Chemistry of inorganic compounds – Halogen or compound thereof – Hydrogen halide
Patent
1975-11-24
1977-06-28
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Hydrogen halide
423483, 423484, C01B 722
Patent
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.
E. I. Du Pont de Nemours and Company
Stern Edward
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