Patents by Inventor David Keith Welch

David Keith Welch 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
    Publication number: 20220185757
    Abstract: A process for the hydroformylation of olefins to aldehydes is disclosed. The process comprises: hydroformylating one or more olefins with hydrogen and carbon monoxide in the presence of a ligand-rhodium catalyst in a reaction zone; recovering a reactor effluent from the reaction zone, the reactor effluent comprising product aldehyde and the ligand-rhodium catalyst; passing the reactor effluent and a strip gas to a vaporiser, wherein the strip gas comprises carbon monoxide and is formed from a recycle strip gas stream and a make-up strip gas stream, wherein the product aldehyde is vaporised into the strip gas in the vaporiser resulting in a vapour mixture, comprising the strip gas and the product aldehyde, and a liquid mixture, comprising the ligand-rhodium catalyst; recovering the liquid mixture and recycling the ligand-rhodium catalyst to the reaction zone; recovering the vapour mixture and separating the product aldehyde from the vapour mixture.
    Type: Application
    Filed: May 29, 2020
    Publication date: June 16, 2022
    Inventors: Fraser Robert ARCHIBALD, Robert Arthur JOLLY, Maria del Amo LOPEZ, David Keith WELCH
  • Hydroformylation process
    Patent number: 9868686
    Abstract: The present invention relates generally to hydroformylation processes.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: January 16, 2018
    Assignee: Dow Technology Investments LLC
    Inventors: Glenn A. Miller, Victoria L. Biedenstein, Atul Manilal Shah, Martin Lucas Smidt, David Keith Welch
  • HYDROFORMYLATION PROCESS
    Publication number: 20170253549
    Abstract: The present invention relates generally to hydroformylation processes.
    Type: Application
    Filed: February 28, 2017
    Publication date: September 7, 2017
    Inventors: Glenn A. Miller, Victoria L. Biedenstein, Atul Manilal Shah, Martin Lucas Smidt, David Keith Welch