Patents by Inventor Dirk Buehring

Dirk Buehring 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: 8071814
    Abstract: The invention provides a process for preparing polyetheramines of the formula (1), R2 (NR1R3)n, in which n is a number from 1 to 20, R2 represents an organic radical that contains between 2 and 600 oxalkylene groups, and R1 and R3 are alike or different and represent hydrogen or an organic radical having 1 to 400 carbon atoms, by combining a compound of the formula (2), H(NR1R3), with a compound of the formula (3), R2 (OH)n, in the presence of hydrogen with a metal-containing catalyst whose metal content, based on the dry, reduced catalyst excluding any support material that may be present, is composed either of at least 80% by mass of cobalt or, in the case of Raney catalysts, of at least 80% by mass of metals from the group consisting of cobalt and aluminium, the catalyst containing less than 5% by mass of copper.
    Type: Grant
    Filed: July 7, 2007
    Date of Patent: December 6, 2011
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Dirk Buehring, Andreas Gallas, Klaus Raab, Franz-Xaver Scherl, Olaf Wachsen
  • Publication number: 20110071323
    Abstract: The invention relates to a method for producing 1,2-propanediol, in that a liquid phase comprising at least 95 wt.-% glycerin is reacted with hydrogen in the presence of a copper-containing, powdered catalyst in a continuously operated stirred reactor at a pressure of 50 to 90 bar, wherein the stationary yield of the reaction is at least 60%.
    Type: Application
    Filed: May 27, 2009
    Publication date: March 24, 2011
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Achim Stankowiak, Oliver Franke, Joerg Appel, Dirk Buehring, Olaf Wachsen
  • Patent number: 7696385
    Abstract: The invention relates to a method for producing amines of formula (1), wherein R3 is an organic group containing from 2 to 600 alkoxy groups and R1 and R3 groups are similar or different and represent a hydrogen atom or an organic group containing from 1 to 400 carbon atoms. The inventive method consists in bringing a compound of formula (2) into contact a compound of formula (3) in the presence of hydrogen with a metal-containing catalyst, wherein the metal content in cobalt is equal to or greater than 80% by weight.
    Type: Grant
    Filed: June 10, 2006
    Date of Patent: April 13, 2010
    Assignee: Clariant Produkte (Deutschland) GmbH
    Inventors: Dirk Buehring, Andreas Gallas, Martin Glos, Klaus Raab, Franz-Xaver Scherl, Olaf Wachsen
  • Publication number: 20100069671
    Abstract: The invention provides a process for preparing polyetheramines of the formula (1), R2 (NR1R3)n, in which n is a number from 1 to 20, R2 represents an organic radical that contains between 2 and 600 oxalkylene groups, and R1 and R3 are alike or different and represent hydrogen or an organic radical having 1 to 400 carbon atoms, by combining a compound of the formula (2), H(NR1R3), with a compound of the formula (3), R2 (OH)n, in the presence of hydrogen with a metal-containing catalyst whose metal content, based on the dry, reduced catalyst excluding any support material that may be present, is composed either of at least 80% by mass of cobalt or, in the case of Raney catalysts, of at least 80% by mass of metals from the group consisting of cobalt and aluminium, the catalyst containing less than 5% by mass of copper.
    Type: Application
    Filed: July 7, 2007
    Publication date: March 18, 2010
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Dirk Buehring, Andreas Gallas, Klaus Raab, Franz-Xaver Scherl, Olaf Wachsen
  • Publication number: 20090177013
    Abstract: The invention relates to a method for producing amines of formula (1), wherein R3 is an organic group containing from 2 to 600 alkoxy groups and R1 and R3 groups are similar or different and represent a hydrogen atom or an organic group containing from 1 to 400 carbon atoms. The inventive method consists in bringing a compound of formula (2) into contact a compound of formula (3) in the presence of hydrogen with a metal-containing catalyst, wherein the metal content in cobalt is equal to or greater than 80% by weight.
    Type: Application
    Filed: June 10, 2006
    Publication date: July 9, 2009
    Inventors: Dirk Buehring, Andreas Gallas, Martin Glos, Klaus Raab, Franz-Xaver Scherl, Olaf Wachsen