Process for purifying hydrogen fluoride

Details Process for purifying hydrogen fluoride Process for purifying hydrogen fluoride

C - Chemistry, Metallurgy

01

B

23/180

C01B 7/19 (2006.01) C01B 9/08 (2006.01)

Patent

CA 2023589

ABSTRACT OF THE DISCLOSURE A process for preparing hydrogen fluoride involving treating anhydrous hydrogen fluoride con- taining primarily trivalent arsenic impurities with an effective amount of chromium (VI) oxide (i.e., CrO3) and oxygen such as to oxidize substantially all of the trivalent arsenic to pentavalent arsenic (i.e., As+3 ---> As+5) followed by separation and recovery (e.g., by distillation) of purified anhydrous hydrogen fluoride. CH-1679

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