Process for purifying hydrogen fluoride

Details Process for purifying hydrogen fluoride Process for purifying hydrogen fluoride

1989-10-31

1991-02-05

Russel, Jeffrey E.

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

203 34, 423491, B01D 300, C01B 719, C01G 2800

Patent

active

049903209

ABSTRACT:
A process for preparing hydrogen fluoride that involves treating anhydrous hydrogen fluoride containing primarily trivalent arsenic impurities with an iodine compound capable of providing iodide ions (e.g., HI) so as to precipitate the arsenic (i.e., as AsI.sub.3) following by separation and recovery (e.g., by distillation or filtration) or purified anhydrous hydrogen fluoride.

REFERENCES:
patent: 3166379 (1965-01-01), Bradley et al.
patent: 4032621 (1977-06-01), Meadows
patent: 4756899 (1988-07-01), Jenczewski et al.
Jander, Spardau & Addison, "Chemistry in Monagueous Ionizing Solvents", Pergamon Press, NY, vol. II, part 2, pp. 209-212.
Bailar, J. C.; Moeller, T.; Kleinberg, J.; Guss, C. O.; Castellion, M. E.; Metz, C.; Chemistry, Academic Press, N.Y., 1978, p. 558.

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