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:
Dec. 02, 2025
Filed:
Jan. 05, 2021
Basf SE, Ludwigshafen am Rhein, DE;
Thomas Schaub, Ludwigshafen, DE;
Peter Rudolf, Ludwigshafen, DE;
Ulrike Licht, Ludwigshafen, DE;
A. Stephen K. Hashmi, Heidelberg, DE;
Saumya Dabral, SN Heerenveen, NL;
Chloe Johnson, Heidelberg, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
A process can be used for preparing cyclic carbonates with an exocyclic vinylidene group by reacting a propargylic alcohol with COin the presence of a silver catalyst having at least one bulky ligand a lipophilic carboxylate ligand. After completion of the reaction, the catalyst is separated from the cyclic carbonate by the use of two organic solvents of different polarity and having a miscibility gap. The silver catalyst is enriched in the less polar solvent and the cyclic carbonate in the more polar solvent.