발간논문

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Vol.24, No.3, 227 ~ 233, 1986
Title
Production of Aluminum Chloride from HCl - Leaching of Clay Mineral
손용운Yong Un Sohn, 김대수Dae Soo Kim, 임석중Suk Joong Im
Abstract
The extraction of alumina as a chloride from the calcined clay was about 91% when leached with a 20 w/o HCl solutions for two hours. Alumina extraction from the uncalcined clay was 80% when leached with 20 w/o HCl at 110℃ for 4½ hrs. It was found that the leaching rate was influenced by temperature, acid concentration, and not by particle sizes. From the temperature dependence of the leaching rate, the activation energy was determined to be 7.7 Kcal/㏖. The impurity in pregnant solution, Fe, was removed to the degree of 91% using the solvent extraction technique under the condition of 30 v/o-TBP and O/A=1.
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