Title:
ACTIVATED CARBON FOR NOBLE METAL ADSORPTION, NOBLE METAL ADSORPTION FILTER, AND METHOD FOR RECOVERING NOBLE METALS
Document Type and Number:
WIPO Patent Application WO/2013/191269
Kind Code:
A1
Abstract:
An activated carbon for adsorbing a noble metal from an aqueous solution containing a noble metal, wherein the difference (absolute value) between the zeta-potential in a 10-mmol/L aqueous solution of sodium tetraborate, and the zeta-potential in a 0.01-mmol/L aqueous solution of sodium tetraborate is adjusted to 18 mV or less, and the pore volume at a pore radius of 1 nm or less is adjusted to 150 to 500 mm3/g. This activated carbon may have a sugar solution decolorization performance of 30% or higher. The aqueous solution containing a noble metal may be a plating waste liquid. The present invention allows noble metal to be adsorbed (or recovered) with good efficiency from a noble metal-containing liquid.
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Inventors:
HANAMOTO TETSUYA (JP)
YAMADA TAKAYUKI (JP)
SABAE YOSHICHIKA (JP)
YAMADA TAKAYUKI (JP)
SABAE YOSHICHIKA (JP)
Application Number:
PCT/JP2013/067033
Publication Date:
December 27, 2013
Filing Date:
June 21, 2013
Export Citation:
Assignee:
KURARAY CHEMICAL KK (JP)
TANAKA PRECIOUS METAL IND (JP)
TANAKA PRECIOUS METAL IND (JP)
International Classes:
C22B11/00; B01J20/10; B01J20/28; C01B31/12; C01B32/336; C02F1/28; C22B3/24; C22B7/00
Foreign References:
| JPH08281099A | 1996-10-29 | |||
| JPH0834605A | 1996-02-06 | |||
| JP2002274828A | 2002-09-25 | |||
| JPH10121156A | 1998-05-12 | |||
| JP2009024200A | 2009-02-05 | |||
| JP2001303148A | 2001-10-31 | |||
| JP3516811B2 | 2004-04-05 |
Other References:
See also references of EP 2865769A4
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
Atsuo Kuwata (JP)
Atsuo Kuwata (JP)
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