Patents by Inventor Renshui Lan

Renshui Lan 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).

  • V-P-Si composite oxide catalyst precursor used for producing maleic anhydride from butance
    Patent number: 7547655
    Abstract: The present invention provides a catalyst precursor for producing maleic anhydride by oxidizing butane. Said catalyst precursor is prepared by a process comprising partially reducing V+5 to V+4 in a mixture of alcohols consisting of isobutanol and benzyl alcohol in a volume ratio of 2.5-5.0, then adding a phosphoric oxy-acid and an alkylsilicon in turn. The catalyst precursor prepared according to said process has a small pore volume, a relatively high bulk density in an appropriate pore size distribution.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 16, 2009
    Assignee: New Tianjin T. & D. Co., Ltd.
    Inventor: Renshui Lan
  • V-p-ci composite oxide catalyst precursor used for producing maleic anhydride from butance
    Publication number: 20060241310
    Abstract: The present invention provides a catalyst precursor for producing maleic anhydride by oxidizing butane. Said catalyst precursor is prepared by a process comprising partially reducing V+5 to V+4 in a mixture of alcohols consisting of isobutanol and benzyl alcohol in a volume ratio of 2.5-5.0, then adding a phosphoric oxy-acid and an alkylsilicon in turn. The catalyst precursor prepared according to said process has a small pore volume, a relatively high bulk density in an appropriate pore size distribution.
    Type: Application
    Filed: January 30, 2004
    Publication date: October 26, 2006
    Inventor: Renshui Lan