Patents by Inventor Tsun-chiu Tsao

Tsun-chiu Tsao 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).

  • Recovery of C.sub.2 hydrocarbons from demethanizer overhead
    Patent number: 4270940
    Abstract: Enhanced recovery of ethane and ethylene from demethanizer overhead is obtained by subjecting the uncondensed vapor effluent from the main reflux condenser to further condensation and accompanying rectification in a dephlegmator and returning the liquid condensate from the dephlegmator to the demethanizer column. One or more of the refrigerants employed in the dephlegmator comprises vapors leaving the dephlegmator and cooled by pressure reduction.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: June 2, 1981
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Howard C. Rowles, Tsun-chiu Tsao