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Title:
MAGNETIC CHEMICAL ABSORBER, PROCESS FOR PRODUCING THE SAME, METHOD OF REGENERATING THE SAME, AND METHOD OF TREATING WASTE LIQUID
Document Type and Number:
WIPO Patent Application WO/2008/023853
Kind Code:
A1
Abstract:
A magnetic chemical absorber which comprises a composite constituted of a core substance comprising fine magnetite particles and schwertmannite deposited on this core substance and chemically bonded thereto. This magnetic chemical absorber can be produced in a hydrolytic reaction step in which a solution of a ferric salt is heated and a reactive substance is then added thereto to conduct a hydrolytic reaction and thereby precipitate schwertmannite crystals, by adding fine magnetite particles to the solution after the solution has been heated and before the crystal precipitation begins. This magnetic chemical absorber is a novel and excellent one more improved in the ability to absorb harmful ions. A method of treating a waste liquid using this magnetic chemical absorber is effective in reducing burdens from the standpoints of the environment and profitability. This magnetic chemical absorber can be regenerated.

Inventors:
OKIDO MASAZUMI (JP)
BANDO YOSHIYUKI (JP)
ESKANDARPOUR AKBAR (JP)
SASSA KENSUKE (JP)
ASAI SHIGEO (JP)
Application Number:
PCT/JP2007/067094
Publication Date:
February 28, 2008
Filing Date:
August 27, 2007
Export Citation:
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Assignee:
UNIV NAGOYA NAT UNIV CORP (JP)
OKIDO MASAZUMI (JP)
BANDO YOSHIYUKI (JP)
ESKANDARPOUR AKBAR (JP)
SASSA KENSUKE (JP)
ASAI SHIGEO (JP)
International Classes:
B01J20/06; B01J20/34; B03C1/00; C01G49/00; C02F1/28
Domestic Patent References:
WO2004065306A12004-08-05
Foreign References:
JP2003112162A2003-04-15
JP2005087833A2005-04-07
JP2004097159A2004-04-02
JPS5442387A1979-04-04
JP2004256383A2004-09-16
JP2005000871A2005-01-06
JP2005095732A2005-04-14
JP2005000875A2005-01-06
JP2003112162A2003-04-15
JP2003112163A2003-04-15
JP2004283767A2004-10-14
JP2005186047A2005-07-14
JP2004358396A2004-12-24
Other References:
ESKANDARPOUR A. ET AL.: "Creation of Nanomagnetite Aggregated Iron Oxide Hydroxide for Magnetically Removal of Fluoride and Phosphate from Wastewater", ISIJ INTERNATIONAL, vol. 47, no. 4, 15 April 2007 (2007-04-15), pages 558 - 562, XP003020295
Attorney, Agent or Firm:
OHKAWA, Hiroshi (Nakamura-ku Nagoya-sh, Aichi 02, JP)
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