Purification process for hexafluoroethane products

Details Purification process for hexafluoroethane products Purification process for hexafluoroethane products

1997-01-24

1998-03-03

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 1908

Patent

active

057236992

ABSTRACT:
The disclosure relates to removing impurities from hexafluoroethane (CF.sub.3 CF.sub.3), also known as Perfluorocarbon 116 (PFC-116) or Fluorocarbon 116 (FC-116), by using azeotropic distillation such that an overhead product consisting essentially of HCl-hexafluoroethane is formed, optionally combined with a phase separation step to break the HCl-hexafluoroethane azeotropic or azeotrope-like composition thereby permitting recovery of substantially pure hexafluoroethane. Unreacted hydrogen fluoride (HF) may be removed from hexafluoroethane during the above azeotropic distillation with HCl or alternatively by an azeotropic distillation wherein an HF-hexafluoroethane azeotropic or azeotrope-like composition exits overhead and substantially pure HF exits in the bottoms stream.

REFERENCES:
patent: 4950364 (1990-08-01), Wismer
patent: 5258561 (1993-11-01), Nappa et al.
A.J. Waytek, The Role Of Fluorocarbon Gases In The Microelectronics Industry, 1986, 331-334.
Blanchard, Wendlinger and Canesson, Heterogeneous Catalytic Reactions Of Chlorofluorocarbons, 1990, 123-128.
W. Schotte, Collection Of Phase Equilibrium Data For Separation Technology, 1980, 432-439.
Harold R. Null, Phase Equilibrium In Process Design, 1970, 124-126.
Stanley M. Walas, Phase Equilibrium In Chemical Engineering, 1985, 165-244.
The Van Nostrand Chemists Dictionary, 1961, p. 56.

Affiliated with

Also associated with

Rating

Purification process for hexafluoroethane products does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purification process for hexafluoroethane products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification process for hexafluoroethane products will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2249912