Claims
- 1. A method of separating 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate from a crude reaction mixture obtained from the preparation of 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate comprising adding an effective amount of fluorotrichloromethane to said mixture and subjecting the resulting composition to fractional distillation to produce an azeotrope consisting of said 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate and said fluorotrichloromethane which is distilled from said mixture.
- 2. A method according to claim 1 wherein said azeotrope is subjected to basic hydrolysis to convert said 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate to 1,1,1,3,3,3-hexafluoroisopropanol and a salt of trifluoroacetic acid.
- 3. A method according to claim 2 wherein said mixture containing said 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate is a product of an electrochemical fluorination process.
- 4. A method according to claim 3 wherein said basic hydrolysis is carried out utilizing KOH in water to give hexafluoroisopropanol and potassium trifluoroacetate.
- 5. A method according to claim 1 wherein said mixture containing said 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate is a product of an electrochemical fluorination process.
- 6. A method according to claim 5 wherein the 1,1,1,3,3,3-hexafluoroisopropyl trifluoroacetate from said azeotropic composition is hydrolyzed utilizing KOH in water to give hexafluoroisopropanol and potassium trifluoroacetate.
CROSS REFERENCE TO RELATED APPLICATION
This is a division of copending application Ser. No. 596,032 filed July 14, 1975 now U.S. Pat. No. 3,990,989.
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3288850 |
Nychka et al. |
Nov 1966 |
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3445507 |
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May 1969 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
596032 |
Jul 1975 |
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