1
Wilhelm Ruppel, Ulrike Wegerle, Andreas Tenten, Ulrich Hammon: Catalytic gas-phase oxidation of acrolein to acrylic acid. BASF Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt P C, April 14, 1998: US05739391 (63 worldwide citation)

A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a multiple contact tube fixed-bed reactor through whose space surrounding the contact tubes only one heat-exchange medium circuit is passed, at elevated temperature on catalytically active multimetal oxides with an acrole ...


2
Wilhelm Ruppel, Ulrike Wegerle, Andreas Tenten, Ulrich Hammon: Catalytic gas-phase oxidation of propene to acrolein. BASF Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt P C, October 13, 1998: US05821390 (43 worldwide citation)

A gas-phase mixture of propene and oxygen is catalytically oxidized by passing a reactant gas mixture comprising propene and oxygen through a plurality of catalyst containing contact tubes in a fixed bed reactor and simultaneously passing only one heat-exchange medium at elevated temperature over th ...


3
Werner Hefner, Otto Machhammer, Hans Peter Neumann, Andreas Tenten, Wilhelm Ruppel, Herbert Vogel: Preparation of acrolein, acrylic acid or a mixture thereof from propane. BASF Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt P C, January 6, 1998: US05705684 (26 worldwide citation)

In a process for preparing acrolein, acrylic acid or a mixture thereof from propane, propane is partially dehydrogenated to propylene in a first stage, the product gas mixture resulting therefrom is, after separating off hydrogen and water vapor, used as feed to an oxidation reactor, the propylene f ...


4
Karl Brenner, Wilhelm Ruppel, Otto Woerz, Klaus Halbritter, Hans Juergen Scheiper, Werner Aquila, Hartwig Fuchs: Tube bundle reactor, use thereof in exothermic organic reactions, and preparation of ketones and aldehydes using same. BASF Aktiengesellschaft, Keil & Weinkauf, September 22, 1992: US05149884 (23 worldwide citation)

In a tube bundle reactor for carrying out catalytic organic reactions in the gas phase, comprising reaction tubes (A) arranged between tubesheets (B), the reaction tubes have an inside diameter ranging from 0.5 to 3 cm, the ratio of reaction tube length to inside diameter ranges from 2 to 10, and th ...


5
Thomas Fetzer, Eckhart Wagner, Emil Roth, Wilhelm Ruppel, Hermann Wistuba, Bernhard Otto, Volker Schumacher, Gert Burger: Method of removing nitrogen oxides from a gas flow. BASF Aktiengesellschaft, Keil & Weinkauf, May 2, 2000: US06056928 (19 worldwide citation)

The invention relates to a process for removing nitrogen oxides from a gas stream containing same, which comprises passing the gas stream


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Hans Martan, Ulrike Wegerle, Wilhelm Ruppel, Lothar Riekert, Dieter Becker, Michael Kotter: Preparation of acrolein or methacrolein by actalytic gas-phase oxidation of propene or isobutene. BASF Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt, September 1, 1992: US05144091 (13 worldwide citation)

A process for the catalytic gas-phase oxidation of propene or isobutene to acrolein or methacrolein in a tubular fixed bed reactor or catalytically active oxides with a .gtoreq.90% conversion of the initial olefin on a single passage, wherein the temperature of the gases containing the reactants in ...


8
Heinrich Aichinger, Wilhelm Ruppel, Rolf Seubert, Karl Heinz Boehning, Walter Scheidmeir, Johannes E Schmidt, Matthias Schwarzmann: Preparation of phthalic anhydride from o-xylene. BASF Aktiengesellschaft, Keil & Weinkauf, July 6, 1993: US05225574 (10 worldwide citation)

Phthalic anhydride is prepared in a multiple tube reactor provided with separate salt baths, the temperature of the salt bath used for cooling the first layer of catalyst, as regarded in the direction of flow of the reaction mixture, being from 2.degree. to 20.degree. C. higher than that of the salt ...


9
Werner Hefner, Otto Machhammer, Hans Peter Neumann, Andreas Tenten, Wilhelm Ruppel, Herbert Vogel: Continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or a mixture thereof. BASF Aktiengesellschaft, Oblon Spivak McClelland Maier & Neustadt P C, November 4, 1997: US05684188 (9 worldwide citation)

In a process for the continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or a mixture thereof in an oxidation reactor whose feed gas mixture comprises, apart from propylene and molecular oxygen as oxidant, only at least one diluent gas which is essentially ...


10
Werner Aquila, Hartwig Fuchs, Otto Worz, Wilhelm Ruppel, Klaus Halbritter: Continuous industrial production of unsaturated aliphatic aldehydes in a tube bundle reactor. BASF Aktiengeselllschaft, Oblon Spivak McClelland Maier & Neustadt P C, January 11, 2000: US06013843 (9 worldwide citation)

A process for continuous industrial production of unsaturated aliphatic aldehydes having a boiling range from 95 to 136.degree. C. by oxidative dehydrogenation of the corresponding alcohols with an oxygen-comprising gas over a supported catalyst consisting of copper, silver and/or gold on an inert s ...