Cj Cheiljedang Corporation

Korea Institute of Geoscience and Mineral Resources

Kee Kahb Koo

Hee Dong Jang

Jun-Woo Kim

Allan Stuart Myerson

In Sung Lee

Dae Sup Kil

Yong Jae Suh

Jae Kyeong Kim

Wang Soo Kim

Han Sang Oh

The present application relates to a method for preparing L-methionine crystals with an improved bulk density. As the L-methionine crystals prepared according to the method for preparing L-methionine crystals of the present application may have a bulk density of up to 800 g/L, the L-methionine crystals are expected to reduce storage and transport costs of L-methionine powder and improve working conditions due to improved fluidity of the powder.

Method for preparing L-methionine crystals using crystallization technique

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.

Preparation of iron(II) acetate powder from a low grade magnetite

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Seoul, South Korea

Kee Kahb Koo