Processes to produce 1,1-difluoropropene (hfo-1252zc), compositions and intermediates thereof

EP4747219A2Pending Publication Date: 2026-05-27THE CHEMOURS CO FC LLC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
THE CHEMOURS CO FC LLC
Filing Date
2024-07-09
Publication Date
2026-05-27

AI Technical Summary

Technical Problem

There is a need for efficient processes to produce 1,1-difluoropropene (HFO-1252zc), a potential new refrigerant that meets evolving regulatory standards for low ozone depletion potential (ODP) and global warming potential (GWP), while also providing superior heat transfer and refrigerant characteristics.

Method used

The process involves converting 1,1,1,3-tetrachloropropane (HCC-250fb) into HFO-1252zc through intermediates such as 1,3-dichloro-1,1-difluoropropane (HCFC-252fc) and 3-chloro-3,3-difluoro-1-propene (HCFO-1242zf) using hydrogen fluoride and hydrogen in the presence or absence of catalysts, followed by dehydrohalogenation.

Benefits of technology

This process effectively produces HFO-1252zc, addressing the need for refrigerants with low ODP and GWP, and providing superior performance in various applications while meeting evolving regulatory standards.

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Abstract

Provided herein are processes for producing difluoroolefins, particularly difluoropropenes such as 1,1-difluoropropene, as well as intermediates, compositions and uses thereof.
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