Patent ID: 6077819
Filing Date: 2000-06-20
Classification: C11D

Abstract:
A composition consisting essentially of hydrogen fluoride in combination with an effective amount of CCl.sub.3 CF.sub.3 to form an azeotrope or azeotrope-like composition with hydrogen fluoride, said composition containing from about 10 to 27 mole percent CCl.sub.3 CF.sub.3 and from about 90 to 73 mole percent of HF; said composition (i) including a liquid phase and a vapor phase with a composition which is essentially that of said liquid phase, and (ii) having a boiling point which ranges from about 20.degree. C. at 140 kPa when the composition consists essentially of about 90 mole percent HF and about 10 mole percent CCl.sub.3 CF.sub.3 to about 150.degree. C. at 4750 kPa when the composition consists essentially of about 73 mole percent HF and about 27 mole percent CCl.sub.3 CF.sub.3.