Title:
NMP PURIFICATION SYSTEM
Document Type and Number:
Japanese Patent JP2014144937
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a system that can purify NMP while suppressing the deterioration during pervaporation separation (PV).SOLUTION: Ion exchange means 16 removes the impurities contained in NMP aqueous solution. Regarding the NMP aqueous solution whose impurities are removed by the ion exchange means 16, pervaporation separation means 18 selectively separates moisture via a separation membrane, to yield dewatered NMP. Meanwhile, the conductivity of the impurity free NMP aqueous solution supplied to the pervaporation means 18 is measured by conductivity measurement means 34a, 34b.
Inventors:
TERASHI RYOSUKE
Application Number:
JP2013015229A
Publication Date:
August 14, 2014
Filing Date:
January 30, 2013
Export Citation:
Assignee:
ORGANO KK
International Classes:
C07D207/267; B01D61/36; B01D71/02; B01J47/04
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Foreign References:
| US6217771B1 | 2001-04-17 |
Other References:
日本化学会編, 実験化学講座（続）６ 無機化合物の構造研究法, JPN6016037618, 10 September 1965 (1965-09-10), pages 30 - 33, ISSN: 0003409922
Attorney, Agent or Firm:
Patent business corporation YKI international patent firm
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