Production of concentrated aqueous solutions of fe

专利名称：Production of concentrated aqueous

solutions of ferric chloride

发明人：Rene Clair,Alain Gallet申请号：US08/032182申请日：19930315公开号：US05422091A公开日：19950606

摘要：Concentrated aqueous solutions of ferric chloride, directly useful as flocculatingagents in a variety of water treatments, are prepared by (a) digesting iron with a diluteaqueous solution of hydrochloric acid until such acid has essentially been consumed andthereby producing an aqueous solution of ferrous chloride; (b) reacting chlorine with suchaqueous solution of ferrous chloride, in the presence of a recycled aqueous solution offerric chloride; (c) decompressing the step (b) reaction product solution to vaporizewater therefrom, thereby concentrating same; and (d) recycling a fraction of the

decompressed liquid phase to step (b) and recovering remaining fraction as final productaqueous solution of ferric chloride.

申请人：ATOCHEM

代理机构：Burns, Doane, Swecker & Mathis

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