Patents by Inventor Eva Kretzschmar

Eva Kretzschmar 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 NEOPENTYL GLYCOL
    Publication number: 20120271029
    Abstract: The present invention relates to a process for preparing hydroxypivalaldehyde (HPA), which comprises in a first stage reacting isobutyraldehyde with formaldehyde in the presence of a tertiary amine and in a second stage introducing the reaction output obtained from the first stage into a stripping column. The present application further relates to a process for preparing neopentyl glycol (NPG) by hydrogenating the hydroxypivalaldehyde prepared in accordance with the invention and the further conversion of the NPG thus obtained to polyester resins, unsaturated polyester resins, lubricants or plasticizers.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 25, 2012
    Applicant: BASF SE
    Inventors: Helmut Kronemayer, Michael Steiniger, Eva Kretzschmar, Norbert Asprion, Marcus Bechtel
  • Process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm
    Patent number: 8148581
    Abstract: The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 3, 2012
    Assignee: BASF SE
    Inventors: Rolf Pinkos, Eva Kretzschmar, Olivier Abillard, Lionel Gehringer
  • PROCESS FOR PREPARING EPSILON-CAPROLACTONE AND 1,6-HEXANEDIOL
    Publication number: 20120059174
    Abstract: The invention relates to processes for preparing 1,6-hexanediol and very pure ?-caprolactone from a dicarboxylic acid solution (DCS), comprising the steps of (a) esterification of the DCS with alcohols, (b) partial catalytic hydrogenation of the esters, (c) distillative removal of 1,6-hexanediol and low boilers as the top product, and (d) cyclization of the 6-hydroxycaproic ester present in the bottoms fraction in the presence of a higher-boiling alcohol than caprolactone.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 8, 2012
    Applicant: BASF SE
    Inventors: Olivier ABILLARD, Daniel BREUNINGER, Eva KRETZSCHMAR, Rolf PINKOS
  • PROCESS FOR PREPARING PLASTICS USING 1,6-HEXANEDIOL HAVING AN ALDEHYDE CONTENT OF LESS THAN 500 PPM
    Publication number: 20110124905
    Abstract: The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 26, 2011
    Applicant: BASF SE
    Inventors: Rolf PINKOS, Eva Kretzschmar, Olivier Abillard, Lionel Gehringer