EP 3762355 A1 20210113 - PROCESS FOR THE PRODUCTION OF 2,3,3,3-TETRAFLUOROPROPENE
Title (en)
PROCESS FOR THE PRODUCTION OF 2,3,3,3-TETRAFLUOROPROPENE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 2,3,3,3-TETRAFLUORPROPEN
Title (fr)
PROCÉDÉ DE PRODUCTION DU 2,3,3,3-TÉTRAFLUOROPROPÈNE
Publication
Application
Priority
- FR 1851954 A 20180307
- FR 2019050479 W 20190304
Abstract (en)
[origin: WO2019170991A1] The present invention relates to a process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of: i) in a first reactor, contacting a stream A containing 2-chloro -3,3,3-trifluoropropene with hydrofluoric acid in gas phase in the presence of a catalyst, to produce a stream B containing 2,3,3,3-tetrafluoropropene, HF and unreacted 2-chloro -3,3,3-trifluoropropene; and ii) in a second reactor, contacting, in gas phase and optionally in the presence of a catalyst, hydrofluoric acid with a stream containing at least one chlorinated compound selected from the group consisting of 1,1,1,2,3-pentachloropropane, 2,3-dichloro-1,1,1-trifluoropropane, 2,3,3,3-tetrachloropropene and 1,1,2,3-tetrachloropropene to produce a stream C containing 2-chloro-3,3,3-trifluoropropene, characterised in that the stream B obtained in step i) supplies said second reactor used in step ii); and in that the electrical conductivity of said stream A supplied at step i) is lower than 15 mS/cm.
IPC 8 full level
C07C 17/20 (2006.01); C07C 21/18 (2006.01)
CPC (source: EP US)
B01J 23/26 (2013.01 - US); C07C 17/20 (2013.01 - EP US); C07C 17/204 (2013.01 - US); C07C 17/206 (2013.01 - US); C07C 17/25 (2013.01 - US); C07C 21/18 (2013.01 - EP); C07C 21/18 (2013.01 - US)
Citation (search report)
See references of WO 2019170991A1
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 2019170991 A1 20190912; CN 111770908 A 20201013; EP 3762355 A1 20210113; FR 3078700 A1 20190913; FR 3078700 B1 20200710; US 11084768 B2 20210810; US 2021002188 A1 20210107
DOCDB simple family (application)
FR 2019050479 W 20190304; CN 201980015511 A 20190304; EP 19715971 A 20190304; FR 1851954 A 20180307; US 201916976599 A 20190304