Patents by Inventor Rui Pan

Rui Pan 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 systems and methods for carbonylation
    Patent number: 5731255
    Abstract: A carbonylation catalytic system comprises (A) a combination of (A1) a Group VIII metal source of Periodic Table of the Elements (e.g., palladium, palladium chloride) supported on a carrier, (A2) a ligand such as triphenylphosphine and (A3) an acid such as an alkyl-sulfonic acid, or (B) a combination of (B1) the Group VIII metal source except for palladium (e.g., a platinum compound), (B2) a ligand such as triphenylphosphine and (B3) an electron donative compound having an electron donability .DELTA..nu.D of not less than 2 (for instance, an amine such as a heterocyclic tertiary amine). The catalytic system (B) may further comprise (B4) an acid such as methanesulfonic acid.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: March 24, 1998
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Li Rui Pan, Tomohide Ina, Kazuyuki Matsuoka