MUMBAI, India, Oct. 11 -- Intellectual Property India has published a patent application (202517079298 A) filed by Ecotec Gestione Impianti S. R. L., Syracuse, Italy, on Aug. 21, for 'process for the production of high-purity alumina (hpa).'
Inventor(s) include Imerito, Aldo; Azara, Pierandrea; Malafronte, Francesca; Ragona, Mario; and Pisu, Massimo.
The application for the patent was published on Oct. 10, under issue no. 41/2025.
According to the abstract released by the Intellectual Property India: "The present invention relates to a process for the production of high-purity alumina (HPA), from kaolin, comprising the following steps: - conversion of the oxides in the kaolin into water-soluble sulphates and subsequent selective extraction of the aluminium, through the combination of: - thermal treatment, under dry digestion or acid baking conditions, of a single-phase paste-like mixture obtained by mixing sulphuric acid with a concentration of between 6M and 18.5M together with kaolin or thermally pre-treated kaolin; - leaching, with water, of the product obtained from the thermal treatment of the single-phase mixture of sulphuric acid/kaolin, with highly selective solubilisation of the aluminium sulphate formed and separation of the solid matrix; - selective recovery of the aluminium sulphate passed into the solution, through its transformation into solid aluminium ammonium sulphate (AAS); - purification of the solid aluminium ammonium sulphate (AAS); - calcination of the purified solid aluminium ammonium sulphate (AAS), with decomposition of the purified solid aluminium ammonium sulphate (AAS) and formation of high-purity alumina (HPA)."
The patent application was internationally filed on Feb. 22, 2024, under International application No.PCT/IT2024/050040.
Disclaimer: Curated by HT Syndication.
