Process for purification of dimethyl sulphoxide (DMSO)

Details Process for purification of dimethyl sulphoxide (DMSO) Process for purification of dimethyl sulphoxide (DMSO)

1998-05-14

2000-02-01

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfur containing

210660, 210638, C07C31506

Patent

active

06020530&

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.

REFERENCES:
Alan M. Phipps, "Anion Exchange in Dimethyl Sulfoxide", Analytical Chemistry 40(12):1769-1773 (1968).
Chaudron et al., "La Purification du Dimethylsulfoxyde: criteres de purete", Chimie Analytique 53(5):310-314 (1971) (copy to be provided).
Copy of French Search Report dated Jan. 28, 1998.

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