Method for purifying dimethyl sulphoxide (DMSO)
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United States of America Patent
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Nov 23, 1999
Grant Date -
N/A
app pub date -
May 12, 1998
filing date -
Nov 17, 1995
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Abstract
This process consists in placing liquid DMSO with a low water content in contact with an ion exchange resin in --SO.sub.3 H form, and then in separating the liquid from the resin. The DMSO thus obtained has a content of iron cation tracer element of less than or equal to 1 ppb and a content of Na cation tracer element of less than or equal to 2 ppb.
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