Patent · US Active

Process for the manufacture of hydrofluoroolefins

US8642818B2 · kind B2 · utility

0Cited by

7References

15Claims

0Family size

Assignee

Arkema Inc. · US

Inventors

Maher Y. Elsheikh · Malvern, US
Philippe Bonnet · Conshohocken, US
John A. Wismer · Washington Crossing, US

Key dates

Filing date	Nov 12, 2009
Grant date	Feb 4, 2014
Priority date	—
Expiry date	May 25, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C21/18
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for manufacturing 1,1,1,2-tetrafluoropropene (1234yf, CF3—CF═CH2) from 1,1,3,3-tetrachlororopropene (1230za, CCl2═CH—CHCl2) and/or 1,1,1,3,3-pentachloropropane (240fa, CCl3CH2CHCl2). The process comprises an isomerization step of 1-chloro-3,3,3 trifluoropropene (1233zd, CF3—CH═CHCl) to 2-chloro-3,3,3 trifluoropropene (1233xf or CF3—CCl═CH2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.