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1. (WO2017198947) METHOD FOR PRODUCING TETRAFLUOROPROPENE

Pub. No.:    WO/2017/198947    International Application No.:    PCT/FR2017/051187
Publication Date: Fri Nov 24 00:59:59 CET 2017 International Filing Date: Thu May 18 01:59:59 CEST 2017
IPC: C07C 17/20
C07C 21/18
Applicants: ARKEMA FRANCE
Inventors: DEUR-BERT, Dominique
GARRAIT, Dominique
PIGAMO, Anne
WENDLINGER, Laurent
Title: METHOD FOR PRODUCING TETRAFLUOROPROPENE
Abstract:
The present invention concerns a method for preparing tetrafluoropropene utilising three reactors and comprising the steps of (a) implementing, in the first and second reactors, at least one step of reacting, in the gas phase, a compound B in the presence of hydrofluoric acid and a catalyst, in alternation with a step of regenerating the catalyst by bringing it into contact with a regeneration flow comprising an oxidising agent, (b) implementing, in the third reactor, a preliminary step of producing the compound B, in alternation with a step of regenerating the preliminary catalyst with a regeneration flow comprising an oxidising agent. The step of regenerating the preliminary catalyst in the third reactor is implemented in the absence of a step of reacting the compound B in the presence of hydrofluoric acid in said first and second reactors. The present invention also concerns a facility configured to implement the present method.