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Title:
ALKALI METAL SEPARATION AND RECOVERY METHOD AND ALKALI METAL SEPARATION AND RECOVERY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2012/077610
Kind Code:
A1
Abstract:
The invention relates to an alkali metal separation and recovery method that comprises separation of an alkali metal-containing permeate from raw water containing alkali metals using a nanofiltration membrane and recovery of the alkali metal contained in the permeate using an after-treatment. The method is characterized in that the nanofiltration membrane unit is configured in at least two stages and the concentrated water from the preceding nanofiltration membrane unit is used as the water supplied to the latter nanofiltration membrane unit.

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Inventors:
TANIGUCHI MASAHIDE
TAKABATAKE HIROO
SASAKI TAKAO
Application Number:
PCT/JP2011/077975
Publication Date:
June 14, 2012
Filing Date:
December 02, 2011
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
TANIGUCHI MASAHIDE
TAKABATAKE HIROO
SASAKI TAKAO
International Classes:
B01D61/58; B01D61/02; B01D61/36; B01D71/56; C02F1/04; C02F1/44; C22B9/02; C22B26/12
Foreign References:
JP2008100219A2008-05-01
JP2003200161A2003-07-15
JP2003326259A2003-11-18
JP2002079246A2002-03-19
JP2007253050A2007-10-04
Attorney, Agent or Firm:
OGURI Shohei et al. (JP)
Shohei Oguri (JP)
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