METHOD FOR SEPARATING HEAVY METAL FROM GLASS

Title:

METHOD FOR SEPARATING HEAVY METAL FROM GLASS

Document Type and Number:

WIPO Patent Application WO/2013/118695

Kind Code:

A1

Abstract:

Provided is a method for separating a heavy metal from a glass with high efficiency and at low cost. The present invention provides a method for separating a heavy metal from a glass containing a heavy metal oxide and a silica, comprising: a reduction/phase separation step of melting the glass together with a reducing agent and a phase separation accelerator to reduce the heavy metal oxide and, at the same time, produce a silica phase and a glass phase comprising a second phase having higher solubility in an acid solution than that of the silica phase; a heavy metal collection step of separating a heavy metal produced by the above-mentioned reduction from the glass phase and collecting the heavy metal; and an acid extraction step of bringing the glass phase into contact with an acid solution to dissolve the second phase together with a remaining portion of the heavy metal in the acid solution.

Inventors:

MONGI HIDEYUKI (JP)
NARUOKA TOMOHIRO (JP)
IGURA TAKESHI (JP)

Application Number:

PCT/JP2013/052538

Publication Date:

August 15, 2013

Filing Date:

February 05, 2013

Export Citation:

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Assignee:

TOTTORI PREFECTURE (JP)

International Classes:

B09B3/00; C02F1/58; C02F1/62; C02F1/64; C03C15/00; C22B3/04; C22B5/10; C22B7/00; C22B9/10; C22B13/00; C22B13/02; C03C3/102

Domestic Patent References:

WO2003024879A1

2003-03-27

Foreign References:

JPH0796264A	1995-04-11
JP2011235230A	2011-11-24
JP2006511718A	2006-04-06
JPH11156180A	1999-06-15
JP2008200563A	2008-09-04
JPH0796264A	1995-04-11

Other References: