Claims
- 1.) A process for producing HFC-227ea, comprising:
a.) reacting HFP and HF in the vapor phase in a reaction zone in the presence of HFC-227ea and a fluorination catalyst to form a reaction mixture, b.) feeding said reaction mixture to a distillation column to form a distillation column overhead stream comprising HF and HFC-227ea, and a distillation column bottom stream comprising HFC-227ea substantially free of HF, c.) recycling at least a portion of said distillation column overhead stream to said reaction zone, and d.) recovering said distillation column bottom stream comprising HFC-227ea substantially free of HF.
- 2.) The process of claim 1 wherein said HFP, HF and HFC-227ea are added to said reaction zone in a mole ratio from about 2:1 to about 3:1 HF:HFP and a mole ratio of about 5:1 HFC-227ea:HFP.
- 3.) The process of claim 1 wherein the temperature of said reaction zone is from about 200° C. to about 250° C.
- 4.) The process of claim 1 wherein said fluorination catalyst comprises chromium oxide prepared by pyrolysis of ammonium dichromate.
- 5.) The process of claim 1 wherein said distillation column overhead stream comprises an azeotropic or azeotrope-like composition consisting essentially of HF and HFC-227ea.
- 6.) HFC-227ea produced using the process of claim 1.
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority benefit of U.S. Provisional Application 60/339,923, filed Oct. 31, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60339923 |
Oct 2001 |
US |