The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2024
Filed:
Mar. 14, 2022
Baker Hughes Oilfield Operations Llc, Houston, TX (US);
Analette Carrasco, Missouri City, TX (US);
Jerry J. Weers, Richmond, TX (US);
Catherine C Blackwell, Fulshear, TX (US);
Sankaran Murugesan, Katy, TX (US);
Xiaofeng Wang, Katy, TX (US);
Douglas Nugent, La Porte, TX (US);
Corby A. Roberts, League City, TX (US);
Baker Hughes Oilfield Operations LLC, Houston, TX (US);
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.