Title:
LOW-COST REDUCING AGENT FOR SELECTIVE PRECIPITATION OF NOBLE METAL IONS
Document Type and Number:
WIPO Patent Application WO/2023/097923
Kind Code:
A1
Abstract:
A low-cost reducing agent for selective precipitation of noble metal ions, relating to the technical field of waste resource recycling. According to the present invention, noble metal (gold, platinum, and palladium) ions in a solution containing noble metal (gold, platinum, and palladium) are selectively reduced and precipitated by means of a simple, effective, and low-cost reducing agent, such that noble metal (gold, platinum and palladium) elementary substances are obtained. The basic principle of oxidation-reduction reaction is used, on the basis of the characteristic that the oxidation-reduction potential of noble metal (gold, platinum, and palladium) is higher than that of common metal, an organic reducing agent is used for selectively reducing the noble metal (gold, platinum, and palladium) ions in waste liquid into elementary substances, and then the elementary substances are separated out by means of filtration, such that recycling is achieved, the method is simple, and the process procedure for recycling noble metal (gold, platinum, and palladium) is shortened. The used reducing agent is convenient and easy to obtain and low in price, such that application costs are reduced, and large-scale production is easy to realize.
Inventors:
YU JIAMEI (CN)
GUO JIAQI (CN)
GUO JIAQI (CN)
Application Number:
PCT/CN2022/080535
Publication Date:
June 08, 2023
Filing Date:
March 14, 2022
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
C22B11/00; C22B3/44
Foreign References:
| CN114134336A | 2022-03-04 | |||
| CN105385854A | 2016-03-09 | |||
| CN105779766A | 2016-07-20 | |||
| CN113549762A | 2021-10-26 | |||
| CN103397186A | 2013-11-20 | |||
| CN104263936A | 2015-01-07 | |||
| CN103421956A | 2013-12-04 | |||
| JP2013227608A | 2013-11-07 | |||
| JPH10121156A | 1998-05-12 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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