Process for the preparation of products to use, from an impure solution of ferric sulphate

摘要

b "process for the preparation of products to benefit from a solution of ferric sulphate impure" d .The invention relates to a process for the preparation of a product to use, in particular to a treatment solution containing ferric ion water.From an impure ferric sulfate solution which contains at least one metal as an impurity, the process comprising a first step of precipitation.It is added to said basic ferric sulfate solution, impure, in order to raise the pH of approximately 2 to 5, preferably 3 - 4.Where after the ferric hydroxide precipitates, then the first step of precipitation, a second stage of precipitation, which are added to the solution, an oxidant and a base.In order to raise the pH to about 6 to 10, preferably, about 8 - 9.Where, after the impurity metal precipitates; and one or more steps of precipitation to separate the solution of sulphate precipitated solids during the first and second steps of precipitation;Ust as possibly an additional step; in which said solids separated or a portion thereof, are further processed to form a product utility.