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Antimony recovery from SbCl5 acid solution by hydrolysis and aging

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Abstract

This study aimed to find an efficient way to recover Sb from the SbCl5 acid solution obtained by the chloride leaching process of the tin-depleted residue. Sb was recovered in the form of hydrated antimony pentoxide through the hydrolysis process. The effects of hydrolysis ratio and aging time on the Sb recovery process were studied, and the corresponding trends were established. The experimental results show that the amount of the antimony free ions increases with the hydrolysis ratio and aging time. This decreases the concentration quotient of the hydrolysis reaction and thus facilitates the reaction. Product crystallinity is affected by the solution supersaturation, which varies at different stages with aging time. As a result, the optimal conditions of recovering Sb correspond to the hydrolysis ratio of 1.5 and aging time of 7 days with the recovery rate of 97 %.

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Acknowledgments

The work was financially supported by the National Natural Science Foundation of China (Nos. U1360202 and 51472030), the National Key Project of the Scientific and Technical Support Program of China (Nos. 2011BAE13B07, 2012BAC02B01 and 2011BAC10B02), the National Hi-Tech R&D Program of China (No. 2012AA063202), the Fundamental Research Funds for the Central Universities (No. FRF-TP-14-043A1), the China Postdoctoral Science Foundation Funded Project (No. 2014M560885), the Beijing Nova Program (No. Z141103001814006) and Sichuan Province Cyclic Economy Research Center.

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Authors and Affiliations

  1. Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Ling Meng, Shen-Gen Zhang, De-An Pan, Bin Li & Jian-Jun Tian

  2. Department of Mechanical Engineering, University of South Florida, Tampa, FL, 33620, USA

    Alex.-A. Volinsky

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  1. Ling Meng
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  2. Shen-Gen Zhang
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  3. De-An Pan
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  4. Bin Li
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  5. Jian-Jun Tian
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  6. Alex.-A. Volinsky
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Correspondence to Shen-Gen Zhang.

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Meng, L., Zhang, SG., Pan, DA. et al. Antimony recovery from SbCl5 acid solution by hydrolysis and aging. Rare Met. 34, 436–439 (2015). https://doi.org/10.1007/s12598-015-0480-y

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  • DOI: https://doi.org/10.1007/s12598-015-0480-y

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