Patents by Inventor Shuwu Yang

Shuwu Yang 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).

  • Publication number: 20080108854
    Abstract: The present invention provides a process for the preparation of a fluoroiodoalkane compound represented by the formula CF3(CF2)n—I, wherein n is 0 or 1. The process includes the step of contacting: (i) a compound represented by the formula CF3(CF2)n—Y, wherein Y is selected from H, Cl, Br, and COOH and n is 0 or 1; (ii) a source of iodine; (iii) an alkali or alkaline earth metal salt catalyst supported on a carrier; and (iv) a catalyst promoter for the alkali or alkaline earth metal salt catalyst. The catalyst promoter includes at least one element selected from a transition metal element, a rare earth metal element, a main group element other than the alkali or alkaline earth metal element, any salts thereof, and any combinations thereof. The contacting is carried out at a temperature and pressure and for a length of time sufficient to produce the fluoroiodoalkane compound. The contacting may be carried out in the presence or absence of a solvent and in the presence or absence of oxygen.
    Type: Application
    Filed: September 18, 2007
    Publication date: May 8, 2008
    Inventors: Shuwu Yang, Hsueh Sung Tung