Beijing Sj Environmental Protection and New Material Co., Ltd.

Beijing Sj Environment Protection and New Material Co., Ltd.

Lixian Wang

Zhenyi Liu

A method for preparing magnetic iron oxide FeO, comprising the 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&#xb0; 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; (5) filtering, washing with water and drying said second mixture obtained in step (4) to yield a precursor; and (6) calcining the precursor obtained in step (5) at 250-400&#xb0; C.

Method for preparing magnetic iron oxide

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&#x2dc;0.8 and a reaction temperature not exceeding 30&#xb0; 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&#x2dc;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.

Growing community of inventors

Beijing, China

Lixian Wang