12, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Klaus Broellos, Alfred Lindner, Ulrich Wagner, Hans-Martin Weitz, Klaus-Juergen Schneider
  • Patent number: 4302220
    Abstract: A process for simultaneously removing water and hydrogen sulfide from gases containing both of these by treating the gases, in an absorption zone under superatmospheric pressure, with polyethylene glycol dialkyl ethers as a solvent, stripping the hydrogen sulfide from the loaded solvent, obtained from the absorption zone, in a desorption zone, removing the water, taken up in the absorption zone, from the solvent and recycling the regenerated solvent to the absorption zone, wherein the solvent additionally contains from 0.01 to 20% by weight, based on the solvent mixture, of an alcohol or ether boiling in the range from 50.degree. to 140.degree. C.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: November 24, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Ulrich Wagner, Eckhart Wagner
  • Patent number: 4292141
    Abstract: A process for isolating butadiene, with the aid of a selective solvent, from a C.sub.4 -hydrocarbon mixture which contains butadiene and small amounts of styrene and may contain oxygen, hydrocarbons more soluble than butadiene in the selective solvent and hydrocarbons less soluble than butadiene in the selective solvent, in which process the C.sub.4 -hydrocarbon mixture is separated by extractive distillation into a distillate which contains the less soluble hydrocarbons, a stream of butadiene and a stream containing the more soluble hydrocarbons, and in which a mixture of styrene and C.sub.4 -hydrocarbons is removed from the C.sub.4 -hydrocarbon mixture in a distillation zone upstream of the extractive distillation, the top product of the said distillation zone being fed to the extractive distillation.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: September 29, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner, Dieter Pommer, Klaus-Juergen Schneider, Harald Schwentker
  • Patent number: 4286051
    Abstract: There is provided a method of engraving a workpiece surface 14 by etching using a thin flexible support foil 18 which carries a dissolvable pattern 20 made of a dye opaque to light. The support foil 18 with the pattern bearing side is deposited on the workpiece surface 14 and the pattern 20 transferred to the workpiece 12, after which the support foil 18 is removed and the surface 14 treated with an etching agent. Prior to the deposition of the pattern 20, a photographic lacquer layer 16 is applied to the surface 14. The lacquer layer 16 is then exposed to light through the pattern 20, after which the exposed or unexposed regions of the lacquer layer 16 are removed and the regions not covered by the lacquer layer 16 are then subjected to etching.
    Type: Grant
    Filed: November 20, 1979
    Date of Patent: August 25, 1981
    Inventor: Ulrich Wagner
  • Patent number: 4278504
    Abstract: A process for isolating a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises(a) from 1 to 99 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and(b) from 1 to 99 percent by weight of an aliphatic or alicyclic ether boiling at from 30.degree. C. to 200.degree. C.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Klaus Brollos, Alfred Lindner, Ulrich Wagner, Hans-Martin Weitz, Klaus-Jurgen Schneider
  • Patent number: 4277314
    Abstract: A process for isolating 1,3-butadiene by means of a selective solvent from a C.sub.4 -hydrocarbon mixture which contains 1,3-butadiene, propyne, hydrocarbons which are more soluble than 1,3-butadiene in the selective solvent and hydrocarbons which are less soluble than 1,3-butadiene in the selective solvent, wherein the C.sub.4 -hydrocarbon mixture is separated, using one or more extractive distillation zones, into a distillate containing the less soluble hydrocarbons, a stream of 1,3-butadiene and a stream containing the more soluble hydrocarbons, and the propyne is separated off either by distillation of the C.sub.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner
  • Patent number: 4277315
    Abstract: A process for isolating a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises(a) from 1 to 99 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and(b) from 1 to 99 percent by weight of an lower aliphatic carboxylic acid ester or carbonic acid ester boiling at from 30.degree. C. to 200.degree. C.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Klaus Broellos, Alfred Lindner, Ulrich Wagner, Hans-Martin Weitz, Klaus-Juergen Schneider
  • Patent number: 4237330
    Abstract: A process for isolating butadiene by means of a selective solvent from a C.sub.4 -hydrocarbon mixture which contains butadiene, small amounts of oxygen, hydrocarbons which are more soluble than butadiene in the selective solvent and hydrocarbons which are less soluble than butadiene in the selective solvent, wherein the C.sub.4 -hydrocarbon mixture is separated, by extractive distillation, into a distillate containing the less soluble hydrocarbons, a stream of butadiene and a stream containing the more soluble hydrocarbons, a mixture of oxygen and C.sub.4 -hydrocarbons is separated out of the C.sub.4 -hydrocarbon mixture in a distillation zone upstream of the extractive distillation, and the bottom product is fed to the extractive distillation.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: December 2, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner
  • Patent number: 4178309
    Abstract: A process for the manufacture of symmetrical dialkylureas by reacting monoalkylamines with CO.sub.2 at an elevated temperature and under superatmospheric pressure, in which the unconverted starting materials, water and the by-products formed in the reaction zone, as well as alkylamine alkylcarbamate, after thermal decomposition into monoalkylamine, CO.sub.2 and water, are separated from the dialkylurea formed, and thereafter a part of the unconverted starting materials plus by-products, with or without water, may or may not be recycled to the reaction zone, before isolating an aqueous solution, containing monoalkylamines, CO.sub.2 and other by-products, which solution is treated with alkali metal hydroxide solution in a column, the monoalkylamine, after separation from carbon dioxide and water, being recycled to the reaction zone. The dialkylureas obtained contain not more than 1% of monoalkylurea and 1% of trialkylurea, and may be used as starting materials for various syntheses.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: December 11, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietrich Luetzow, Norbert Neth, Ulrich Wagner, Klaus Volkamer
  • Patent number: 4162198
    Abstract: A process for separating, by means of a selective solvent, a mixture of C.sub.
    Type: Grant
    Filed: May 17, 1978
    Date of Patent: July 24, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Stockburger, Klaus Volkamer, Detlef Bender, Klaus-Juergen Schneider, Harald Schwentker, Ulrich Wagner, Hans-Martin Weitz
  • Patent number: 4049742
    Abstract: 1,3-Butadiene is recovered with the aid of a selective solvent from a C.sub.4 -hydocarbon mixture containing 1,3-butadiene, hydrocarbons which are more soluble in said selective solvent than 1,3-butadiene, including acetylenes and possibly 1,2-butadiene and C.sub.5 -hydrocarbons, and hydrocarbons which are less soluble in said selective solvent than 1,3-butadiene. The C.sub.4 -hydrocarbon mixture is separated by the use of one or more extractive distilling zones into a distillate containing the less soluble hydrocarbons, a stream consisting of 1,3-butadiene and a stream containing the more soluble hydrocarbons including the higher acetylenes and 1,3-butadiene, the latter stream being subjected to catalytic hydrogenation.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Ulrich Wagner, Klaus Volkamer, Eckart Schubert, Friedhelm Bandermann