Process for the continuous recovery of hydrogen fluoride gas
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United States of America Patent
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Jul 16, 1991
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N/A
app pub date -
Jul 7, 1989
filing date -
Feb 27, 1989
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Expired
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Abstract
A continuous process for the recovery of anhydrous hydrogen fluoride gas by contacting an aqueous solution of an alkali metal fluoride in hydrofluoric acid with a sulfur-containing dehydrating stream. The dehydrating stream preferably consists of sulfur trioxide dissolved in sulfuric acid. The desired product is obtained in high yield and purity.
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