Title:
METHOD FOR RECOVERING PLATINUM GROUP ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/188708
Kind Code:
A1
Abstract:
Provided is a method for recovering a platinum group element from a water-soluble polymer on which a platinum group element is adsorbed, wherein the method is provided with a preparation step for preparing a hydrochloric acid aqueous solution containing 0.25-31.50 wt% of hydrochloric acid, and a mixing step for mixing the hydrochloric acid aqueous solution prepared in the preparation step and a water-soluble polymer on which the platinum group element is adsorbed for 1.5 hours or longer in the presence of thiourea, mixing being performed with the content ratio of the thiourea in the mixture in the mixing step being 0.5-20.0 wt% and the content ratio of the water-soluble polymer on which the metal group element is adsorbed being 16-72 wt%.
Inventors:
FURUKAWA KAZUNORI (JP)
NAKAI AKITO (JP)
KAWAKITA HIDETAKA (JP)
OYAMADA JUZO (JP)
NAKAI AKITO (JP)
KAWAKITA HIDETAKA (JP)
OYAMADA JUZO (JP)
Application Number:
PCT/JP2019/011856
Publication Date:
October 03, 2019
Filing Date:
March 20, 2019
Export Citation:
Assignee:
ZEON CORP (JP)
UNIV SAGA (JP)
UNIV SAGA (JP)
International Classes:
C08K3/08; C22B11/00; C08L101/14; C22B3/24
Domestic Patent References:
| WO2011132740A1 | 2011-10-27 |
Foreign References:
| JP2014055331A | 2014-03-27 |
Other References:
KAJIWARA, TAKAFUMI ET AL.: "Recovery of Palladium in Highly-Viscous Polymer Solution Using Precipitation of Water-Soluble Polymer", PROCEEDINGS OF ISEC2017, 2017, pages 119 - 124, XP055638864
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (JP)
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