# US 12,000,012 B2 · Method for extracting nickel from high matte nickel leaching residue

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,000,012 B2
- Document ID: US12000012B2
- Status: Granted
- Kind: B2
- Application number: 18/552,447
- Filed: 2022-06-06
- Published: 2024-03-14
- Granted: 2024-06-04
- Earliest claimed: 2021-07-29
- Assignees: Guangdong Brunp Recycling Technology Co., Ltd.; Hunan Brunp Recycling Technology Co., Ltd.; Hunan Brunp Ev Recycling Co., Ltd.
- Applicants: Guangdong Brunp Recycling Technology Co., Ltd.; Hunan Brunp Recycling Technology Co., Ltd.; Hunan Brunp Ev Recycling Co., Ltd.
- Inventors: Haijun Yu; Yinghao Xie; Aixia Li; Xuemei Zhang; Changdong Li
- Web page: https://patentgrep.com/patent/US12000012B2

## CPC

- C22B 7/006: {Wet processes}
- C22B 23/0461: {by chemical methods}
- C01G 3/10: Sulfates
- C22B 3/22: by physical processes, e.g. by filtration, by magnetic means {, or by thermal decomposition} (treatment or purification of solutions by liquid-liquid extraction C22B3/26)
- C22B 3/3844: {Phosphonic acid, e.g. H2P(O)(OH)2}
- C22B 3/3846: {Phosphoric acid, e.g. (O)P(OH)3}
- C22B 3/44: by chemical processes (treatment or purification of solutions by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42)
- C22B 7/005: {Separation by a physical processing technique only, e.g. by mechanical breaking}
- C22B 15/0063: {Hydrometallurgy}
- C22B 23/04: {by wet processes (recovery or separation of nickel or cobalt using organic agents C22B3/00)}
- Y02P 10/20: Recycling
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Disclosed in the present invention is a method for extracting nickel from a high matte nickel leaching residue. The method comprises: firstly, adding a crushed material of a high matte nickel leaching residue to an organic solvent in which sulfur is dissolved, heating same for reaction, and carrying out solid-liquid separation to obtain a first filtrate and a first filter residue; adding the first filter residue to a copper sulfate solution, heating same for reaction, and carrying out solid-liquid separation to obtain a second filtrate and a second filter residue; and evaporating, condensing and concentrating the second filtrate, and filtering same to obtain copper sulfate crystals and a nickel-containing filtrate. Throughout the whole reaction, only a small amount of sulfur and copper sulfate are consumed, and the organic solvent can be recycled.

## Claims

### Claim 1

A method for extracting nickel from high nickel matte leaching residue, comprising the following steps:
S1: adding a pulverized material of high nickel matte leaching residue to an organic solvent in which sulfur is dissolved, heating to perform reaction, and performing solid-liquid separation to obtain a first filtrate and a first filter residue; wherein a concentration of the sulfur in the organic solvent is 10-700 g/L; a solid-to-liquid ratio of the pulverized material to the organic solvent is 1 g:(0.5-5) mL; a temperature of the heating is 80-120° C.; and a time of the reaction is 1-5 h;
S2: adding the first filter residue to a copper sulfate solution, heating to perform reaction, and performing solid-liquid separation to obtain a second filtrate and a second filter residue; wherein a concentration of the copper sulfate solution is 0.1-4.0 mol/L; a solid-to-liquid ratio of the first filter residue to the copper sulfate solution is 1 g:(0.5-5) mL, a temperature of the heating is 80-180° C.; a time of the reaction is 2-8 h; and the second filter residue is used for making copper; and
S3: evaporating, condensing and concentrating the second filtrate, and performing filtration to obtain copper sulfate crystals and a nickel-containing filtrate.

### Claim 2 (depends on 1)

The method according to claim 1, wherein in step S1, the organic solvent is selected from one or more of carbon disulfide, carbon tetrachloride, methylcyclohexane, trichloroethane, trichloroethylene, tetrachloroethane, diethylene glycol dimethyl ether, tetrahydronaphthalene, and decahydronaphthalene.

### Claim 3 (depends on 1)

The method according to claim 1, wherein in step S3, an extractant is added to the nickel-containing filtrate to perform extraction, and the filtrate is left to stand and separated to obtain a nickel-containing extraction organic phase and a raffinate; and then nickel is back-extracted from the nickel-containing extraction organic phase with a sulfuric acid solution to obtain a nickel sulfate solution.