METHOD FOR PURIFYING NICKEL-COBALT-MANGANESE LEACHING SOLUTION

WIPO Patent Application WO/2022/052670

A1

The present invention belongs to the field of hydrometallurgy. Disclosed is a method for purifying a nickel-cobalt-manganese leaching solution. The method comprises the following steps: heating a nickel-cobalt-manganese leaching solution, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain iron-aluminum slag and a liquid with iron and aluminum removed therefrom; heating the liquid with iron and aluminum removed therefrom, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain copper slag and a solution with copper removed therefrom; heating the solution with copper removed therefrom, adding an alkaline solution thereto, adjusting the pH, reacting same, and filtering same to obtain a nickel-cobalt-precipitated solution and nickel-cobalt-manganese hydroxide; and adding water into nickel-cobalt-manganese hydroxide for slurrying, heating same, adding an acidic solution for dissolution, adjusting the pH, reacting same, heating same, adding a manganese powder thereto, adjusting the pH, and filtering same to obtain iron-aluminum slag and a nickel-cobalt-manganese sulfate solution which is up to standard. According to the present invention, firstly, ferrous iron in the solution system is oxidized using a manganese oxide ore, the pH value thereof is adjusted with a manganese carbonate ore by means of neutralization, iron and aluminum are removed, residual acid in the solution system is consumed, and manganese carbonate ore is also leached out for producing manganese sulfate.

WO/2019/029615	METHOD FOR CLEANLY PRODUCING VANADIUM TRIOXIDE BY VANADIUM-CONTAINING SOLUTION
JP7337609	Metal recovery method from ceramics

HE RAN (CN)
TANG HONGHUI (CN)
YE MINJIE (CN)
LYU DONGREN (CN)
LIU BO (CN)
LI CHANGDONG (CN)

PCT/CN2021/110265

March 17, 2022

August 03, 2021

Click for automatic bibliography generation  

GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)

C22B3/44; H01M10/54; C22B7/00

CN112159897A	2021-01-01
CN111471864A	2020-07-31
CN111206153A	2020-05-29
CN111261967A	2020-06-09
CN105981480A	2016-09-28

See also references of EP 4199185A4

ADVANCE CHINA IP LAW OFFICE (CN)

View/Download PDF      PDF Help

Previous Patent: BACKGROUND IMAGE GENERATION METHOD AND APPARATUS, STORAGE MEDIUM, AND ELECTRONIC DEVICE

Next Patent: METHOD FOR DISPLAYING WINDOW, METHOD FOR SWITCHING WINDOWS, ELECTRONIC DEVICE, AND SYSTEM