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Title:
METHOD FOR PURIFYING DIMETHYL SULFOXIDE
Document Type and Number:
WIPO Patent Application WO/2014/178309
Kind Code:
A1
Abstract:
　The present invention provides a method for purifying dimethyl sulfoxide economically and at good yield so as to satisfy the specifications of the United States Pharmacopoeia and reduce odor. The method is characterized in that a solution having 35 parts by weight or more of water admixed per 100 parts by weight of raw material dimethyl sulfoxide is distilled.

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Inventors:
ISHINO MICHIKO (JP)
TANAKA KOJI (JP)
ABE HIROMITSU (JP)
INOUE HIDEKI (JP)
Application Number:
PCT/JP2014/061306
Publication Date:
November 06, 2014
Filing Date:
April 22, 2014
Export Citation:
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Assignee:
TORAY FINECHEMICALS CO LTD (JP)
International Classes:
C07C317/04; C07C315/06
Foreign References:
JPS63270659A1988-11-08
JP2006151821A2006-06-15
JP2006096763A2006-04-13
JPH0912534A1997-01-14
JP2009096792A2009-05-07
JPH0329737B21991-04-25
GB1222453A1971-02-17
JPH0312128B21991-02-19
JPH0312128B21991-02-19
US3358036A1967-12-12
Other References:
"ALDRICH Chemistry", 2009, JAPAN, pages 1090 - 1092, XP008181439, Retrieved from the Internet
See also references of EP 2993166A4
Attorney, Agent or Firm:
Seiryu Patent Professional Corporation et al. (JP)
Clear stream international patent business corporation (JP)
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