Title:
PROCESS FOR FRESHWATER PRODUCTION
Document Type and Number:
WIPO Patent Application WO/2007/055019
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a process for freshwater production wherein mainly sodium chloride
can be efficiently removed at low cost from seawater containing various nutrient
salts with good balance to thereby produce freshwater finding application in
agricultural culture fluids, liquid fertilizers and/or agricultural water, etc.
[MEANS FOR SOLVING PROBLEMS] There is provided a process comprising treating seawater
with a thermally treated hydrotalcite-like compound available at low cost,
excelling in stability and having a high chloride ion exchange capacity; subsequently
neutralizing the resultant alkali solution; and thereafter treating the neutralized
solution with zeolite to remove sodium ions to thereby realize production of
agricultural culture fluids, liquid fertilizers and/or agricultural water
at low cost. In this process, a large volume of seawater can be efficiently desalted
once without the need of any special apparatus.
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| JP5754157 | Ion exchange device |
| WO/2009/131635 | SULFATE REMOVAL FROM WATER SOURCES |
Inventors:
IKEGAMI YASUYUKI (JP)
SHIMIZU TOMOE (JP)
WAZIMA TAKAAKI (JP)
SHIMIZU TOMOE (JP)
WAZIMA TAKAAKI (JP)
Application Number:
PCT/JP2005/020753
Publication Date:
May 18, 2007
Filing Date:
November 11, 2005
Export Citation:
Assignee:
UNIV SAGA (JP)
IKEGAMI YASUYUKI (JP)
SHIMIZU TOMOE (JP)
WAZIMA TAKAAKI (JP)
IKEGAMI YASUYUKI (JP)
SHIMIZU TOMOE (JP)
WAZIMA TAKAAKI (JP)
International Classes:
C02F1/42; A01C21/00; A01G25/00; A01G31/00; B01J41/10; C02F1/28; C05G5/23
Foreign References:
| JPH11209191A | 1999-08-03 | |||
| JPS4869780A | 1973-09-21 | |||
| JPS58214338A | 1983-12-13 | |||
| JPS4889559A | 1973-11-22 | |||
| JP2005255441A | 2005-09-22 |
Attorney, Agent or Firm:
HIRAI, Yasuo (Hakataekimae 2-Chome Hakata-K, Fukuoka-Shi Fukuoka 11, JP)
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