Patent · US Active

Azeotrope compositions comprising 2,3,3,3-tetrafluoropropene and hydrogen fluoride and uses thereof

US7476771B2 · kind B2 · utility

11Cited by

9References

20Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Ralph Newton Miller · Newark, US
Mario Joseph Nappa · Newark, US
Velliyur Nott Mallikarjuna Rao · Wilmington, US
Allen Capron Sievert · Elkwood Estates, US

Key dates

Filing date	Oct 31, 2006
Grant date	Jan 13, 2009
Priority date	—
Expiry date	Oct 31, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C17/386
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Disclosed herein are azeotrope or near-azeotrope compositions comprising 2,3,3,3-tetrafluoropropene (HFC-1234yf) and hydrogen fluoride (HF). These compositions are useful in processes to produce and purify HFC-1234yf. Additionally, disclosed herein are processes for the manufacture of HFC-1234yf.

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