Patents by Inventor Volker Falk

Volker Falk 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).

  • Catalysts and methods of separation thereof
    Patent number: 5124485
    Abstract: A method of preparation of a cobalt catalyst particularly adapted for hydrogenation of nitriles, the catalyst which is the product of the method, and the method of use thereof.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 23, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Weber, Volker Falk, Gerhardt Horn, Hanswilhelm Bach, Klaus Mathieu, Claus Kniep
  • 2-alkylidene-3,3,5(3,5,5)-trimethyl cyclopentanones
    Patent number: 4904640
    Abstract: 2-Alkylidene-3,3,5(3,5,5)-trimethylcyclopentanones corresponding to the following general formula ##STR1## in which three of the substituents R.sub.1 to R.sub.4 are CH.sub.3, one of the substituents R.sub.1 to R.sub.4 is H, and R.sub.5 is a saturated or unsaturated, linear branched C.sub.1 -C.sub.7 alkyl radical, and the double bond is in the endo position to the cyclopentanone structure. The compounds of formula (I) are useful as perfumes.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: February 27, 1990
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Thomas Markert, Klaus Bruns, Horst-Juergen Krause, Josef Penninger, Michael Virnig, Volker Falk
  • Process for preparing 3-dimethylamino-2,2-dimethylpropanal
    Patent number: 4515986
    Abstract: An improved process for preparing 3-dimethylamino-2,2-dimethylpropanal from isobutyraldehyde, dimethylamine and a source of formaldehyde is disclosed wherein the process is carried out at a pH value of 9 to 11.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: May 7, 1985
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Wolfgang Bernhagen, Volker Falk, Helmut Springer, Jurgen Weber, Ernst Wiebus, Claus Kniep
  • Stabilization of aldehydes
    Patent number: 4414419
    Abstract: Aldehydes having 3 to 14 carbon atoms are stabilized against polymerization and autocondensation by the addition thereto of triethanolamine or dimethylethanolamine in an amount at least 10 ppm (based on the amount of aldehyde) and preferably 20 to 100 ppm.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: November 8, 1983
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Jurgen Weber, Volker Falk, Claus Kniep
  • N,N-Dimethyl-N'-isobutyl-N'-.beta.-hydroxyethyl-propylenediamine and a process for its preparation
    Patent number: 4324918
    Abstract: There are disclosed the chemical compound N,N-dimethyl-N'-isobutyl-N'-.beta.-hydroxyethyl-propylenediamine, a process for the preparation thereof and its use.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: April 13, 1982
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Jurgen Weber, Volker Falk, Claus Kniep
  • Process for the production of di-n-propyl-acetic acid
    Patent number: 4311854
    Abstract: A process for the preparation of di-n-propyl-acetic acid, comprising the steps of:A. catalytically reacting n-butyric acid with cleavage of carbon dioxide and water to form heptanone-4;B. hydrogenating heptanone-4 in teh presence of a catalyst to form heptanol-4;C. dehydrating heptanol-4 in the presence of an Al.sub.2 O.sub.3 catalyst to form heptene-3;D. hydroformylating heptene-3 in the presence of a rhodium complex compound as catalyst to form a mixture of 2-propyl pentanal and 2-ethyl hexanal;E. oxidizing the 2-propyl pentanal/2-ethyl hexanal mixture to form a mixture of di-n-propyl acetic acid and 2-ethyl hexanoic acid, andF. separating the mixture of di-n-propyl acetic acid and 2-ethyl hexanoic acid to recover pure di-n-propyl acetic acid.If desired, step B can be carried out without purification of the product of step A. Moreover, the dehydration of step C can be carried out without previous purification of the product of step B.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: January 19, 1982
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Jurgen Weber, Volker Falk, Claus Kniep