US 12,378,639 B2
Process and system for recovering manganese from high-pressure leaching system of laterite nickel ore
Satryo Soemantri Brodjonegoro, Jakarta (ID); Kaihua Xu, Shenzhen (CN); Evan Wahyu Kristiyanto, Jakarta (ID); Nurul Lailatul Muzayadah, Jakarta (ID); Tegar Mukti Aji, Jakarta (ID); Andi Syaputra Hasibuan, Jakarta (ID); Rizky Wanaldi, Jakarta (ID); and Tao Cui, Jakarta (ID)
Assigned to PT ESG NEW ENERGY MATERIAL, Jakarta (ID); PT QMB NEW ENERGY MATERIALS, Jakarta (ID); GEM CO., LTD., Shenzhen (CN); and PT GEM INDONESIA NEW ENERGY MATERIALS, Jakarta (ID)
Appl. No. 18/870,422
Filed by PT ESG NEW ENERGY MATERIAL, Jakarta (ID); PT QMB NEW ENERGY MATERIALS, Jakarta (ID); GEM CO., LTD., Shenzhen (CN); and PT GEM INDONESIA NEW ENERGY MATERIALS, Jakarta (ID)
PCT Filed Jul. 31, 2023, PCT No. PCT/CN2023/110214
§ 371(c)(1), (2) Date Nov. 28, 2024,
PCT Pub. No. WO2025/025052, PCT Pub. Date Feb. 6, 2025.
Prior Publication US 2025/0171878 A1, May 29, 2025
Int. Cl. C22B 47/00 (2006.01); C22B 3/00 (2006.01); C22B 3/02 (2006.01); C22B 3/26 (2006.01); C22B 3/44 (2006.01)
CPC C22B 47/00 (2013.01) [C22B 3/02 (2013.01); C22B 3/26 (2021.05); C22B 3/44 (2013.01); C22B 23/0407 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for recovering manganese from a high-pressure leaching system of laterite nickel ore, comprising the following steps:
S1. adding limestone to the high-pressure leaching solution of the laterite nickel ore for preneutralization to obtain first-stage carbon dioxide and a neutralization solution, adding limestone in the neutralization solution for precipitation of iron and aluminum to obtain second-stage carbon dioxide and a slurry, and adding liquid alkali to the slurry for precipitation of nickel-cobalt-manganese to obtain nickel-cobalt-manganese hydroxide and a nickel-cobalt-manganese precipitated lean solution;
S2. collecting first-stage carbon dioxide and second-stage carbon dioxide and passing same into the nickel-cobalt-manganese precipitated lean solution, adjusting the pH value of the nickel-cobalt-manganese precipitated lean solution to 5-6.5 by using liquid alkali, and then performing a precipitation reaction to obtain a crude manganese carbonate; and
S3. dissolving the crude manganese carbonate by using sulfuric acid to obtain a dissolution liquid and third-stage carbon dioxide, then removing calcium and magnesium from the dissolution liquid to obtain a manganese sulfate solution and then evaporating and crystallizing to obtain manganese sulfate crystals; recycling the third-stage carbon dioxide and introducing same into a nickel-cobalt-manganese precipitated lean solution.