Patents by Inventor Larissa Ding

Larissa Ding 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 OF PREPARING A TITANIUM-MODIFIED CR/SILICA CATALYST
    Publication number: 20250154295
    Abstract: A method for making high-PV titanium-modified Cr/Silica (Cr/Ti/Silica) catalyst precursor, with PV>1.5 ml/g, comprising: providing a silica support, typically based on a desired porosity, purity, particle size and size distribution; providing a coating solution containing a Cr-containing compound, a Ti-containing compound, and a solvent; mixing the coating solution with the silica support to form a catalyst preparation mixture; and drying the catalyst preparation mixture to produce a Cr/Ti/Silica catalyst precursor. The Cr/Ti/Silica catalyst is surprisingly tolerant to the presence of water in the catalyst preparation mixture, as shown by it containing water in an H2O:Ti molar ratio ranging from 2-50 with negligible effect on the pore volume (PV) and the MI potential of the Cr/Ti/Silica catalyst precursor. A catalyst, such as an olefin polymerization catalyst, made by the method is also disclosed.
    Type: Application
    Filed: January 13, 2023
    Publication date: May 15, 2025
    Inventors: Yatao Rachel HU, Myoung LEE, Chong ZHAO, Larissa DING
  • Composition of, and process for preparing, silica xerogel for beer stabilization
    Patent number: 7538067
    Abstract: A silica xerogel, a process for making it, and a process for using it to reduce chill haze in beer includes incorporation in the xerogel of one or more alkali metals, optionally in combination with one or more alkaline earth metals. The pH of the xerogel is between 8.0 and 10.5, preferably between 8.5 and 10.0.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: May 26, 2009
    Assignee: PQ Corporation
    Inventors: Yatao Hu, Larissa Ding, Robert E. Patterson
  • Composition of, and process for preparing, silica xerogel for beer stabilization
    Publication number: 20070219091
    Abstract: A silica xerogel, a process for making it, and a process for using it to reduce chill haze in beer includes incorporation in the xerogel of one or more alkali metals, optionally in combination with one or more alkaline earth metals. The pH of the xerogel is between 8.0 and 10.5, preferably between 8.5 and 10.0.
    Type: Application
    Filed: May 14, 2007
    Publication date: September 20, 2007
    Applicant: PQ Corporation
    Inventors: Yatao Hu, Larissa Ding, Robert Patterson
  • Composition of, and process for using, silica xerogel for beer stabilization
    Patent number: 7229655
    Abstract: A silica xerogel, a process for making it, and a process for using it to reduce chill haze in beer includes incorporation in the xerogel of one or more alkali metals, optionally in combination with one or more alkaline earth metals. The pH of the xerogel is between 8.0 and 10.5, preferably between 8.5 and 10.0.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: June 12, 2007
    Assignee: PQ Corporation
    Inventors: Yatao Hu, Larissa Ding, Robert E. Patterson
  • Composition of, and process for using, silica xerogel for beer stabilization
    Publication number: 20050142258
    Abstract: A silica xerogel, a process for making it, and a process for using it to reduce chill haze in beer includes incorporation in the xerogel of one or more alkali metals, optionally in combination with one or more alkaline earth metals. The pH of the xerogel is between 8.0 and 10.5, preferably between 8.5 and 10.0.
    Type: Application
    Filed: December 30, 2003
    Publication date: June 30, 2005
    Inventors: Yatao Hu, Larissa Ding, Robert Patterson