Preparation of hydrogen fluoride with low levels of arsenic, iro

Chemistry of inorganic compounds – Halogen or compound thereof – Hydrogen halide

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423483, 423484, C01B 722

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active

040326217

ABSTRACT:
A process for preparing pure anhydrous hydrogen fluoride with decreased levels of arsenic, iron and sulfite by treating anhydrous hydrogen fluoride sequentially with an oxidizing agent, and then a heavy metal free reducing agent, distilling the resulting mixture and recovering the pure hydrogen fluoride.

REFERENCES:
patent: 3166379 (1965-01-01), Bradley et al.
patent: 3687622 (1972-08-01), Garris
McPherson & Henderson book "A Course in General Chem.", 1927, 3rd Ed. pp. 89, 90, Ginn & Co., N. Y.
J. H. Simons' book "Fluorine Chem.", vol. 1, 1950, p. 250, The Academic Press Inc., publishers, New York, N. Y.

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