Method for continuously producing cyclic carbonate
US9586927B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 18, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Jul 18, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a method for continuously producing a cyclic carbonate, by which generation of a glycol in a reaction for synthesizing a cyclic carbonate is suppressed, and a cyclic carbonate having a high purity can be efficiently obtained even by simple purification.A method for continuously producing a cyclic carbonate, including filling a catalyst in a fixed-bed tube reactor, and continuously feeding carbon dioxide and an epoxide to the fixed-bed tube reactor to thereby bringing the carbon dioxide and the epoxide into contact with the catalyst, while continuously withdrawing the reaction liquid in the fixed-bed tube reactor, wherein the method includes a pre-treatment step in which a pre-treatment liquid containing a cyclic carbonate is brought into contact with the catalyst before feeding the carbon dioxide and the epoxide to the fixed-bed tube reactor, and the generated glycol is removed out of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.