MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617097041 A) filed by Morozov, Denis Anatolevich; and Gladkov, Oleg Andreevich on August 11, 2026, for Method For Producing Chelate Complexes Of Lignosulfonates.
Inventors include Morozov, Denis Anatolevich; and Gladkov, Oleg Andreevich.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: The method for obtaining chelate complexes is earned out by nitrating aqueous solutions of lignosulfonates in 30-55.0 wt.% nitric acid, while maintaining the temperature within the range of 25-35°C. Salts of biogenic metals are added with constant stirring, while maintaining the temperature from 35 to 50°C not earlier than 30 minutes after the completion of the addition of nitric acid. After dissolving all the components, the solution is gradually stabilized by adding KOH or ammonia water, initially for 30 minutes until a pH of 3.0-3.5 is reached, after which for 60 minutes until a pH of 4.5-5.5 is reached. The technical result of the invention consists in ensuring long-term stability of the solution form of the target complex at a high concentration of retained biogenic metals.
Disclaimer: Curated by HT Syndication.
