Invention Application
- Patent Title: METHOD FOR PREPARING 2,3,3,3-TETRAFLUORO-1-PROPENE AND RECYCLING 2-CHLORO-3,3,3-TRIFLUOROPROPENE FREE OF IMPURITIES
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Application No.: US16063734Application Date: 2016-12-14
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Publication No.: US20200157029A1Publication Date: 2020-05-21
- Inventor: Abdelatif BABA-AHMED , Bertrand COLLIER , Dominique DEUR-BERT , Laurent WENDLINGER
- Applicant: ARKEMA FRANCE
- Applicant Address: FR Colombes
- Assignee: Arkema France
- Current Assignee: Arkema France
- Current Assignee Address: FR Colombes
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@370979f
- International Application: PCT/EP2016/080944 WO 20161214
- Main IPC: C07C21/18
- IPC: C07C21/18 ; C07C17/383

Abstract:
The invention concerns a method for purifying 2-chloro-3,3,3-trifluoropropene (1233xf) from a first composition comprising 2-chloro-3,3,3-trifluoropropene and at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), said method comprising the steps of bringing said first composition into contact with at least one organic extractant in order to form a second composition; extractive distillation of said second composition in order to form a third composition comprising at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,1,1,3,3,3-hexafluoropropane (236fa), and said organic extractant; and a stream comprising 2-chloro-3,3,3-trifluoropropene.
Public/Granted literature
- US10899689B2 Method for purifying 2-chloro-3,3,3-trifluoropropene and method for preparing 2,3,3,3-tetrafluoro-1-propene Public/Granted day:2021-01-26
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