The Influence of Diluents on Tungstens Solvent Extractionin Alkaline Leach Liquor and Their Extraction Characters

The physical characters of several oil products from different oil refining factories and kerosene as diluents in tungsten solvent extraction with quaternary ammonium salt at home are determined, and then comparing them with SC-150 diluent of amine extractant at abroad. Several diluents applying in tungsten solvent extraction are investigated, the results show that the physical characters of three oil products are the same as kerosene and SC-150 diluent, reach extraction equilibrium in one minute for extracting tungsten with quaternary ammonium salt. The phase disengagement of oil products as diluents are better than kerosene, the time of phase disengagament of two oil products are shorter than four minutes and can supply them for the industrial production. The results shows that these diluents have little influence on the loading capacity and separation factors of tungsten separating from other impurities.