Method for preparing amorphous iron oxide hydroxide

摘要

A method for preparing amorphous iron oxide hydroxide, comprising following steps: (1) preparing a ferrous salt solution with solid soluble ferrous salt; (2) preparing a hydroxide solution; (3) mixing said hydroxide solution and said ferrous salt solution in a co-current manner for reaction at an alkali ratio of 0.6˜0.8 and a reaction temperature not exceeding 30° C.; (4) after the reaction in step (3) is finished, yielding a first mixture, then charging said first mixture with a gas containing oxygen for oxidation, and controlling the first mixture at a pH value of 6˜8 until the oxidation is finished to yield a second mixture; and (5) filtering, washing with water and drying said second mixture obtained in step (4) to yield the amorphous iron oxide hydroxide.

主权项

1. A method for preparing amorphous iron oxide hydroxide which comprises following steps:
preparing a ferrous salt solution with a solid, soluble ferrous salt, preparing a hydroxide solution, forming a first mixture by mixing and reacting the hydroxide solution and the ferrous salt solution in a co-current manner by controlling the ferrous salt solution feeding speed to 200-300 ml/min. and the hydroxide solution feeding speed to 50-60 ml/min.; by controlling the reaction temperature to not more than 30° C. and by controlling the alkali ratio of the hydroxide solution and the ferrous salt solution to 0.6 to 0.8, oxidizing the first mixture with an oxygen-containing gas at a pH of 6-8 to yield a second mixture, and filtering, washing with water and drying said second mixture to obtain the amorphous iron oxide hydroxide.