MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541122138 A) filed by Vellore Institute Of Technology, Vellore, Tamil Nadu, on Dec. 4, 2025, for 'method for removing a pharmaceutical compound from aqueous solutions using recycled graphite from spent lithium-ion batteries.'
Inventor(s) include Dr. Shantha Kumar S; Ms. Niranjana Naveen; Ms. Melissa Hemam; and Mr. Daeborlangmi Shylla K.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure provides a method (100) for removing pharmaceutical compounds from aqueous solutions using recycled graphite from spent lithium-ion batteries. The method (100) includes obtaining and completely discharging spent lithium-ion batteries (102), submerging copper sheets coated with graphite in N-Methyl-2-Pyrrolidone solution (104), heating the solution for approximately 2 hours to dissolve polyvinylidene fluoride binder (106), scraping the graphite from copper sheets (108), washing and drying the scraped graphite to obtain raw graphite powder (110), adding the raw graphite powder to an aqueous solution containing pharmaceutical compounds (118), and removing the pharmaceutical compound through adsorption onto the raw graphite powder (120). The method (100) may further include immersing the raw graphite powder in 0.25 M hydrogen peroxide solution overnight (114) and centrifuging and drying the treated graphite to obtain modified graphite powder (116) for enhanced adsorption performance."
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