Patents by Inventor Siegfried Warwel

Siegfried Warwel 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).

  • Single-stage method for producing &agr;-hydroxy ethers by oxidizing C=C unsaturated compounds with hydroperoxides
    Patent number: 6608230
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 19, 2003
    Assignee: WE-DEA Aktiengesellschaft für Mineraloel und Chemie
    Inventors: Mark Rüsch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Amphiphilic compounds with at least two hydrophilic and at least two hydrophobic groups on a di-,oligo- or polyene base
    Patent number: 6593376
    Abstract: A process for preparing amphiphilic compounds having at least two hydrophilic and at least two hydrophobic groups by reacting an olefinic substrate having at least two double bonds with an organic hydroperoxide to form an oxirane ring, opening, the oxirane ring with an alcohol in the presence of a catalyst system comprising a molybdenum compound as a first catalyst component and a second catalyst component selected from the group consisting of boron trifluoride, alumina, 1,8-diazzabicyclo-(5.4.0)-undec-7-ene, 1,4-diazabicyclo-(2,2,2)-octane.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 15, 2003
    Assignee: SASOL Germany GmbH
    Inventors: Mark Rüsch gen. Klaas, Klaus Kwetkat, Siegfried Warwel
  • Single-stage method for producing alpha-hydroxy ethers by oxidizing C=C unsaturated compounds with hydroperoxides
    Publication number: 20020072637
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 13, 2002
    Inventors: Mark Rusch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Single-stage method for producing &agr;-hydroxy ethers by oxidizing C=C-unsaturated compounds with hydroperoxides
    Patent number: 6380439
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: April 30, 2002
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Mark Rüsch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Process for the preparation of vicinal diols and/or epoxides
    Patent number: 5344946
    Abstract: The present invention provides a process for the preparation of vicinal diols and/or epoxides by the oxidation of olefinically-unsaturated compounds with the use of an inorganic heptavalent rhenium compound as catalyst and of hydrogen peroxide as oxidation agent, wherein the reaction is carried out in a solvent selected from the group consisting of organic phosphoric acid esters and ethers with a boiling point above 50.degree. C. under atmospheric conditions.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: September 6, 1994
    Assignee: Solvay Interox GmbH
    Inventors: Siegfried Warwel, Mark R. Klaas, Michael Sojka
  • Production of carboxylic acids
    Patent number: 5321158
    Abstract: An improved process for the production of carboxylic acids and dicarboxylic acids by the catalytic oxidation of olefins and vicinal diols by hydrogen peroxide is provided. The process employs a rhenium (VII) catalyst, and a solvent comprising a mixture of a carboxylic acid or anhydride having 2 or more carbon atoms and a high boiling cyclic or acyclic ether. Particularly suitable carboxylic acids or anhydrides include acetic acid, propionic acid and acetic anhydride. Particularly suitable high-boiling ethers include 1,4-dioxane and diglyme.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: June 14, 1994
    Assignee: Solvay Interox GmbH
    Inventors: Siegfried Warwel, Mark R. G. Klaas
  • Process for the metathesis of olefins and functionalized olefins
    Patent number: 5218131
    Abstract: A process for the metathesis of olefins and functionalized olefins on Re.sub.2 O.sub.7 /Al.sub.2 O.sub.3 -containing catalysts, which comprises effecting metathesis reaction in the presence of one or more halogen-free organoaluminum compounds as activators.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: June 8, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Siegfried Warwel, Hans-Gerd Jagers, Barbara Ercklentz
  • Catalysts for the metathesis of olefins and functionalized olefins
    Patent number: 5183791
    Abstract: A catalyst for the metathesis of olefins and functionalized olefins, which contains a compound having the formula B.sub.2 O.sub.3 -Re.sub.2 O.sub.7 /Al.sub.2 O.sub.3 -SiO.sub.2.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: February 2, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Siegfried Warwel, Hans-Gerd Jagers, Andreas Deckers
  • Catalysts for the metathesis of olefins and functionalized olefins
    Patent number: 5143885
    Abstract: A catalyst for the metathesis of olefins and functionalized olefins, which contains a compound having the formula B.sub.2 O.sub.3 --Re.sub.2 O.sub.7 /Al.sub.2 O.sub.3 --SiO.sub.2.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: September 1, 1992
    Assignee: Huls Aktiengesellschaft
    Inventors: Siegfried Warwel, Hans-Gerd Jagers, Andreas Deckers