Patents by Inventor Yu-Wen Chiu

Yu-Wen Chiu 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).

  • Method for the regeneration of supercritical extractant
    Patent number: 6506304
    Abstract: A method for recovering supercritical extractant, such as supercritical CO2, from a mixture containing the supercritical extractant and a solute is disclosed, which includes contacting the mixture with a molecular sieve membrane at a temperature and a pressure in a critical region of the extractant and near a critical point of the extractant so that a permeate rich in the extractant and a retentate having a enriched concentration of the solute in the extractant are generated. The molecular sieve membrane has a pore size significantly larger than a size of the extractant provided that the pore size is less than and close to sizes of clusters formed of the solute and the extractant at the temperature and the pressure.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: January 14, 2003
    Inventors: Chung-Sung Tan, Yu-Wen Chiu
  • Method for the regeneration of supercritical extractant
    Publication number: 20020139749
    Abstract: A method for recovering supercritical extractant, such as supercritical CO2, from a mixture containing the supercritical extractant and a solute is disclosed, which includes contacting the mixture with a molecular sieve membrane at a temperature and a pressure in a critical region of the extractant and near a critical point of the extractant so that a permeate rich in the extractant and a retentate having a enriched concentration of the solute in the extractant are generated. The molecular sieve membrane has a pore size significantly larger than a size of the extractant provided that the pore size is less than and close to sizes of clusters formed of the solute and the extractant at the temperature and the pressure.
    Type: Application
    Filed: April 3, 2001
    Publication date: October 3, 2002
    Inventors: Chung-Sung Tan, Yu-Wen Chiu