Patents by Inventor Radmila Wollrab

Radmila Wollrab 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 Having Promoter Metals and Process for Producing Ethanol
    Publication number: 20130165701
    Abstract: The present invention relates to a catalyst. The catalyst is used for converting acetic acid to ethanol. The catalyst comprises platinum, tin, a base metal selected from calcium and/or tungsten and a promoter metal selected from barium, potassium and/or cesium.
    Type: Application
    Filed: May 24, 2012
    Publication date: June 27, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Zhenhua Zhou, Victor Johnston, Heiko Weiner, Radmila Wollrab
  • Process For Producing Ethanol By Hydrogenating Mixed Feeds Comprising Water
    Publication number: 20130158300
    Abstract: The processes of the current invention relate to the production of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid and ethyl acetate. Conversion of ethyl acetate may be improved by controlling the water content that may be fed to the vaporizer to form a feed stream that may be fed to the hydrogenation reactor. At least 0.01 wt. % water is fed to the vaporizer. The crude ethanol product is separated two or more columns to yield an ethanol product.
    Type: Application
    Filed: July 6, 2012
    Publication date: June 20, 2013
    Applicant: Celanese International Corporation
    Inventors: Radmila Wollrab, Zhenhua Zhou, Victor J. Johnston, David Lee, R. Jay Warner, Heiko Weiner
  • Multiple Vapor Feeds for Hydrogenation Process to Produce Alcohol
    Publication number: 20130158301
    Abstract: The present invention relates to processes for the recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. The crude ethanol product is separated in a column to produce a distillate stream comprising ethyl acetate, ethanol and acetaldehyde and a residue stream comprising ethanol, acetic acid and water. The ethanol product is recovered from the residue stream. A liquid recycle stream is sent to a second vaporizer to form a second vapor feed stream that is fed to the hydrogenation reactor.
    Type: Application
    Filed: July 12, 2012
    Publication date: June 20, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Radmila Wollrab, Victor Johnston
  • PROCESS FOR PURIFYING ETHANOL
    Publication number: 20130046113
    Abstract: Purifying and/or recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of crude ethanol mixture are employed to allow recovery of ethanol and remove impurities. In addition, the process involves returning acetaldehyde separated from the crude ethanol product to the reactor.
    Type: Application
    Filed: September 11, 2012
    Publication date: February 21, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Radmila Wollrab, Nathan Bower, Josefina T. Chapman, Gerald Grusendorf, Victor J. Johnston, Lincoln Sarager, R. Jay Warner, Heiko Weiner