MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202621107658 A) filed by Indian Institute Of Technology Bombay on September 07, 2026, for “a Process Of Selective Separation Of Lithium From Lfp-Rich Black Mass”.
Inventors include Jayasree Biswas; and Pushpa Gautam.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: ABSTRACT “A PROCESS OF SELECTIVE SEPARATION OF LITHIUM FROM LFP-RICH BLACK MASS” The present invention relates to a method for recovering lithium from lithium iron phosphate (LFP)-rich material, particularly for selective separation of lithium from LFP-rich black mass. The method comprises sulfation roasting the LFP-rich material in a furnace (410) under a controlled gaseous atmosphere comprising sulfur dioxide and oxygen supplied from a gas supply panel (400), regulated by gas flow controllers (401) and mixed in a gas mixing chamber (402), to obtain water-soluble lithium sulfate. The roasted product is subjected to water leaching in a leaching vessel (503) using a magnetic bead (502) driven by a hot plate with magnetic stirrer (500), followed by vacuum filtration using filter paper (538) and a Buchner funnel (537) to obtain a lithium-bearing aqueous solution in a filtration flask (525). The solution is contacted with sodium carbonate solution (508) to precipitate lithium carbonate, which is washed with ethanol and dried in a drying oven (610) to obtain lithium carbonate. FIG. 2
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