| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a ferric sulfate solution to improve the operability without developing a slurried state during the production process, with no concern about the wear of the production apparatus and pressure loss and cloggings, etc., inside the pipings, and conduct the oxidation reaction in a considerably short time compared to the conventional case. SOLUTION: This method for producing a ferric sulfate solution comprises the following process: an iron sulfate solution with ferrous ions as the main component is prepared so that the molar ratio of the iron ions to sulfate ions is 1-1.8 and the total iron concentration 3.0-8.0 wt.%, the ferrous ions are then oxidized to ferric ions, and the resultant ferric sulfate solution is concentrated at a temp. of <=75 deg.C so as to be 10.0-13.0 wt.% in ferric ion concentration.
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