NEW PROCESS FOR SYNTHESIS OF 2,3,3,3-TETRAFLUOROPROPENE (1234YF) AND 2,3-DICHLORO-1,1,1-TRIFLUOROPROPANE (243DB)

Title:

NEW PROCESS FOR SYNTHESIS OF 2,3,3,3-TETRAFLUOROPROPENE (1234YF) AND 2,3-DICHLORO-1,1,1-TRIFLUOROPROPANE (243DB)

Document Type and Number:

WIPO Patent Application WO/2021/093029

Kind Code:

A1

Abstract:

A novel process of manufacturing the compound 2,3,3,3-tetrafluoropropene (1234yf) is provided. The compound 1234yf is the newest refrigerant with zero OPD (Ozone Depleting Potential) and zero GWP (Global Warming Potential). Thus, a process involving a carbene genereation route, for the manufacture of the compound 2,3,3,3-tetrafluoropropene (1234yf), of the compound 243db (2,3-dichloro-1,1,1-trifluoropropane), and optionally of the compound 2-chloro-1,1,1-trifluoropropene (1233xf) via carbene route and compound 243db (2,3-dichloro-1,1,1-trifluoropropane) is provided. A process for the manufacture of the compound 2,3,3,3-tetrafluoropropene (1234yf), wherein the compound 243db (2,3-dichloro-1,1,1-trifluoropropane) serves as a starting material, for the manufacture of the compound 2,3,3,3-tetrafluoropropene (1234yf) is shown. Further, a process for the manufacture of the compound 2,3,3,3-tetrafluoropropene (1234yf), and of the compound 243db (2,3-dichloro-1,1,1-trifluoropropane), wherein the initial starting materials are selected from the group consisting of compound 123 (2,2-dichloro-1,1,1-trifluoroethane), compound 124 (2-chloro-1,1,1,2-tetrafluoroethane), and compound 125 (pentafluoroethane) is provided. The compound 123 (2, 2-dichloro-1,1,1-trifluoroethane) is preferred as the initial starting material. In particular, the process involves a carbene generation step, and wherein the carbene formed is further reacted towards the targeted compounds, especially towards the compound 243db (2,3-dichloro-1,1,1-trifluoropropane), and finally towards the compound 2,3,3,3-tetrafluoropropene (1234yf).

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Inventors:

CUI WEILONG (CN)
ZHOU CHANGYUE (CN)
WANG YONG (CN)

Application Number:

PCT/CN2019/121443

Publication Date:

May 20, 2021

Filing Date:

November 28, 2019

Export Citation:

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Assignee:

FUJIAN YONGJING TECH CO LTD (CN)

International Classes:

C07C17/07; C07C17/25; C07C19/10; C07C21/18

Domestic Patent References:

WO2007056127A1

2007-05-18

Foreign References:

CN109438170A	2019-03-08
CN109438170A	2019-03-08
CN107667085A	2018-02-06
CN102056876A	2011-05-11
CN109843428A	2019-06-04
CN103073386A	2013-05-01
CN107614468A	2018-01-19

Attorney, Agent or Firm:

FUZHOU GEMHOPE PATENT AGENCY (CN)

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