Invention Application
- Patent Title: PROCESS FOR PREPARING CYCLIC CARBONATES WITH AN EXOCYCLIC VINYLIDENE GROUP
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Application No.: US17758683Application Date: 2021-01-05
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Publication No.: US20230094796A1Publication Date: 2023-03-30
- Inventor: Thomas SCHAUB , Peter Rudolf , Ulrike Licht , A. Stephen K. Hashmi , Saumya Dabral , Chloe Johnson
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Priority: EP20152025.1 20200115
- International Application: PCT/EP2021/050039 WO 20210105
- Main IPC: C07D317/40
- 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.
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