METHOD FOR PRODUCING IRON POWDER FOR PROCESSING ORGANIC HALOGEN COMPOUNDS, AND METHOD FOR PURIFYING CONTAMINATED SOIL OR GROUNDWATER

Title:

METHOD FOR PRODUCING IRON POWDER FOR PROCESSING ORGANIC HALOGEN COMPOUNDS, AND METHOD FOR PURIFYING CONTAMINATED SOIL OR GROUNDWATER

Document Type and Number:

WIPO Patent Application WO/2012/099094

Kind Code:

A1

Abstract:

Provided is an iron powder which has an organic halogen compound processing performance equivalent to or higher than that of conventional organic halogen compound processing materials, without containing a substance such as copper that places burden on the environment. Also provided is a method for producing an iron powder for processing organic halogen compounds, which is characterized by comprising: a step wherein an iron powder is immersed in one or more solvents selected from among water and organic solvents that have lower vapor pressure than water and contain oxygen; a step wherein the iron powder immersed in the solvents is subjected to solid-liquid separation, thereby obtaining iron powder dampened with the solvents; and a step wherein the iron powder dampened with the solvents is dried, while being maintained at a temperature less than 40˚C.

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Inventors:

UEHARA TAISHI (JP)

Application Number:

PCT/JP2012/050795

Publication Date:

July 26, 2012

Filing Date:

January 17, 2012

Export Citation:

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Assignee:

DOWA ECO SYSTEM CO LTD (JP)
UEHARA TAISHI (JP)

International Classes:

A62D3/34; A62D3/37; B09C1/02; B09C1/08; B22F1/00; B22F1/068; B22F1/10; B22F1/16; C02F1/70; C09K3/00; C09K17/02; A62D101/22

Foreign References:

JP2009235204A	2009-10-15
JPH11235577A	1999-08-31
JP2002316050A	2002-10-29
JP2000005740A	2000-01-11
JP2002069425A	2002-03-08
JP2003339902A	2003-12-02

Other References: