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

Patent metadata

Field	Value
Publication number	US-10414704-B2
Application number	US-201615014583-A
Country	US
Kind code	B2
Filing date	Feb 3, 2016
Priority date	Oct 22, 2010
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

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.

First claim

The invention claimed is:

1. A catalytic fluorination process for producing 2-chloro-3,3,3-trifluoropropene comprising:
activating a fluorination catalyst with a fluorine-containing compound, wherein the fluorination catalyst is a chromium catalyst further comprising a zinc co-catalyst, said zinc co-catalyst being present in an amount from about 1-10 wt % of said fluorination catalyst, and
reacting 1,1,1,2,3-pentachloropropane and/or 1,1,2,2,3-pentachloropropane in a gas phase in the presence of HF, oxygen, and the activated fluorination catalyst and the absence of a polymerization stabilizer, wherein the fluorination reaction takes place at a reaction pressure and activating the fluorination catalyst takes place at a pressure above the reaction pressure.

2. The process according to claim 1 , wherein the ratio of oxygen with respect to 1,1,1,2,3-pentachloropropane and/or 1,1,2,2,3-pentachloropropane is 0.05 to 15 mole %.

3. The process according to claim 1 , wherein said catalyst is supported on a support selected from the group consisting of fluorinated alumina, fluorinated chromia, fluorinated activated carbon and graphite carbon.

4. The process according to claim 1 , wherein the 1,1,1,2,3-pentachloropropane contains up to 40 mol % of isomer 1,1,2,2,3-pentachloropropane.

5. The process according to claim 1 , wherein the process is carried out at a temperature of from 200 to 450° C.

6. The process according to claim 1 , wherein the process is carried out with a contact time from 6 to 100 sec.

7. The process according to claim 1 , wherein the process is carried out with a molar ratio HF:240 from 3:1 to 150:1.

8. The process according to claim 1 wherein the process is continuous.

Assignees

• Arkema France

Inventors

• Bonnet Philippe
• Pigamo Anne
• Wendlinger Laurent
• Doucet Nicolas

Classifications

• C07C17/42

  Use of additives, e.g. for stabilisation · CPC title

• C07C17/206

  the other compound being HX · CPC title

• B01J23/866

  Nickel and chromium · CPC title

• C07C17/25 Primary

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

• C07C21/18

  containing fluorine · CPC title