Invention Grant
- Patent Title: Method for producing and purifying 2,3,3,3-tetrafluoropropene
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Application No.: US16521031Application Date: 2019-07-24
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Publication No.: US10730813B2Publication Date: 2020-08-04
- Inventor: Bertrand Collier , Dominique Deur-Bert , Joaquin Lacambra , Laurent Wendlinger
- Applicant: Arkema France
- Applicant Address: FR Colombes
- Assignee: ARKEMA FRANCE
- Current Assignee: ARKEMA FRANCE
- Current Assignee Address: FR Colombes
- Agency: NK Patent Law
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@61237e7b
- Main IPC: C07C17/25
- IPC: C07C17/25 ; C07C17/20 ; C07C21/18 ; C07C17/38 ; C07C17/383 ; C07C19/08

Abstract:
The invention relates to a process for producing 2,3,3,3-tetrafluoropropene performed using a starting composition, comprising the steps of placing the starting composition in contact with HF, in the presence of a catalyst, to produce a composition A comprising 2,3,3,3-tetrafluoropropene (1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (1233xf), 1,1,1,2,2-pentafluoropropane (245cb), and side products C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (1234zeE) and 1,1,1,3,3-pentafluoropropane (245fa); recovery of said composition A and purification thereof to form and recover a first stream comprising 2,3,3,3-tetrafluoropropene (1234yf) and one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb); recycling into step a) of said one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,1,2,2-pentafluoropropane (245cb).
Information query