Purification of tungsten hexafluoride

Details Purification of tungsten hexafluoride Purification of tungsten hexafluoride

1990-03-30

1994-06-28

Lewis, Michael L.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary fluorine containing compound

62 85, 62119, C01G 4104

Patent

active

053244982

ABSTRACT:
A process is provided for purifying liquid tungsten hexafluoride containing volatile and non-volatile impurities. The process comprises the steps of evaporating tungsten hexafluoride from non-volatile impurities dissolved in liquid tungsten hexafluoride and condensing the evaporated tungsten hexafluoride. The condensed tungsten hexafluoride is subjected to freezing to solidify the tungsten hexafluoride. Volatile impurities are then evacuated from the solid tungsten hexafluoride. Thereafter, the solid tungsten hexafluoride is thawed to liquid tungsten hexafluoride to release trapped volatile impurities and then heated to a temperature above the boiling point of tungsten hexafluoride under pressure in a closed container. The volatile impurities dissolved in the thawed tungsten hexafluoride are removed and collected above the thawed tungsten hexafluoride and vented into an evacuated space.

REFERENCES:
patent: 3992159 (1976-11-01), Mitchell
patent: 3995011 (1976-11-01), Jache et al.
patent: 4339350 (1982-07-01), Pellegrini, Jr. et al.

Affiliated with

Also associated with

Rating

Purification of tungsten hexafluoride 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 of tungsten hexafluoride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of tungsten hexafluoride will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2376254