Purification of anhydrous hydrogen fluoride

Details Purification of anhydrous hydrogen fluoride Purification of anhydrous hydrogen fluoride

1977-04-18

1978-04-11

Stern, Edward

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423483, 423484, C01B 722

Patent

active

040839419

ABSTRACT:
A process for preparing very high purity anhydrous hydrogen fluoride by contacting anhydrous hydrogen fluoride with at least 2.3% by weight of persulfuric acid based on the anhydrous hydrogen fluoride or at least 0.7% by weight of hydrogen peroxide based on the anhydrous hydrogen fluoride at ambient temperature and either at least 0.6% by weight of methanol based on the anhydrous hydrogen fluoride or at least one mole of sulfuric acid per mole of hydrogen peroxide at a temperature of from 0.degree. to 75.degree. C and distilling the resulting mixture to recover very high purity anhydrous hydrogen fluoride.

REFERENCES:
patent: 3166379 (1965-01-01), Bradley et al.
patent: 3689370 (1972-09-01), Osaka et al.

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