Method for producing fluorinated compounds

Patent metadata

Field	Value
Publication number	US-9938210-B2
Application number	US-201415028798-A
Country	US
Kind code	B2
Filing date	Oct 13, 2014
Priority date	Oct 17, 2013
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

The invention relates to a method for producing a fluorinated compound, comprising: the provision of a gaseous flow comprising hydrofluoric acid; the provision of at least one liquid flow of a chlorinated compound and the vaporization thereof by mixing with said gaseous flow, the resulting mixture being a gaseous mixture; and the catalytic reaction of the chlorinated compound with hydrofluoric acid in a gaseous phase and the collection of a product flow. The invention also relates to a facility for carrying out said method.

First claim

The invention claimed is:

1. A process for producing a fluoro compound, comprising:
supplying a gas stream comprising hydrofluoric acid;
supplying at least one liquid stream of chloro compound and vaporizing said chloro compound by mixing with said gas stream, the resulting mixture being a gaseous mixture; and
catalytically reacting the chloro compound with the hydrofluoric acid in the gas phase and collecting a product stream,
wherein the mixing of the liquid stream of chloro compound with the gas stream comprising hydrofluoric acid is performed in a static mixer.

2. The process as claimed in claim 1 , wherein:
the chloro compound comprises a chlorocarbon, a chlorohydrocarbon, a chlorofluorocarbon, a hydrochlorofluorocarbon, a chloroolefin, a hydrochloroolefin, a chlorofluoroolefin or a hydrochlorofluoroolefin; and wherein the fluoro compound comprises a fluorocarbon, a fluorohydrocarbon, a chlorofluorocarbon, a hydrochlorofluorocarbon, a fluoroolefin, a hydrofluoroolefin, a chlorofluoroolefin or a hydrochlorofluoroolefin.

3. The process as claimed in claim 1 , comprising one or more steps for separation of the product stream, making it possible to collect, on the one hand, a stream of the fluoro compound and, on the other hand, a recycling stream.

4. The process as claimed in claim 3 , wherein the recycling stream provides the gas stream comprising hydrofluoric acid, optionally after supplying hydrofluoric acid.

5. The process as claimed in claim 3 , comprising a step of catalytic fluorination of the recycling stream with a supply of hydrofluoric acid, the gas stream comprising hydrofluoric acid being collected on conclusion of this fluorination step.

6. The process as claimed in claim 1 , comprising a step of heating the liquid stream of chloro compound to a temperature below its vaporization temperature.

7. The process as claimed in claim 1 , comprising, after the step of mixing the liquid stream of chloro compound with the gas stream comprising hydrofluoric acid, and before the step of catalytic reaction of the chloro compound with the hydrofluoric acid:
a step of heating the mixture; or
a step of cooling the mixture.

Assignees

• Arkema France

Inventors

• Bonnet Philippe
• Collier Bertrand
• Deur-Bert Dominique
• Garrait Dominique
• Pigamo Anne
• Wendlinger Laurent

Classifications

• C07C17/206 Primary

  the other compound being HX · CPC title

• C07C17/21

  with simultaneous increase of the number of halogen atoms · CPC title

• B01J7/00

  Apparatus for generating gases (production of inert gas mixtures B01J19/14; for generating specific gases, see the relevant subclasses, e.g. C01B, C10J {; in "air bags" on vehicles B60R21/26; for starter gas F02C7/26; blasting cartridges for producing gas under pressure F42B3/04}) · CPC title

• C07C17/25

  by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title

• C07C19/08

  containing fluorine · CPC title