Abstract: The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. According to the present invention, it is possible to obtain high purity iron(II) acetate using low grade magnetite and there are advantages of mass producible environmentally-friendly simple process and prevention of corrosion of facilities.

Abstract: There is provided a method for preparing an ion exchange type lithium adsorbent using a filter including: synthesizing precursor powder as lithium manganese oxide having a spinel structure; filling the precursor powder in the filter; and acid-treating the filter filled with the precursor powder.

Abstract: A method for manufacturing alloy nanopowders is disclosed, which comprises a step in which a wire manufactured in such a manner that at least one hetero metal is coated on a metallic wire is used to manufacture alloy nanopowders. At least one hetero metal is coated on a pure metal wire or an alloy wire based on an electroplating method, an electroless plating or other methods. The alloy wire is electrically exploded for thereby manufacturing at least two-component alloy nanopowder.