Title:
ION-EXCHANGE MEMBRANE AND METHOD OF REMOVING METAL IMPURITY FROM ORGANIC LIQUID WITH FILTER ELEMENT PROVIDED WITH THE MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2007/136048
Kind Code:
A1
Abstract:
[PROBLEMS] To provide: an ion-exchange membrane for metal ion removal which is
effective in removing metal impurities from an organic liquid or a liquid mixture of
an organic liquid and water; and a method of removing metal impurities from an
organic liquid or a liquid mixture of an organic liquid and water with the ion-exchange membrane.
[MEANS FOR SOLVING PROBLEMS] The ion-exchange membrane has an average pore
diameter of 5-50 µm, a membrane thickness of 250-5,000 µm, an ion-exchange
capacity of 2.0-4.0 meq/g, and a pure-water flow resistance of 50-300 kPa sec
cm2/mL. The method comprises using a filter element equipped with
the ion-exchange membrane to filter an organic liquid or a liquid mixture of an
organic liquid and water. Thus, metal impurities contained in these liquids
are removed therefrom.
Inventors:
HASHIMOTO YUKIO (JP)
Application Number:
PCT/JP2007/060406
Publication Date:
November 29, 2007
Filing Date:
May 22, 2007
Export Citation:
Assignee:
ENTEGRIS INC (US)
HASHIMOTO YUKIO (JP)
HASHIMOTO YUKIO (JP)
International Classes:
B01J47/12; B01J39/18; C08J5/22
Foreign References:
| JP2002355564A | 2002-12-10 | |||
| US5531899A | 1996-07-02 | |||
| JP2004050056A | 2004-02-19 | |||
| JPH11335473A | 1999-12-07 | |||
| JPH02233193A | 1990-09-14 |
Attorney, Agent or Firm:
KAWAGUCHI, Yoshio et al. (Jochi Kioizaka Bldg.7-1 Kioi-cho,Chiyoda-k, Tokyo 94, JP)
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