MUMBAI, India, April 10 -- Intellectual Property India has published a patent application (202411071629 A) filed by Council Of Scientific And Industrial Research, New Delhi, on Sept. 20, 2024, for 'process for production of agricultural fertilizers from acid waste left after modified hummer's method process.'
Inventor(s) include Nayaka Girish Praveen; and Shivamurthy Bogalera Papaiah.
The application for the patent was published on April 10, under issue no. 15/2026.
According to the abstract released by the Intellectual Property India: "A Process for The Recovery of Fertilizers from Acid Waste The present invention discloses a process for recovering NPK-based fertilizer components selected from diammonium phosphate sulfate, diammonium phosphate, ammonium potassium dihydrogen phosphate, potassium phosphate, ammonium sulphate, ammonium phosphate, diammonium phosphate, potassium sulphate and manganese sulphate from acid waste, the process comprising steps a) to d) in any sequence, a) adjusting the pH of an acid waste to 4 to obtain a precipitate comprising diammonium phosphate sulfate and a first residual solution, and/or b) adjusting the pH of an acid waste to 7 to obtain a precipitate comprising diammonium phosphate and a second residual solution, and/or c) adjusting the pH of an acid waste to 10 to obtain a precipitate comprising ammonium potassium dihydrogen phosphate and a third residual solution, and/or d) adjusting the pH of an acid waste to 12 to obtain a precipitate comprising potassium phosphate and fourth residual solution. The present invention also discloses an NPK-based fertilizer composition."
Disclaimer: Curated by HT Syndication.
