Arkema France

Arkema Inc.

Nicolas Doucet

Laurent Wendlinger

Anne Marie Pigamo

Dominique Deur-Bert

Philippe Bonnet

Michel Devic

Geraldine Cavallini

Pierre-Marie Sedat

Karine Avril

Pierre Ricou

Géraldine Cavallini

The present invention provides a process of catalytic fluorination in gas phase of product 1,1,1,2,3-pentachloropropane or/and 1,1,2,2,3-pentachloropropane into product 2-chloro-3,3,3-trifluoropropene in presence of a catalyst and oxygen.

Process for the manufacture of 2-chloro-3,3,3-trifluoropropene by gas phase fluorination of pentachloropropane

X-Ray photoelectron spectroscopy (XPS) is used to assess or predict the catalytic activity of a chromium oxyfluoride catalyst in a reaction wherein a chlorinated compound is converted to a fluorinated compound.

Chromium oxyfluoride catalysts having high fluorination activity

The present invention relates to a fluorination process, comprising:

Catalytic gas phase fluorination

The invention relates to a fluorination process, alternately comprising reaction stages and regeneration stages, wherein the reaction stages comprise reacting a chlorinated compound with hydrogen fluoride in gas phase in the presence of a fluorination catalyst to produce a fluorinated compound, and the regeneration stages comprise contacting the fluorination catalyst with an oxidizing agent-containing gas flow.

The present invention provides a process of catalytic fluorination in gas phase of product 1,1,1,2,3-pentachloropropane or/and 1,1,2,2,3-pentachloropropane into product 2,3,3,3-tetrafluoropropene in presence of a catalyst.

Process for the manufacture of 2,3,3,3-tetrafluoropropene by gas phase fluorination of pentachloropropane

The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene, comprising the following steps: (a) catalytic reaction of 1,1,1,2,3-pentachloropropane and/or 1,1,2,2,3-pentachloropropane with HF into product 2-chloro-3,3,3-trifluoropropene; (b) catalytic reaction of the thus-obtained 2-chloro-3,3,3-trifluoropropene into 2,3,3,3-tetrafluoropropene.

Process for the preparation of 2,3,3,3 tetrafluoropropene

The present invention relates to a method for manufacturing 2,3,3,3-tetrafluoropropene from halopropanes having the formula CXCHCICHX and halopropenes having the formulas CXCCI&#x2550;CHCCIXCCI&#x2550;CHand CX&#x2550;CCICHX, where X is independently a fluorine or chlorine atom. The invention specifically relates to a method including at least one step during which 2-chloro-3,3,3-trifluoro-1-propene, optionally mixed with at least one halopropane having the formula CXCHCICHX and/or at least one halopropene having the formulas CCIXCCI&#x2550;CHand CX&#x2550;CCICHX, where X is independently a fluorine or chlorine atom, reacts with HF in the gaseous phase in the presence of a fluoridation catalyst at a temperature of between 320 and 420&#xb0; C. with a molar ratio of oxygen to 2-chloro-3,3,3-trifluoro-1-propene of more than 1 but no more than 2.5, and a molar ratio of HF to the total amount of organic compounds to be reacted of between 5 and 40.

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Lyons, France

Nicolas Doucet