公开(公告)号：US20230094796A1

公开(公告)日：2023-03-30

申请号：US17758683

申请日：2021-01-05

Applicant: BASF SE

Inventor： Thomas SCHAUB ,  Peter Rudolf ,  Ulrike Licht ,  A. Stephen K. Hashmi ,  Saumya Dabral ,  Chloe Johnson

IPC: C07D317/40 ,  B01J31/04 ,  B01J31/18 ,  B01J31/24

Abstract: A process can be used for preparing cyclic carbonates with an exocyclic vinylidene group by reacting a propargylic alcohol with CO2 in 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.