Patents by Inventor Pisanu Toochinda

Pisanu Toochinda 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).

  • Synthesis of carbamate through low pressure heterogeneous oxidative carbonylation of amines
    Patent number: 6541653
    Abstract: The process disclosed herein satisfies the need in the art for an industrially viable oxidative carbonylation catalytic system, and is capable of producing carbamates at a significantly higher rate than those processes reported in journal and patent literature. This reaction process takes place via a reaction mechanism that does not involve drastic conditions. Specifically, the catalytic system of the present invention employs Group VIII metal catalysts and/or copper-based catalysts with halide promoters to produce carbamates through heterogeneous oxidative carbonylation at atmospheric pressure and relatively non-drastic temperatures in a gas-solid carbonylation process.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: April 1, 2003
    Inventors: Steven S. C. Chuang, Yawu Chi, Bei Chen, Pisanu Toochinda
  • SYNTHESIS OF CARBAMATE THROUGH LOW PRESSURE HETEROGENEOUS OXIDATIVE CARBONYLATION OF AMINES
    Publication number: 20020183541
    Abstract: The process disclosed herein satisfies the need in the art for an industrially viable oxidative carbonylation catalytic system, and is capable of producing carbamates at a significantly higher rate than those processes reported in journal and patent literature. This reaction process takes place via a reaction mechanism that does not involve drastic conditions. Specifically, the catalytic system of the present invention employs Group VIII metal catalysts and/or copper-based catalysts with halide promoters to produce carbamates through heterogeneous oxidative carbonylation at atmospheric pressure and relatively non-drastic temperatures in a gas-solid carbonylation process.
    Type: Application
    Filed: April 26, 2001
    Publication date: December 5, 2002
    Inventors: Steven C. Chuang, Yawu Chi, Bei Chen, Pisanu Toochinda