Patents by Inventor Pi-Fwu Jang

Pi-Fwu Jang 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).

  • Catalytic oxacylation vapor phase process
    Patent number: 7265243
    Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: September 4, 2007
    Assignee: Dairen Chemical Corporation
    Inventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Pi-Fwu Jang
  • Catalyst for oxacylation and use of the same
    Publication number: 20040236121
    Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.
    Type: Application
    Filed: March 1, 2004
    Publication date: November 25, 2004
    Applicant: Dairen Chemical Corporation
    Inventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Pi-Fwu Jang
  • CATALYST FOR OXACYLATION AND USE OF THE SAME
    Publication number: 20030148882
    Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.
    Type: Application
    Filed: December 3, 1999
    Publication date: August 7, 2003
    Inventors: SHIEN-CHANG CHEN, FU-SHEN LIN, LIANG-AN HSU, PI-FWU JANG
  • Process of preparing catalyst for producing alkenyl acetates
    Patent number: 6303536
    Abstract: This invention relates to a preparation process of a catalyst which comprises a noble metal and a metal as catalysis promoter in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a carrier. The preparation process comprises impregnating the carrier with a solution containing an oxidative state noble metal as the main catalyst and an oxidative state metal as catalysis promoter, reducing the oxidative state metals into the metallic state in gaseous phase with a gaseous reducing agent under certain temperature, pressure, moisture and gas concentration, then impregnating the reduced carrier with a solution of an alkali or alkaline earth metal compound. The metal components-supporting catalyst prepared by the process according to the present invention has a high surface area and exhibits high catalytic activity, which leads to increase the catalytic efficiency and life of this heterogeneous catalyst.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: October 16, 2001
    Assignee: Dairen Chemical Coorporation
    Inventors: Shien-Chang Chen, Fu-Shen Lin, Yuh-Lih Jong, Pi-Fwu Jang