Improved process of Ion Exchange and Regeneration for the Separation and removal of Iron (iii) ions from Aqueous Solutions of sulfuric acid containing metal ions

摘要

Refers to a process that includes: i) contacting an aqueous solution of sulfuric acid containing metal ions.Preferably Iron (iii) ions and Ion Valence of + 3 Minor such as Manganese (ii), Copper (ii), and cobalt (ii)Gradient Copolymer with an insoluble suspended geminal diphosphonate with multiple groups of formula (po3r2) or - CH 2 C (po3r2) 2, where r is a monovalent or divalent cation and HydrogenAMMONIUM or alkali metal cation (i), (ii) maintain enough time to form Iron (iii) ions linked solid phase and a Liquid Phase containing sulfuric acid and aqueous ionsLower Valence of + 3; (iii) to separate the solid phase and the liquid Phase; (iv) contacting the solid phase with an aqueous solution of Free SO2 Reduction which contains 0.1 m to 6 m Sulphuric Acid and Copper ions (i) sufficient to reduce iron (iii) ions of Solid Phase bound to iron (ii) ions to form a Second Solid Phase / liquid mixture; (V)Er the mixture in (iv) at a temperature of between 95 and 65u00b0C in enough time to form a Liquid Phase reduction of Aqueous solution with iron (ii) ions and a Middle Heat exchangerIon Composition and solid phase; (VI) to separate the liquid Phase Medium Heat exchanger