Verfahren zur Reinigung von 1,2-Difluorethylen (hfo-1132)

Details

Veröffentlichungs-Nr.

EP4752126

Anmeldetag

7. April 2020

Veröffentlichung

3. Juni 2026

Rechtsraum

EP

IPC

C07C17/389

Abstract

This invention provides a method for purifying HFO-1132 to a high purity while suppressing the isomerization and loss of HFO-1132. Specifically, the present invention provides a method for purifying 1,2-difluoroethylene, which is HFO-1132, the method comprising, in this order,step 1 of bringing a composition comprising trans-1,2-difluoroethylene, which is HFO-1132(E), and water into contact with a zeolite having an average pore size of 2 to 4 Å to reduce the water content from the composition; andstep 2 of recovering a purified product containing HFO-1132(E) and a reduced content of water, and containing less than 0.1% by volume of HFO-1132(2).

Anmelder

Firma

Daikin Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete