Invention Grant
- Patent Title: Process for the preparation of 3,3,3-trifluoropropene
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Application No.: US17245459Application Date: 2021-04-30
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Publication No.: US11767277B2Publication Date: 2023-09-26
- Inventor: Emma Jayne Hodgson , Clare Mary Skae , Gary Lloyd , Claire Elizabeth McGuinness , Clive Robert Giddis , James Henry Murray
- Applicant: Mexichem Fluor S.A. de C.V.
- Applicant Address: MX San Luis Potosi
- Assignee: Mexichem Fluor S.A. de C.V.
- Current Assignee: Mexichem Fluor S.A. de C.V.
- Current Assignee Address: MX San Luis Potos
- Agency: Crowell & Moring LLP
- Priority: GB 12598 2015.07.17
- The original application number of the division: US15745460
- Main IPC: C07C17/25
- IPC: C07C17/25 ; C07C17/35 ; C07C17/07 ; C09K5/04
Abstract:
The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising:
(a) fluorinating CCl3CH2CH2Cl (250fb) to produce a reaction product comprising CF3CH2CH2Cl (253fb) in the liquid phase in a first reactor, using HF as the fluorinating agent; and
(b) (i) dehydrohalogenating 253fb to produce 1243zf in the vapour phase in the present of a catalyst in a second reactor; or
(b)(ii) dehydrohalogenating 253fb to produce 1243zf in a second reactor, wherein the reaction product comprising 253fb produced in step (a) has subjected to one or more purification steps before step (b).
The present invention also provides an azeotropic or near-azeotropic composition comprising HF and 253fb.
(a) fluorinating CCl3CH2CH2Cl (250fb) to produce a reaction product comprising CF3CH2CH2Cl (253fb) in the liquid phase in a first reactor, using HF as the fluorinating agent; and
(b) (i) dehydrohalogenating 253fb to produce 1243zf in the vapour phase in the present of a catalyst in a second reactor; or
(b)(ii) dehydrohalogenating 253fb to produce 1243zf in a second reactor, wherein the reaction product comprising 253fb produced in step (a) has subjected to one or more purification steps before step (b).
The present invention also provides an azeotropic or near-azeotropic composition comprising HF and 253fb.
Public/Granted literature
- US20220033330A1 PROCESS FOR THE PREPARATION OF 3,3,3-TRIFLUOROPROPENE Public/Granted day:2022-02-03
Information query
