Process for fine purification of sulphur hexafluoride from impur

Chemistry of inorganic compounds – Halogen or compound thereof – Sulfur containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

62 12, 62 18, 23294R, 23295R, C01B 1745

Patent

active

043805329

ABSTRACT:
The present invention relates to the production of high-purity substances and, more specifically, to a process for a fine purification of sulphur hexafluoride from impurities.
The process for a fine purification of sulphur hexafluoride comprises purification of sulphur hexafluoride by crystallization at a speed of displacement of the interphase boundary of from 1 to 50 mm/hr at a temperature of from 222.3 to 217.degree. K.; the liquid-phase concentrate formed during crystallization is subjected to sublimation purification under a pressure of from 210 to 1.3-0.13 KPa.
The high-purity sulphur hexafluoride is useful in the high-voltage energetics as an insulation and arc-exctinguishing medium, as well as in electronics, laser engineering, metallurgy and medicine.

REFERENCES:
patent: 2717235 (1955-09-01), Prober
patent: 2904476 (1959-09-01), Man
patent: 3210952 (1965-10-01), Strom
patent: 3345277 (1967-10-01), Ashley et al.
patent: 3361532 (1968-01-01), Massonne
patent: 3393977 (1968-07-01), Langer
patent: 3675392 (1972-07-01), Reighter
patent: 3992159 (1976-11-01), Mitchell
patent: 4039646 (1977-08-01), Massonne
patent: 4274851 (1981-06-01), Stokes
Pfann, Zone Melting, John Wiley & Sons, NY, (1958), pp. 1-4, 20-27, 109-111.
Lykhmus, "The Cryogenic Growth of Crystals for Spectroscopic Studies", Sov. Phys. Crystallog., vol. 20, No. 5, (1976), pp. 668-670.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for fine purification of sulphur hexafluoride from impur does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for fine purification of sulphur hexafluoride from impur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for fine purification of sulphur hexafluoride from impur will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-837000

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.