Patents by Inventor Ann M. Lauritzen

Ann M. Lauritzen 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).

  • Process for starting-up an ethylene oxide reactor
    Patent number: 4874879
    Abstract: This invention relates to a process for starting up a fixed bed ethylene oxide reactor containing a catalyst comprising silver, alkali metal promoter and rhenium co-promoters supported on an alumina carrier which process comprises heating the reactor to slightly below normal operating conditions, passing an ethylene containing gas over the catalyst at a flow rate of about 20% of design, adding a chlorohydrocarbon moderator to the gas passing over the catalyst and after approximately 1 cubic centimeters of moderator (basis liquid) per cubic foot of catalyst has been added, then adding oxygen to the gas passing over the catalyst to initiate the ethylene oxidation reaction and subsequently raising the reactor temperature and gas flow rates to operating conditions.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: October 17, 1989
    Assignee: Shell Oil Company
    Inventors: Ann M. Lauritzen, David S. Baker, Margot H. Christiansen, Beamon M. Johnson, John G. Schuren
  • Ethylene oxide process
    Patent number: 4833261
    Abstract: This invention relates to a process for the production of ethylene oxide by contacting ethylene with an oxygen-containing gas in the presence of a catalyst comprising silver, a promoter of an alkali metal and a promoter of rhenium supported on a porous refractory support.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: May 23, 1989
    Assignee: Shell Oil Company
    Inventor: Ann M. Lauritzen
  • Ethylene oxide catalyst & process for preparing the catalyst
    Patent number: 4820675
    Abstract: This invention relates to an ethylene oxide catalyst having an improved selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promoter selected from sulfur, molbydenum, tungsten, chromium and mixtures thereof supported on a porous refractory support.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: April 11, 1989
    Assignee: Shell Oil Company
    Inventor: Ann M. Lauritzen
  • Ethylene oxide process
    Patent number: 4808738
    Abstract: This invention relates to an ethylene oxide catalyst having an improved selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promoter selected from sulfur, molbydenum, tungsten, chromium and mixtures thereof supported on a porous refractory support.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: February 28, 1989
    Assignee: Shell Oil Company
    Inventor: Ann M. Lauritzen
  • Ethylene oxide catalyst and process for preparing the catalyst
    Patent number: 4766105
    Abstract: This invention relates to an ethylene oxide catalyst having an improved selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promotor selected from sulfur, molbydenum, tungsten, chromium and mixtures thereof supported on a porous refractory support.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: August 23, 1988
    Assignee: Shell Oil Company
    Inventor: Ann M. Lauritzen
  • Ethylene oxide catalyst and process for preparing the catalyst
    Patent number: 4761394
    Abstract: This invention relates to an ethylene oxide catalyst having an improved selectivity which catalyst comprises silver, a promoting amount of alkali metal and a promoting amount of rhenium supported on a porous refractory support.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: August 2, 1988
    Assignee: Shell Oil Company
    Inventor: Ann M. Lauritzen