Purification of halide

Details Purification of halide Purification of halide

1984-06-27

1985-12-10

Doll, John

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

55 71, 55 73, 55 75, C01B 707, B01D 5300

Patent

active

045579210

ABSTRACT:
A process for the removal of hydrogen halides including HCl and HF, and/or sulfur dioxide from silicon tetrafluoride. Contaminated gaseous silicon tetrafluoride is passed through a column of zeolite preferably in the hydrogen cation form so as to permit recovery of silicon tetrafluoride containing less than about 10% of the original contamination levels. Acid-stable zeolite materials suitable for the process of the invention are subjected to a flow of hot gases to permit regeneration of the column for use in a semicontinuous process.

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"American Mineralogist," vol. 28, p. 545, 1943, Dec. 1943.
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Adsorption by Dehydrated Zeolite Crystals in Zeolite Molecular Sieves, D. W. Breck, Riley Interscience Publishers, 1974, pp. 607-611, 616, 618-619, and 625-627.

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