Title:
SHORT-PROCESS METHOD FOR PREPARING HIGH-PURITY METAL ARSENIC FROM ARSENIC-CONTAINING SOLID WASTE
Document Type and Number:
WIPO Patent Application WO/2023/179002
Kind Code:
A1
Abstract:
Disclosed in the present invention is a short-process method for preparing high-purity metal arsenic from arsenic-containing solid waste. The method comprises carrying out oxidative alkaline leaching on arsenic-containing solid waste in nonferrous metallurgy, so as to obtain an arsenic-containing alkaline leaching solution; sequentially adding into the arsenic-containing alkaline leaching solution a mixed magnesium-ammonium reagent consisting of a carboxyl and/or hydroxyl-containing water-soluble polymer organic matter, a magnesium compound and an ammonium compound, and a hydrophobic polymer organic matter having a periodic geometric structure, and stirring same for a reaction, so as to obtain organic matter-wrapped double arsenate crystals; and roasting the organic matter-wrapped double arsenate crystals, mixing same with carbon powder to carry out reduction roasting, and condensing and recovering metal arsenic from a flue gas. The method can not only achieve a safe disposal of the arsenic-containing solid waste in nonferrous metallurgy, but also implement resource utilization of arsenic components therein to prepare a high-purity metal arsenic product, and the method is simple, rapid, and highly-efficient, realizes low cost, and is satisfactory to industrial production.
Inventors:
SUN WEI (CN)
HAN HAISHENG (CN)
TIAN JIA (CN)
PENG JUN (CN)
WANG YUFENG (CN)
ZHANG YINGFEI (CN)
HU WENJIHAO (CN)
HU YUEHUA (CN)
HAN HAISHENG (CN)
TIAN JIA (CN)
PENG JUN (CN)
WANG YUFENG (CN)
ZHANG YINGFEI (CN)
HU WENJIHAO (CN)
HU YUEHUA (CN)
Application Number:
PCT/CN2022/126068
Publication Date:
September 28, 2023
Filing Date:
October 19, 2022
Export Citation:
Assignee:
UNIV CENTRAL SOUTH (CN)
International Classes:
C22B30/04; C22B1/00; C22B5/10; C22B7/00
Foreign References:
| CN114836635A | 2022-08-02 | |||
| CN108611494A | 2018-10-02 | |||
| CN113929328A | 2022-01-14 | |||
| CN106636678A | 2017-05-10 | |||
| CN111876601A | 2020-11-03 | |||
| US5114592A | 1992-05-19 |
Attorney, Agent or Firm:
CHANGSHA RONG ZHI PATENT AGENCY et al. (CN)
Download PDF: