IP Library Granted Patent US 9,902,671
Granted Patent B2
US 9,902,671 · App. 15/402,327 · Granted Feb 27, 2018

Method for producing 2-chloro-3,3,3,-trifluoropropene (HCFC-1233xf)

Inventors: Daniel C. Merkel (Orchard Park, NY); Hsueh S. Tung (Getzville, NY)
Assignee: HONEYWELL INTERNATIONAL INC.
C07C17/206
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Quick Facts
Patent No.
US 9,902,671
App. No.
15/402,327
Granted
Feb 27, 2018
Kind
B2
Abstract

The present invention relates to an improved method for manufacturing 2-chloro-3,3,3,-trifluoropropene (HCFC-1233xf) by reacting 1,1,2,3-tetrachloropropene, 1,1,1,2,3-pentachloropropane, and/or 2,3,3,3-tetrachloropropene with hydrogen fluoride, in a vapor phase reaction vessel in the presence of a vapor phase fluorination catalyst and stabilizer. HCFC-1233xf is an intermediate in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf) which is a refrigerant with low global warming potential.

Claims (28)

1. A method of preparing fluorinated organic compounds comprising contacting at least one chlorocarbon selected from the group consisting of tetrachloropropene and pentachloropropane with a halogenating agent in the presence of at least one catalyst and at least one stabilizer under conditions effective to produce a C3 haloolefin.

2. The method of claim 1 wherein said C3 haloolefin comprises 2-chloro-3,3,3,-trifluoropropene.

3. The method of claim 2 wherein said chlorocarbon is at least one compound selected from the group consisting of 1,1,2,3-tetrachloropropene, 2,3,3,3-tetrachloropropene, 1,1,1,2,3-pentachloropropane.

4. The method of claim 1 wherein said halogenating agent is a fluorinating agent.

5. The method of claim 4 wherein said fluorinating agent comprises hydrogen fluoride.

6. The method of claim 1 wherein at least a portion of said contacting step is conducted at a temperature of from about 80° C. to about 400° C.

7. The method of claim 1 wherein at least a portion of said contacting step is conducted at a pressure of from about 5 torr to about 150 psig.

8. The method of claim 1 wherein said contacting step comprises conducting at least a portion of said contacting step in the gas phase.

9. The method of claim 1 wherein said catalyst comprises at least one fluorination catalyst.

10. The method of claim 9 where the at least one fluorination catalyst is selected from the group consisting of Cr 2 O 3 , FeCl 3 /C, Cr 2 O 3 , Cr 2 O 3 /Al 2 O 3 , Cr 2 O 3 /AlF 3 , Cr 2 O 3 /carbon, CoCl 2 /Cr 2 O 3 /Al 2 O 3 , NiCl 2 /Cr 2 O 3 /Al 2 O 3 , CoCl 2 /AlF 3 , NiCl 2 /AlF 3 and combinations thereof.

11. The method of claim 9 wherein at least one fluorination catalyst comprises Cr 2 O 3 .

12. The method of claim 1 wherein said stabilizer comprises an amine stabilizer.

13. The method of claim 1 wherein said stabilizer comprises a hydroquinone stabilizer.

14. The method of claim 1 wherein said stabilizer is selected from the group consisting of p-tap(4-tert-Amylphenol), methoxy-hydroquinone, 4-methoxyphenol(HQMME), triethylamine, di-isopropyl amine, butylated hydroxy anisole (BHA), thymol and combinations thereof.

15. The method of claim 12 wherein said stabilizer comprises triethylamine.

16. The method of claim 12 wherein said stabilizer comprises di-isopropyl amine.

17. The method of claim 13 wherein said stabilizer comprises methoxy-hydroquinone.

18. The method of claim 13 wherein said stabilizer comprises 4-methoxyphenol (HQMME).

19. The method of claim 14 wherein said stabilizer comprises p-tap.

20. The method of claim 1 wherein the concentration of said stabilizer is less than about 300 ppm.

21. The method of claim 20 wherein the concentration of said stabilizer is less than about 100 ppm.

22. The method of claim 21 wherein the concentration of said stabilizer is about 10 ppm or less.

23. The method of claim 1 wherein said catalyst in the presence of said stabilizer is substantially operable for a greater period of time than said catalyst wherein said stabilizer is not present.

24. The method of claim 23 wherein said catalyst in the presence of said stabilizer is substantially operable at least about 40% longer than said catalyst wherein said stabilizer is not present.

25. The method of claim 23 wherein said catalyst in the presence of said stabilizer is substantially operable at least about 50% longer than said catalyst wherein said stabilizer is not present.

26. The method of claim 3 wherein said chlorocarbon comprises 1,1,2,3-tetrachloropropene.

27. The method of claim 3 wherein said chlorocarbon comprises 2,3,3,3-tetrachloropropene.

28. The method of claim 3 wherein said chlorocarbon comprises 1,1,1,2,3-pentachloropropane.

Assignments (2)
SECURITY INTEREST Recorded Jan 12, 2026
From: SOLSTICE ADVANCED MATERIALS US, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 074569/0260 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 27, 2025
From: MERKEL, DANIEL C.; TUNG, HSUEH S.
To: HONEYWELL INTERNATIONAL INC.
Reel/Frame 070354/0427 →
Continuity (7)
Continuation 14986750 · Jan 4, 2016
Continuation 14570283 · Dec 15, 2014
Continuation 13742792 · Jan 16, 2013
Continuation 12880951 · Sep 13, 2010
Continuation 12179055 · Jul 24, 2008
Provisional Application 60951796 · Jul 25, 2007
Related Publication 20170233314A1 · Aug 17, 2017