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

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

Fengren Liu

Zhenyi Liu

Ke Lin

Jie Zhang

Wenjun Mao

Yongsheng Yu

A method of preparing magnetic iron oxide FeO, which includes the steps of preparing a solid green rust and calcining the solid green rust to obtain the magnetic iron oxide FeO. Also provided is the application of magnetic iron oxide FeOas an active material in desulfurization at a medium temperature. Also provided is a desulfurizer which uses magnetic iron oxide FeOand the application thereof. The present preparation method has simple steps and a short production period.

Preparation method and application of magnetic iron oxide and desulfurizer containing the magnetic iron oxide as active component

Methods for regenerating amorphous iron oxide hydroxide after being used as desulfurizer by (1) grinding a waste mixture into waste powder, wherein the waste mixture results from use of the composition comprising amorphous iron oxide hydroxide as desulfurizer; (2) preparing the waste powder into a suspension and charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur; and (3) placing the slurry or a solid resulting from filtering the slurry into a container and charging the slurry or the solid with air so that the elemental sulfur floats and the amorphous iron oxide hydroxide precipitates.

Method for regenerating amorphous iron oxide hydroxide and desulfurizer containing amorphous iron oxide hydroxide as active component

The present invention discloses a composition for a desulfurizer with a high sulfur capacity and a process for making the same. The composition comprises the active components of three kinds of iron oxides and is used in the desulfurizer to remove hydrogen sulfide from the gaseous and liquid state feed stocks. The process for preparing the composition comprises the following steps: (1) mixing a solid ferrous compound with a solid hydroxide at a molar ratio of iron to hydroxyl being in the range from 1:2 to 1:3; (2) kneading the mixture feeds obtained in step (1) and making them react completely; (3) drying the products obtained in step (2) in the air; (4) washing and filtering the feeds obtained in the step (3); (5) naturally drying or baking the solids obtained in step (4) to form a composition for a desulfurizer with a high sulfur capacity.

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Beijing, China

Fengren Liu