EP 3458437 A1 20190327 - METHOD FOR PRODUCING TETRAFLUOROPROPENE
Title (en)
METHOD FOR PRODUCING TETRAFLUOROPROPENE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON TETRAFLUORPROPEN
Title (fr)
PROCEDE DE FABRICATION DE TETRAFLUOROPROPENE
Publication
Application
Priority
- FR 1654445 A 20160519
- FR 2017051187 W 20170517
Abstract (en)
[origin: WO2017198947A1] 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.
IPC 8 full level
C07C 17/20 (2006.01); C07C 21/18 (2006.01)
CPC (source: EP US)
B01J 8/0457 (2013.01 - EP US); B01J 8/0492 (2013.01 - EP US); B01J 19/02 (2013.01 - US); B01J 38/12 (2013.01 - US); C07C 17/206 (2013.01 - EP US); C07C 21/18 (2013.01 - US); B01J 2208/00371 (2013.01 - US); B01J 2219/0286 (2013.01 - US); B01J 2219/0295 (2013.01 - US)
Citation (search report)
See references of WO 2017198947A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017198947 A1 20171123; CN 109311788 A 20190205; EP 3458437 A1 20190327; FR 3051469 A1 20171124; FR 3051469 B1 20180511; US 10640438 B2 20200505; US 2019210943 A1 20190711; US 2020223774 A1 20200716
DOCDB simple family (application)
FR 2017051187 W 20170517; CN 201780037646 A 20170517; EP 17731203 A 20170517; FR 1654445 A 20160519; US 201716099208 A 20170517; US 202016836977 A 20200401