Abstract
Vanadium pregnant solution recovered from the Syrian Petroleum coke by means of salt roasting was acidified by dilute sulfuric acid. Solvent extraction of tetravalent vanadium with a mixture of di(2-ethylhexyl) phosphoric acid (DEHPA) and Tributylphosphate (TBP) was carried out. Kinetic effects are involved in competitive extraction of other metals such as iron and aluminum.
Highlights
Vanadium is commercially important as a constituent of several alloys and catalysts
Merritt [13] indicated that, solvent extraction of vanadium from sulfuric acid solutions is possible with an organic phase containing from 3 to 10 percent di-2-ethylhexylphosphoric acid (DEHPA) and from 2 to 5 percent TBP in kerosene base, the actual content being varied depending upon the vanadium content of the feed solutions
The purpose of this paper is to evaluate the conditions of a selective solvent extraction of vanadium (IV) recovered from the Syrian petroleum coke with a mixture of DEHPA and TBP in kerosene
Summary
Vanadium is commercially important as a constituent of several alloys and catalysts. Nowadays, Vanadium is mostly recovered as a co-product from secondary sources or from industrial waste streams such as titaniferrous magnetite, fly ash, spent catalysts and petroleum coke. [7] and Zhang et al [8] showed that organophosphorus acid derivatives such as di-2-ethylhexylphosphoric acid (DEHPA) are the most convenient extractants for tetravalent vanadium. Tetravalent vanadium can be extracted by acidic organophosphorus reagents, e.g. Merritt [13] indicated that, solvent extraction of vanadium from sulfuric acid solutions is possible with an organic phase containing from 3 to 10 percent DEHPA and from 2 to 5 percent TBP in kerosene base, the actual content being varied depending upon the vanadium content of the feed solutions. The purpose of this paper is to evaluate the conditions of a selective solvent extraction of vanadium (IV) recovered from the Syrian petroleum coke with a mixture of DEHPA and TBP in kerosene
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