Patents by Inventor Juergen Lippe

Juergen Lippe 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 preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine
    Patent number: 9085506
    Abstract: The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: July 21, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Markus Galle, Gerda Grund, Axel Hengstermann, Michael D Hinton, Rolf Hirsch, Robert Jansen, Cord Knoop, Christian Lettmann, Juergen Lippe, Martin Maier, Joerg-Joachim Nitz, Matthias Orschel, Martina Ortelt, Norbert Richter, Armin Rix, Markus Schwarz, Guido Streukens
  • PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE
    Publication number: 20130253226
    Abstract: The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine.
    Type: Application
    Filed: November 18, 2011
    Publication date: September 26, 2013
    Applicant: Evonik Degussa GmbH
    Inventors: Markus Galle, Gerda Grund, Axel Hengstermann, Michael D. Hinton, Rolf Hirsch, Robert Jansen, Cord Knoop, Christian Lettmann, Juergen Lippe, Martin Maier, Joerg-Joachim Nitz, Matthias Orschel, Martina Ortelt, Norbert Richter, Armin Rix, Markus Schwarz, Guido Streukens
  • Method for production of trimethylhexamethylenediamine
    Patent number: 8003826
    Abstract: The invention relates to an improved process for preparing trimethylhexamethylenediamine, hereinafter referred to as TMD for short, by hydrogenation of trimethylhexamethylenedinitrile, hereinafter referred to as TMN for short, in the presence of a shaped hydrogenation catalyst of the Raney type.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: August 23, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Christian Lettmann, Gerda Grund, Juergen Lippe, Cord Knoop
  • METHOD FOR PRODUCTION OF TRIMETHYLHEXAMETHYLENEDIAMINE
    Publication number: 20100094058
    Abstract: Process for preparing trimethylhexamethylenediamine The invention relates to an improved process for preparing trimethylhexamethylenediamine, hereinafter referred to as TMD for short, by hydrogenation of trimethylhexamethylenedinitrile, hereinafter referred to as TMN for short, in the presence of a shaped hydrogenation catalyst of the Raney type.
    Type: Application
    Filed: January 30, 2008
    Publication date: April 15, 2010
    Applicant: Evonik Degussa GmbH
    Inventors: Christian Lettmann, Gerda Grund, Juergen Lippe, Cord Knoop
  • PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE
    Publication number: 20100041921
    Abstract: The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or IPD for short, by aminating hydrogenation of 3-cyano-3,5,5-trimethylcyclohexanone, referred to hereinafter as isophoronenitrile or IPN for short, in the presence of a shaped Raney hydrogenation catalyst.
    Type: Application
    Filed: January 25, 2008
    Publication date: February 18, 2010
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Christian Lettmann, Gerda Grund, Juergen Lippe, Cord Knoop
  • PROCESS FOR PREPARING AMINES BY CONDITIONING THE CATALYST WITH AMMONIA
    Publication number: 20090048466
    Abstract: The invention relates to a process for preparing amines by conditioning the catalyst with ammonia.
    Type: Application
    Filed: November 29, 2006
    Publication date: February 19, 2009
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Christian Lettmann, Juergen Lippe