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Patent Searching and Data


Title:
METHOD FOR PURIFYING DIMETHYL SULFOXIDE
Document Type and Number:
WIPO Patent Application WO/2019/026479
Kind Code:
A1
Abstract:
In one or more embodiments, the present invention pertains to a method for purifying dimethyl sulfoxide, the method including a step for adding an alkaline earth metal hydroxide to a material to be distilled that contains dimethyl sulfoxide, water, and a resin to treat the material to be distilled, and then distilling off the dimethyl sulfoxide, and the amount of heat absorbed being greater than the amount of heat generated in the range of 50-400°C in a DSC curve obtained by measuring a filtrate after treatment of the material to be distilled by the alkaline earth metal hydroxide while heating at 10°C/min. Provided thereby is a method for purifying dimethyl sulfoxide in which even heating a distillation residual solution for a long period of time does not lead to rapid heat generation when distilling off dimethyl sulfoxide to recover the same from the material to be distilled that contains dimethyl sulfoxide and a resin.

Inventors:
DEGUCHI Yoshikuni
Application Number:
JP2018/024439
Publication Date:
February 07, 2019
Filing Date:
June 27, 2018
Export Citation:
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Assignee:
KANEKA CORPORATION (3-18, Nakanoshima 2-chome Kita-ku, Osaka-sh, Osaka 88, 〒5308288, JP)
International Classes:
C07C315/06; C07C317/04
Foreign References:
JPS36023323B1
JP2004033940A2004-02-05
JPS463592B1
JPS43012128B1
JPH09278743A1997-10-28
JP2015145359A2015-08-13
JP2000128854A2000-05-09
JP2016222649A2016-12-28
Attorney, Agent or Firm:
IKEUCHI & PARTNERS (26th Floor, OAP TOWER 8-30, Tenmabashi 1-chome, Kita-ku, Osaka-sh, Osaka 26, 〒5306026, JP)
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