Extraction separation of germanium with hydroxamic acid HGS98

Shu-fang Tang; Chun-shan Zhou; Xin-yu Jiang; Chun-lei Zhao

doi:10.1007/s11771-000-0011-2

Journal of Central South University ›› 2000, Vol. 7 ›› Issue (1) : 40 -42. DOI: 10.1007/s11771-000-0011-2

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Extraction separation of germanium with hydroxamic acid HGS98

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Abstract

The extraction separation of germanium from indium raffinate in hydrometallurgical zinc process was discussed. The conditions and mechanism of the extraction with hydroxamic acid HGS98 have been investigated in detail. The results show that using 2% (mass fraction) hydroxamic acid HGS98 and 5% D₂EHPA as synergist, germanium is extracted (1-stage) over 99% in 5 min at phase ratio (V_o: V_a) of 1:5 from indium raffinate with original acidity. Then, using 2 mol·L⁻¹ NH₄F as strip liquor, the stripping recovery is over 98% in 15 min at phase ratio of 1:1. This process has the following advantages: easy to operate, high recovery and selectivity, and lower investment cost. It provides a new way to recover rare metal — germanium from metallurgical spent residues.

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extraction / separation / germanium / hydroxamic acid HGS98

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Shu-fang Tang, Chun-shan Zhou, Xin-yu Jiang, Chun-lei Zhao. Extraction separation of germanium with hydroxamic acid HGS98. Journal of Central South University, 2000, 7(1): 40-42 DOI:10.1007/s11771-000-0011-2