Chemistry of inorganic compounds – Halogen or compound thereof – Hydrogen halide
Patent
1989-10-31
1990-10-02
Doll, John
Chemistry of inorganic compounds
Halogen or compound thereof
Hydrogen halide
203 34, 4235611, C01B 719
Patent
active
049605801
ABSTRACT:
A process for preparing hydrogen fluoride that involves treating anhydrous hydrogen fluoride containing primarily trivalent arsenic impurities with a sulfur compound capable of providing sulfide ions (e.g., H.sub.2 S) so as to precipitate the arsenic (i.e., as As.sub.2 S.sub.3) followed by separation and recovery (e.g., by distillation or filtration) of purified anhydrous hydrogen fluoride.
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Bolam Brian M.
Doll John
E. I. Du Pont de Nemours and Company
Stevenson Robert B.
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