Process for the preparation of fluoroolefin compounds
US9018429B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2010 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jul 17, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00761
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The subject of the invention is a process for the preparation of fluoroolefin compounds. It relates more particularly to a process for manufacturing a (hydro)fluoroolefin compound comprising (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at least one hydrogen atom, provided that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, into contact with potassium hydroxide in a stirred reactor, containing an aqueous reaction medium, equipped with at least one inlet for the reactants and with at least one outlet, in order to give the (hydro)fluoroolefin compound, which is separated from the reaction medium in gaseous form, and potassium fluoride, (ii) bringing the potassium fluoride formed in (i) into contact, in an aqueous medium, with calcium hydroxide in order to give potassium hydroxide and to precipitate calcium fluoride, (iii) separation of the calcium fluoride precipitated in step (ii) from the reaction medium and (iv) optionally, the reaction medium is recycled after optional adjustment of the potassium hydroxide concentration to step (i).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.