, Volume 70, Issue 4, pp 581–586 | Cite as

Comparison of 2-Octanol and Tributyl Phosphate in Recovery of Tungsten from Sulfuric–Phosphoric Acid Leach Solution of Scheelite

  • Yulong Liao
  • Zhongwei Zhao
Technical Communication


Tungsten was recovered from sulfuric–phosphoric acid leach solution of scheelite using 2-octanol and tributyl phosphate (TBP). Approximately 76% of the tungsten and less than 6.2% of the iron were extracted when using 70% 2-octanol, showing good selectivity for tungsten over iron; the tungsten extraction could not be significantly enhanced using a three-stage countercurrent simulation test. Moreover, more than 99.2% of the W and 91.0% of the Fe were extracted when using 70% TBP, showing poor selectivity, but after pretreating the leach solution with iron powder, less than 5.5% of the Fe was extracted. The loaded phases were stripped using deionized water and ammonia solution. The maximum stripping rate of tungsten from loaded 2-octanol was 45.6% when using water, compared with only 13.1% from loaded TBP. Tungsten was efficiently stripped from loaded phases using ammonia solution without formation of Fe(OH)3 precipitate. Finally, a flow sheet for recovery of tungsten with TBP is proposed.



This work is financially supported by the National Natural Science Foundation of China (No. 51334008). We thank Xiamen Tungsten Co., Ltd., China for provision of leach solution.


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangshaChina

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