Patent ID: 8658846

Claim:
A process for separating a mixture comprising HF and HFC-1234yf, said process comprising: a. feeding the mixture comprising HF and HFC-1234yf to a first distillation column; b. removing an azeotrope composition comprising HF and HFC-1234yf as a first distillate and either i) HF or ii) HFC-1234yf as a first column bottoms composition; c. decanting the first distillate to form 2 liquid phases, being i) an HF-rich phase and ii) an HFC-1234yf-rich phase; and d. recycling a first liquid phase enriched in the same compound that is removed as the first column bottoms, said first liquid phase being either i) HF-rich phase or ii) HFC-1234yf-rich phase, back to the first distillation column; wherein the first distillation column is operated at a pressure of from about 14.7 psia (101 kPa) to about 300 psia (2068 kPa), with a top temperature of from about −50° C. to about 200° C. and a bottom temperature from about −30° C. to about 220° C.