Title:
HIGH-VALUE PROCESSING METHOD FOR SOLID WASTE CONTAINING ZINC AND IRON
Document Type and Number:
WIPO Patent Application WO/2023/109224
Kind Code:
A1
Abstract:
The present invention discloses a high-value processing method for a solid waste containing zinc and iron, and belongs to the technical field of metal recycling. The method comprises the following steps: washing, filtering, drying, and grinding a solid waste containing zinc and iron to obtain a washed sample; adding the washed sample into a deep eutectic solvent of choline chloride-oxalic acid dihydrate, performing heating and stirring until a clear solution is obtained, and leaving the solution to stand; adding a supernatant of the solution after being left to stand into deionized water, hydrolyzing and filtering the mixture to obtain a filtrate and a residue, and drying and roasting the residue to obtain nano-zinc oxide; and leaving the filtrate to stand, and filtering, drying and roasting the filtrate to obtain nano-ferric oxide. The present invention can efficiently separate zinc oxide and ferric oxide from a solid waste containing zinc and iron, and prepare nano-zinc oxide and nano-ferric oxide without adding a surfactant.
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| WO/2005/113427 | PROCESS FOR PREPARING NANO-SIZED METAL OXIDE PARTICLES |
| WO/2016/160790 | UV-ABSORBING NANOCRYSTAL CONTAINING COMPOSITE |
Inventors:
YAO HAIWEI (CN)
MAO RUI (CN)
WANG FEI (CN)
MAO RUI (CN)
WANG FEI (CN)
Application Number:
PCT/CN2022/119340
Publication Date:
June 22, 2023
Filing Date:
September 16, 2022
Export Citation:
Assignee:
JIANGSU SHAGANG GROUP CO LTD (CN)
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD (CN)
INSTITUTE OF RES OF IRON AND STEEL JIANGSU PROVINCE/SHA STEEL CO LTD CN (CN)
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD (CN)
INSTITUTE OF RES OF IRON AND STEEL JIANGSU PROVINCE/SHA STEEL CO LTD CN (CN)
International Classes:
C01G9/02; B82Y30/00; B82Y40/00; C01G49/06; C22B1/02; C22B3/16; C22B7/02; C22B19/34
Foreign References:
| CN114261985A | 2022-04-01 | |||
| CN110358923A | 2019-10-22 | |||
| CN110357145A | 2019-10-22 | |||
| CN104831060A | 2015-08-12 |
Other References:
"Master's Thesis", 1 April 2017, KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY, CN, article LEI, ZHEN: "Study on Treatment of Zinc Dust with Deep Eutectic Solvents", pages: 1 - 97, XP009546286
XUECHEN CAO, ZHOU DONGJIE, YAO HAIWEI, JU DIANCHUN: "Study on preparation of nanometer iron oxide and its kinetics by CC-OA DES treatment of iron-containing dust", WUJIYAN-GONGYE = INORGANIC CHEMICALS INDUSTRY, TIANJIN HUAGONG YANJIUSUO, CN, vol. 53, no. 11, 10 November 2021 (2021-11-10), CN , pages 100 - 106, XP093072248, ISSN: 1006-4990, DOI: 10.19964/j.issn.1006-4990.2021-0067
XUECHEN CAO, ZHOU DONGJIE, YAO HAIWEI, JU DIANCHUN: "Study on preparation of nanometer iron oxide and its kinetics by CC-OA DES treatment of iron-containing dust", WUJIYAN-GONGYE = INORGANIC CHEMICALS INDUSTRY, TIANJIN HUAGONG YANJIUSUO, CN, vol. 53, no. 11, 10 November 2021 (2021-11-10), CN , pages 100 - 106, XP093072248, ISSN: 1006-4990, DOI: 10.19964/j.issn.1006-4990.2021-0067
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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