Purification of sulfuryl fluoride
AssigneeSolway Fluor und Derivate GmbH
InventorsJohannes Eicher, Matthias Marek, Lore Hirsch
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Abstract
Sulfuryl fluoride, which is useful as a fumigant, may be contaminated with sulfur dioxide and possibly other impurities such as sulfuryl chloride, depending on the way it is produced. According to the invention, sulfur dioxide and, if applicable, sulfuryl chloride fluoride are removed from a contaminated sulfuryl fluoride product by using aluminum oxide as an adsorbing agent. The method of the invention is highly advantageous because it eliminates the need to use activated carbon as an additional adsorbent.
Claims8
A method of purifying sulfuryl fluoride which is contaminated with sulfur dioxide, said method comprising contacting the contaminated sulfuryl fluoride with aluminum oxide as an adsorbent to adsorb sulfur dioxide, and recovering a purified sulfuryl fluoride having a decreased sulfur dioxide content, wherein aluminum oxide is the only adsorbent.
Dependencies are inferred from the claim text.