Purification of sulfuryl fluroide by selective adsorption
AssigneeThe Dow Chemical Company
InventorsGeorge S. Fujioka, Brian G. Tobey, David D. Friese
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Abstract
Many impurities of sulfuryl fluroide are removed by selective adsorption on activated alumina and activated carbon. Thionyl fluoride, hydrogen fluoride, hydrogen chloride, and water are removed by treating contaminated sulfuryl fluoride with activated alumina. Sulfur dioxide and 1,2-dichloroethane are removed by treating contaminated sulfuryl fluoride with activated carbon. When sulfuryl fluoride is treated with the two adsorbents in sequence, sulfuryl fluoride of exceptionally high purity is obtained.
Claims30
A process for purifying contaminated sulfuryl fluoride which comprises contacting the contaminated sulfuryl fluoride with at least one adsorbent selected from activated alumina and activated carbon, at a temperature of from about 0.degree. C. to about 100.degree. C. under conditions suitable for the selective adsorption of at least one impurity selected from hydrogen fluoride, hydrogen chloride, sulfur dioxide, and thionyl fluoride, and, thereafter, recovering the purified sulfuryl fluoride.
A process for purifying contaminated sulfuryl fluoride which comprises contacting the contaminated sulfuryl fluoride with both activated alumina and activated carbon absorbents, under conditions suitable for the selective adsorption of at least one impurity, and, thereafter, recovering the purified sulfuryl fluoride.
A process for purifying contaminated sulfuryl fluoride which comprises contacting the contaminated sulfuryl fluoride with an activated alumina adsorbent, under conditions suitable for the selective adsorption of at least one impurity, and, thereafter, recovering the purified sulfuryl fluoride.
Dependencies are inferred from the claim text.