Patents by Inventor Corby A. Roberts

Corby A. Roberts 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).

  • Direct synthesis of cyclic carbonates using choline chloride as catalyst under mild conditions
    Patent number: 11897860
    Abstract: A method for direct synthesis of cyclic carbonates is achieved by reacting at least one epoxide with carbon dioxide in the presence of a choline catalyst, such as choline chloride, under mild conditions such as a temperature between about 25° C. to 150° C. and a pressure of from about atmospheric to 75 psi (0.52 MPa), in a cyclic carbonate solvent. The choline catalyst may be the only catalyst used, and a co-catalyst or hydrogen bond donor is not necessary. The concentration of choline catalyst in the solvent ranges from about 0.5 mol % to about 10 mol %, based on the epoxide.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: February 13, 2024
    Assignee: Baker Hughes Oilfield Operations LLC
    Inventors: Analette Carrasco, Jerry J. Weers, Catherine C Blackwell, Sankaran Murugesan, Xiaofeng Wang, Douglas Nugent, Corby A. Roberts
  • DIRECT SYNTHESIS OF CYCLIC CARBONATES USING CHOLINE CHLORIDE AS CATALYST UNDER MILD CONDITIONS
    Publication number: 20230286936
    Abstract: A method for direct synthesis of cyclic carbonates is achieved by reacting at least one epoxide with carbon dioxide in the presence of a choline catalyst, such as choline chloride, under mild conditions such as a temperature between about 25° C. to 150° C. and a pressure of from about atmospheric to 75 psi (0.52 MPa), in a cyclic carbonate solvent. The choline catalyst may be the only catalyst used, and a co-catalyst or hydrogen bond donor is not necessary. The concentration of choline catalyst in the solvent ranges from about 0.5 mol % to about 10 mol %, based on the epoxide.
    Type: Application
    Filed: March 14, 2022
    Publication date: September 14, 2023
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Analette Carrasco, Jerry J. Weers, Catherine C. Blackwell, Sankaran Murugesan, Xiaofeng Wang, Douglas Nugent, Corby A. Roberts