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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 9, Number 1
February 20, 1965 

Studies on Magnesia Production. Production of Magnesium Hydroxide from Bittern and Sea Water

마그네시아 제조에 관한 연구 간수, 해수로 부터 수산화마그네슘 제조
Jung Jae Maeng, In Soon Chang

맹중재, 장인수
One of the difficult and time consuming problems in the production of magnesia from sea water is a settling rate of magnesium hydroxide. In this experimeats, authors attempted to accelerate its settling rate by addition of various sedimenting agents as C.M.C., Separan and Starch, and sought for optimum calcination temperature for domestic dolomite, as alkali source, mole ratio of dolomite milk to bittern. It is observed through experiments that the small amounts of sedimenting agents, C.M.C., Separan, starch, 20 mg/l, 40 mg/l, 400mg/l, respectively increase the settling rate of magnesium hydroxide by 8 times or more. The following conditions resulted in good yield of magnesium hydroxide from sea water with relatively tolerable calcium oxide contaminated for the magnesium clinker. Calcinating temperature, 1,100∼1,200℃, mole ratio of 10% dolomite milk to magnesium salts in sea water or bittern, 1. 2 : 1.
49 - 54
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