MUMBAI, India, May 30 -- Intellectual Property India has published a patent application (202527035192 A) filed by Metso Metals Oy, Espoo, Finland, on April 10, for 'process and plant for a permanent storage of phosphogypsum.'
Inventor(s) include Orth Andreas; Storch Hannes; Scarsella Alessio; Hammerschmidt Joerg; and Daum Karl Heinz.
The application for the patent was published on May 30, under issue no. 22/2025.
According to the abstract released by the Intellectual Property India: "The invention is directed to a process and the related plant for the permanent deposition of phosphogypsum with simultaneous permanent carbon dioxide sequestration. This process comprises a step (i) for decomposition calcium sulfate contained in the phosphogypsum with hydrogen to calcium oxide sulfur dioxide and water at temperatures between 1.000 and 1.400 ??C. Thereby a gas stream containing the sulfur dioxide and the water and a solid stream containing the produced calcium oxide result. In a further step (ii) production of sulfuric acid takes place by converting the sulfur dioxide. In step (iii) the calcium oxide contained in the solid stream is carbonized with carbon dioxide to a calcium carbonate at temperatures between 500 and 800 ??C to obtain a solid material. Finally the solid material obtained in step (iii) is deposited in a last step (iv)."
The patent application was internationally filed on Oct. 11, 2022, under International application No.PCT/FI2022/050676.
Disclaimer: Curated by HT Syndication.
