Title:
二次資源から貴金属を回収する方法
Document Type and Number:
Japanese Patent JP7185646
Kind Code:
B2
Abstract:
Suggested is a method for recovering precious metals from secondary resources comprising or consisting of the following steps:
(a) providing a source of solid waste material comprising precious metals in an amount of at least 0.0001 % b.w.;
(b) bringing said waste material into contact with heterotrophic micro-organisms capable of producing and releasing hydrocyanic acid;
(c) adding a solvent or an aqueous nutrient solution capable of serving as a nutrient source for said micro-organisms to the mixture;
(d) depleting said waste materials from the precious metals contained therein by complexation of the metals with said hydrocyanic acid released by said micro-organisms;
(e) separating the depleted solid waste material from the liquid containing the metalcyano complexes;
(f) recovering the precious metals from their cyano-complexes in known manner.
Inventors:
Esther Gabor
Yvonne Tiffert
Guido Moiller
Yvonne Tiffert
Guido Moiller
Application Number:
JP2019569898A
Publication Date:
December 07, 2022
Filing Date:
June 07, 2018
Export Citation:
Assignee:
BRAIN AG
International Classes:
C22B11/00; B09B3/00; C22B3/02; C22B3/18; C22B3/24; C22B3/26; C22B7/00; C22B7/02
Domestic Patent References:
| JP2012523247A |
Foreign References:
| CN103320619A | ||||
| CN106011484A |
Other References:
Arda Isildar et. al.,Two-step bioleaching of copper and gold from discarded printed circuit boards (PCB),Waste Management,2016年12月15日,vol. 57,pages 149-157
Attorney, Agent or Firm:
Yamato Kento
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