Patents by Inventor Wolfgang Wenger

Wolfgang Wenger 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).

  • Process for removing hydrogen cyanide from ethanedinitrile
    Patent number: 8337796
    Abstract: Process for removing hydrogen cyanide from ethanedinitrile by contacting hydrogen cyanide-containing ethanedinitrile with an organic reagent under formation of a covalent bond.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: December 25, 2012
    Assignee: Lonza AG
    Inventors: Paul Hanselmann, Ellen Klegraf, Wolfgang Wenger
  • Tricyanoborates
    Patent number: 8283497
    Abstract: The present invention relates to novel tricyanoborates of the general formula Catn+[B(CN)3(XR1)]—n, wherein R1 is C1-6 alkyl, C2-6 alkenyl, C6-10 aryl or benzyl; X is oxygen or sulfur; and Catn+ is a cation with n being 1 or 2, which is selected from the group consisting of an inorganic cation and an organic cation; and also their preparation and use.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: October 9, 2012
    Assignee: Lonza Ltd.
    Inventors: Wolfgang Wenger, Cornelia Zur Taschler
  • Novel Tricyanoborates
    Publication number: 20120018676
    Abstract: The present invention relates to novel tricyanoborates of the general formula Catn+ [B(CN)3(XR1)]—n, wherein R1 is C1-6 alkyl, C2-6 alkenyl, C6-10 aryl or benzyl; X is oxygen or sulfur; and Catn+ is a cation with n being 1 or 2, which is selected from the group consisting of an inorganic cation and an organic cation; and also their preparation and use.
    Type: Application
    Filed: January 26, 2010
    Publication date: January 26, 2012
    Applicant: LONZA LTD.
    Inventors: Wolfgang Wenger, Cornelia Zur Taschler
  • Process for the selective preparation of acetaldehyde from acrolein and one or more ammonium salts dissolved in water
    Patent number: 8044246
    Abstract: The present invention relates to a process for the selective preparation of acetaldehyde, characterized in that acrolein and one or more ammonium salts dissolved in water are reacted continuously under high pressures and at temperatures of 300-400° C.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: October 25, 2011
    Assignee: Lonza Ltd.
    Inventors: Wolfgang Wenger, Andreas Heyl, Lothar Ott, Herbert Vogel, Paul Hanselmann, Gökhan Aras
  • PROCESS FOR REMOVING HYDROGEN CYANIDE FROM ETHANEDINITRILE
    Publication number: 20110195012
    Abstract: Process for removing hydrogen cyanide from ethanedinitrile by contacting hydrogen cyanide-containing ethanedinitrile with an organic reagent under formation of a covalent bond.
    Type: Application
    Filed: September 15, 2009
    Publication date: August 11, 2011
    Inventors: Paul Hanselmann, Ellen Klegraf, Wolfgang Wenger
  • PROCESS FOR THE SELECTIVE PREPARATION OF ACETALDEHYDE FROM ACROLEIN AND ONE OR MORE AMMONIUM SALTS DISSOLVED IN WATER
    Publication number: 20110028764
    Abstract: The present invention relates to a process for the selective preparation of acetaldehyde, characterized in that acrolein and one or more ammonium salts dissolved in water are reacted continuously under high pressures and at temperatures of 300-400° C.
    Type: Application
    Filed: July 27, 2010
    Publication date: February 3, 2011
    Inventors: Wolfgang WENGER, Andreas HEYL, Lothar OTT, Herbert VOGEL, Paul HANSELMANN, Gökhan ARAS
  • PROCESS FOR THE SELECTIVE PREPARATION OF 3-METHYLPYRIDINE (3-PICOLINE) FROM ACROLEIN AND ONE OR MORE AMMONIUM SALTS DISSOLVED IN WATER
    Publication number: 20110028727
    Abstract: The present invention relates to a process for the selective preparation of 3-methylpyridine, characterized in that acrolein and one or more ammonium salt(s) dissolved in water are reacted continuously under high pressures and at temperatures of 200-400° C.
    Type: Application
    Filed: July 27, 2010
    Publication date: February 3, 2011
    Inventors: Wolfgang WENGER, Andreas HEYL, Lothar OTT, Herbert VOGEL, Paul HANSELMANN, Gökhan ARAS
  • PROCESS FOR PURIFYING AN a-KETO ESTER
    Publication number: 20110009663
    Abstract: Process for purifying an ?-keto ester by removing secondary and tertiary alcohols from the ?-keto ester. In a first step, the ?-keto ester to be purified is treated with a carboxylic anhydride and an acid, which is essentially insoluble under the filtration conditions, to esterify the secondary and tertiary alcohols. Subsequent filtration to remove the acid followed by distillation affords the desired purified ?-keto ester.
    Type: Application
    Filed: April 8, 2009
    Publication date: January 13, 2011
    Inventors: Wolfgang Wenger, Anke-Dorothee Braun
  • PROCESS FOR THE PREPARATION OF ALKYL 3,3-DIALKOXYPROPIONATES
    Publication number: 20100217031
    Abstract: The present invention relates to a continuous process for preparing alkyl 3,3-dialkoxy-propionates of the formula (RO)2CHCH2CO2R, wherein R is C1-6 alkyl, by reacting ketene with an ortho formate of formula (RO)3CH in the presence of an acidic catalyst, characterized in that the reaction is carried out in a loop reactor.
    Type: Application
    Filed: October 29, 2008
    Publication date: August 26, 2010
    Inventors: Wolfgang Wenger, Cornelia Zur Täschler, Daniel Zollinger
  • Method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters
    Patent number: 7781601
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxohexanic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: August 24, 2010
    Assignee: Basel
    Inventors: Paul Hanselmann, Wolfgang Wenger
  • Method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters
    Publication number: 20080161582
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxohexanic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Application
    Filed: February 28, 2008
    Publication date: July 3, 2008
    Inventors: Paul Hanselmann, Wolfgang Wenger
  • Method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters
    Patent number: 7351851
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: April 1, 2008
    Assignee: Lonza AG
    Inventors: Paul Hanselmann, Wolfgang Wenger
  • Method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters
    Patent number: 7348450
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxhexanoic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: March 25, 2008
    Assignee: Lonza Ltd.
    Inventors: Paul Hanselmann, Wolfgang Wenger
  • Method for the production of 6,6,6-tirhalo-3,5-dioxohexanoic acid esters
    Publication number: 20070083061
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxohexanic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Application
    Filed: October 22, 2004
    Publication date: April 12, 2007
    Inventors: Paul Hanselmann, Wolfgang Wenger
  • Method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters
    Publication number: 20060235240
    Abstract: A method for the production of 6,6,6-trihalo-3,5-dioxohexanic acid esters of formula (I): in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
    Type: Application
    Filed: May 3, 2006
    Publication date: October 19, 2006
    Inventors: Paul Hanselmann, Wolfgang Wenger