MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202511014065 A) filed by Council Of Scientific And Industrial Research on February 18, 2025, for Extraction Of Vanadium As High Pure V2o5 From Pet-Coke/Coal Gasification Cinders And Process Thereof.
Inventors include Devabarta Mishra; Kamala Kanta Sahu; Sanjay Agarwal; Shivendra Sinha; Saurabh Shekhar; Shibsundar Das; and Susmita Mohanta.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: The present invention provides an efficient process for the selective extraction of Vanadium from pet coke/coal gasification cinders with an overall Vanadium extraction efficiency of 90%. The invented process employs (i) an innovative direct sulfuric acid leaching of fine cinders in presence of an additive & oxidizing agent, (ii) selective extraction of vanadium by a mixture of organic reagents comprising of Di-(2-ethylhexyl) phosphoric acid (D2EHPA), Tri-butyl phosphate (TBP) and Iso- decanol dissolved in Kerosene, (iii) back-extraction of vanadium from the organic phase by an alkali solution. The back extracted vanadium from the alkali solution was precipitated as ammonium meta-vanadate (AMV) by addition of an ammonium salt in excess. Calcination of the ammonium meta-vanadate (AMV) in an inert atmosphere yielded high pure (99%) V2O5.
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