Title:
PROCESS FOR PRODUCING COMPOSITE REVERSE OSMOSIS MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2006/038503
Kind Code:
A1
Abstract:
This invention provides a process for producing a composite reverse osmosis membrane in a commercially stable and continuous manner. The composite reverse osmosis membrane produced by this process comprises a polyamide skin layer and a porous support for supporting the polyamide skin layer. The production process is characterized by comprising step A of coating an aqueous solution a containing a compound having two or more reactive amino groups onto a porous support while moving the porous support to form an aqueous solution covering layer, step B of holding the aqueous solution covering layer onto the porous support for 0.2 to 15 sec to penetrate the aqueous solution a into fine pores in the porous support, step C of removing the aqueous solution covering layer while holding the aqueous solution a within the fine pores in the porous support, and step D of, after step C, coating an organic solution b containing a polyfunctional acid halide onto the surface of the porous support and brining the organic solution b into contact with the above aqueous solution a to conduct interfacial polymerization and thus to form a polyamide skin layer, the composite reverse osmosis membrane being continuously produced.
Inventors:
ISHIZUKA HIROTOSHI (JP)
TAKATA MASAKATSU (JP)
NAGURA KATSUMORI (JP)
HIROSE MASAHIKO (JP)
NISHIYAMA SHINYA (JP)
MATSUO HIROSHI (JP)
TAKATA MASAKATSU (JP)
NAGURA KATSUMORI (JP)
HIROSE MASAHIKO (JP)
NISHIYAMA SHINYA (JP)
MATSUO HIROSHI (JP)
Application Number:
PCT/JP2005/017829
Publication Date:
April 13, 2006
Filing Date:
September 28, 2005
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
ISHIZUKA HIROTOSHI (JP)
TAKATA MASAKATSU (JP)
NAGURA KATSUMORI (JP)
HIROSE MASAHIKO (JP)
NISHIYAMA SHINYA (JP)
MATSUO HIROSHI (JP)
ISHIZUKA HIROTOSHI (JP)
TAKATA MASAKATSU (JP)
NAGURA KATSUMORI (JP)
HIROSE MASAHIKO (JP)
NISHIYAMA SHINYA (JP)
MATSUO HIROSHI (JP)
International Classes:
B01D67/00; B01D61/02; B01D69/12; B01D71/56
Foreign References:
| JP2001179061A | 2001-07-03 | |||
| JP2001038175A | 2001-02-13 | |||
| JPH0278428A | 1990-03-19 | |||
| JP2002355938A | 2002-12-10 | |||
| JP2003275652A | 2003-09-30 | |||
| JP2000300974A | 2000-10-31 |
Other References:
COATING, 2002, pages 405
See also references of EP 1808220A4
See also references of EP 1808220A4
Attorney, Agent or Firm:
Suzuki, Takao (13-9 Nishinakajima 5-chome, Yodogawa-k, Osaka-shi Osaka 11, JP)
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