Simultaneous extraction of molybdenum and silicon from sulphate leach solution of spent catalyst using trialkylamine (N235) and recovery of pure ammonium molybdate

被引：2

作者：

Shi, Wenhui ^{[1
,2
]}

Li, Jian ^{[2
,3
]}

Lai, Yaobin ^{[1
,2
]}

Zhang, Hui ^{[2
,3
]}

Zhang, Huadong ^{[4
]}

Zhang, Xuxia ^{[2
,3
]}

Liu, Kejia ^{[2
,3
]}

Qi, Tao ^{[1
,2
,3
,5
]}

机构：

[1] Univ Sci & Technol China, Sch Rare Earths, Hefei 230026, Peoples R China

[2] Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China

[3] Jiangxi Prov Key Lab Cleaner Prod Rare Earths, Ganzhou 341000, Peoples R China

[4] Sinopec Catalyst Co Ltd, Beijing 100029, Peoples R China

[5] Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China

来源：

HYDROMETALLURGY | 2024年 / 227卷

基金：

中国国家自然科学基金;

关键词：

Molybdenum; Silicon; Solvent extraction; Spent catalyst; LIQUID-LIQUID-EXTRACTION; SOLVENT-EXTRACTION; SEPARATION; VANADIUM; WASTE;

D O I：

10.1016/j.hydromet.2024.106308

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Spent catalyst of molybdenum with silicon dioxide, commonly used as the carrier, is an important secondary resource for recovery of molybdenum. This work proposes a process to recycle molybdenum and remove silicon simultaneously by solvent extraction. The sulfuric acid leachate of the spent catalyst was contacted with the trialkylamine N235 (R3N, R = C-8-C-10), to extract molybdenum and silicon. Several vital parameters were investigated to explore the influence on extraction and stripping. The extraction efficiencies of molybdenum and silicon were up to 99.6% and 77.1% after three-stage countercurrent extraction under optimized condition. The extraction reactions were determined by maximum loading capacity and FT-IR. The peak at 802.1 cm(-1) was caused by the stretching vibration of Si-O-Si, indicating the co-extraction of silicon. Molybdenum and silicon in the loaded organic phase can be stripped by the mixture of solution containing 7.00 mol/L NH4OH and 0.80 mol/L (NH4)(2)CO3, and the stripping efficiencies were >99.0%. Ammonium molybdate was prepared by removing silicon and evaporating, and the purity was 99.9%.

引用

页数：9