Patents by Inventor Randall Clayton Yeates

Randall Clayton Yeates 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).

  • Silver-containing catalysts, the manufacture of such silver-containing catalysts, and the use thereof
    Publication number: 20040260103
    Abstract: A high activity and high selectivity silver catalyst comprising silver and, optionally, one or more promoters supported on a suitable support material having the form of a shaped agglomerate. The structure of the shaped agglomerate is that of a hollow cylinder having a relatively small inside (bore) diameter. The catalyst is made by providing the shaped material of a particular geometry and incorporating the catalytic components therein. The catalyst is useful in the epoxidation of ethylene.
    Type: Application
    Filed: April 1, 2004
    Publication date: December 23, 2004
    Inventors: Marek Matusz, Michael Alan Richard, John Robert Lockemeyer, Alouisius Nicolaas Renee Bos, Dominicus Maria Rekers, Donald Reinalda, Randall Clayton Yeates
  • Catalyst carriers
    Patent number: 6831037
    Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of making such carriers is also described.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: December 14, 2004
    Assignee: Saint-Gobain Norpro Corporation
    Inventors: Thomas Szymanski, Donald J. Remus, John R. Lockemeyer, Randall Clayton Yeates, William H. Gerdes
  • Catalyst carriers
    Publication number: 20040170556
    Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of malting such carriers is also described.
    Type: Application
    Filed: March 8, 2004
    Publication date: September 2, 2004
    Applicant: Saint-Gobain Norpro Corporation
    Inventors: Thomas Szymanski, Donald J. Remus, John R. Lockemeyer, Randall Clayton Yeates, William H. Gerdes
  • Method for improving the selectivity of a catalyst and a process for the epoxidation of an olefin
    Publication number: 20040049061
    Abstract: A method for improving the selectivity of a supported highly selective epoxidation catalyst comprising silver in a quantity of at most 0.
    Type: Application
    Filed: June 26, 2003
    Publication date: March 11, 2004
    Inventors: John Robert Lockemeyer, Randall Clayton Yeates, Donald Reinalda
  • Catalyst and a process using the catalyst
    Publication number: 20030162984
    Abstract: A catalyst which comprises a carrier and silver deposited on the carrier, which carrier has a surface area of at least 1 m2/g, and a pore size distribution such that pores with diameters in the range of from 0.2 to 10 &mgr;m represent at least 70% of the total pore volume and such pores together provide a pore volume of at least 0.
    Type: Application
    Filed: February 25, 2003
    Publication date: August 28, 2003
    Inventors: John Robert Lockemeyer, Randall Clayton Yeates, Thomas Szymanski, Donald James Remus, William Herman Gerdes
  • Catalyst carriers
    Publication number: 20030162655
    Abstract: The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2/g. A method of making such carriers is also described.
    Type: Application
    Filed: February 25, 2002
    Publication date: August 28, 2003
    Inventors: Thomas Szymanski, Donald J. Remus, John R. Lockemeyer, Randall Clayton Yeates, William H. Gerdes