Login| Sign Up| Help| Contact|

Patent Searching and Data


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.

Inventors:
HANAMOTO Tetsuya (4342, Tsurumi, Bizen-sh, Okayama 25, 〒7050025, JP)
YAMADA Takayuki (4342, Tsurumi, Bizen-sh, Okayama 25, 〒7050025, JP)
SABAE Yoshichika (Shonan Plant 2-14, Nagatoro, Hiratsuka-sh, Kanagawa 21, 〒2540021, JP)
Application Number:
JP2013/067033
Publication Date:
December 27, 2013
Filing Date:
June 21, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KURARAY CHEMICAL CO., LTD. (4342, Tsurumi Bizen-sh, Okayama 25, 〒7050025, JP)
TANAKA KIKINZOKU KOGYO K.K. (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 22, 〒1006422, JP)
International Classes:
C22B11/00; B01J20/10; B01J20/28; C01B31/10; C01B31/12; C02F1/28; C22B3/24; C22B7/00
Foreign References:
JPH08281099A1996-10-29
JPH0834605A1996-02-06
JP2002274828A2002-09-25
JPH10121156A1998-05-12
JP2009024200A2009-02-05
JP2001303148A2001-10-31
JP3516811B22004-04-05
Other References:
See also references of EP 2865769A4
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (KUWATA & CO, 6th Floor Minato Umeda Building, 3-17, Nishitemma 6-chome, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
Download PDF: