Patents by Inventor Shelue Liang

Shelue Liang 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).

  • Preparation of tetrahydrofuran
    Patent number: 6316640
    Abstract: In a process for preparing THF (tetrahydrofuran) by reaction of a 1,4-butanediol-containing reaction mixture over an acid catalyst, the reaction mixture comprises further alcohols different from 1,4-butanediol and is essentially free of water.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: November 13, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fischer, Shelue Liang, Rolf Pinkos
  • Preparation of alcohols
    Patent number: 6140545
    Abstract: In a process for preparing alcohols by gas phase hydrogenation of carboxylic acids or esters thereof at elevated temperature and elevated pressure in the presence of catalysts consisting of or comprising, as hydrogenating components, oxides of main group VI and/or subgroup IV, the hydrogenation is carried outa) at from 250.degree. C. to 400.degree. C. and from 5 bar to 100 bar in the presence ofb) primary or secondary alcohols, the molar hydrogen/alcohol ratio being at most 800.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: October 31, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Merger, Shelue Liang, Rolf Fischer, Joachim Wulff-Doring