Process for purification of dimethyl sulphoxide (DMSO)
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United States of America Patent
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Feb 1, 2000
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N/A
app pub date -
May 14, 1998
filing date -
May 15, 1997
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Expired
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Abstract
To purify a dimethyl sulfoxide (DMSO), this DMSO is placed in contact with an ion exchange resin of sulfonic type in --SO.sub.3 NH.sub.4 form, and the DMSO is then separated from the resin. The DMSO thus obtained has an iron cation content lower than 1 ppb and a sodium cation content lower than 2 ppb.
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