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Title:
NMP AQUEOUS SOLUTION PURIFICATION SYSTEM AND PURIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/207431
Kind Code:
A1
Abstract:
In this NMP aqueous solution purification system 1, the generation of peroxides of NMP is suppressed. This NMP aqueous solution purification system 1 is provided with: a pervaporation membrane device 201 for removing water from an NMP aqueous solution to prepare an NMP concentrated solution; containers 101, 103, 106, 301 which is provided on the upstream side or the downstream side of the pervaporation membrane device 201 and stores the NMP aqueous solution or the NMP concentrated solution; and inert gas supply means L401-405, U402-U405 for filling gas phase parts of the containers 101, 103, 106, 301 with inert gas.

Inventors:
TERASHI RYOSUKE (JP)
YAMADA KYOSUKE (JP)
HIBI AKIRA (JP)
Application Number:
PCT/JP2018/006954
Publication Date:
November 15, 2018
Filing Date:
February 26, 2018
Export Citation:
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Assignee:
ORGANO CORP (JP)
International Classes:
B01D61/36; B01D19/00; B01D53/22; B01D61/00; B01D61/14; B01D61/58; B01D71/02; C01B39/14; C01B39/24; C01B39/26; C01B39/30
Foreign References:
JP2016030233A2016-03-07
JP2003081885A2003-03-19
JPH04298221A1992-10-22
JP2015071139A2015-04-16
JP2013018747A2013-01-31
US20170043302A12017-02-16
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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