Patents by Inventor Steve R. ALEXANDER

Steve R. ALEXANDER 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).

  • METHODS AND SYSTEMS OF MONITORING FLAMMABILITY OF VARIOUS STREAMS DURING VINYL ACETATE PRODUCTION
    Publication number: 20230312453
    Abstract: Methods and systems for producing vinyl acetate may use flammability limit (FL) formulas with improved efficiencies at more than one location in the vinyl acetate production process. Herein, FLs can be used at one or more of four portions of the vinyl acetate production process: the reactor, the process-to-process heat exchangers, the carbon dioxide removal system, and the ethylene recovery system. Such FLs are functions of operating conditions and include at least one interaction term that represents the interrelation of two or more of the operating conditions (e.g., temperature, pressure, and component concentration) on the FL.
    Type: Application
    Filed: June 7, 2023
    Publication date: October 5, 2023
    Applicant: Celanese International Corporation
    Inventors: Steve R. ALEXANDER, Kevin Clair HANKS, Stacey SOMERVILLE, David S. C. LEE, Christopher Paul DEVLIN
  • Methods and systems of monitoring flammability of various streams during vinyl acetate production
    Patent number: 11731929
    Abstract: Methods and systems for producing vinyl acetate may use flammability limit (FL) formulas with improved efficiencies at more than one location in the vinyl acetate production process. Herein, FLs can be used at one or more of four portions of the vinyl acetate production process: the reactor, the process-to-process heat exchangers, the carbon dioxide removal system, and the ethylene recovery system. Such FLs are functions of operating conditions and include at least one interaction term that represents the interrelation of two or more of the operating conditions (e.g., temperature, pressure, and component concentration) on the FL.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: August 22, 2023
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Steve R. Alexander, Kevin Clair Hanks, Stacey Somerville, David S. C. Lee, Christopher Paul Devlin
  • METHODS OF PRODUCING CATALYSTS FOR VINYL ACETATE PRODUCTION
    Publication number: 20230173466
    Abstract: Methods of producing gold-palladium catalysts suitable for use in the production of vinyl acetate may include drying the catalyst after the incorporation of a promoter at higher temperatures (e.g., 160° C. or greater) to restructure the metals and/or alloys on the catalyst. The restructured catalyst advantageously has increased catalytic activity and improved stability.
    Type: Application
    Filed: June 8, 2021
    Publication date: June 8, 2023
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Steve R. ALEXANDER, Justin DODSON, Laiyuan CHEN
  • METHODS AND SYSTEMS OF MONITORING FLAMMABILITY OF VARIOUS STREAMS DURING VINYL ACETATE PRODUCTION
    Publication number: 20220402852
    Abstract: Methods and systems for producing vinyl acetate may use flammability limit (FL) formulas with improved efficiencies at more than one location in the vinyl acetate production process. Herein, FLs can be used at one or more of four portions of the vinyl acetate production process: the reactor, the process-to-process heat exchangers, the carbon dioxide removal system, and the ethylene recovery system. Such FLs are functions of operating conditions and include at least one interaction term that represents the interrelation of two or more of the operating conditions (e.g., temperature, pressure, and component concentration) on the FL.
    Type: Application
    Filed: December 4, 2020
    Publication date: December 22, 2022
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Steve R. ALEXANDER, Kevin Clair HANKS, Stacey SOMERVILLE, David S.C. LEE, Christopher Paul DEVLIN