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Received March 20, 2016
Accepted June 14, 2016
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Optimization of operating conditions in the purification of graphite oxide dispersions
School of Chemical Engineering & Technology, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, P. R. China
zhuguorui@tju.edu.cn
Korean Journal of Chemical Engineering, November 2016, 33(11), 3251-3257(7), 10.1007/s11814-016-0164-9
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Abstract
In the graphite oxide (GO) suspension purification process, some metallic impurities in GO cannot be separated. The residual metallic impurities dominate graphite oxide properties and have a negative influence on applications. Therefore, the removal of metallic impurities from graphite oxide has been brought into focus now. Single factor experiments and orthogonal experiments are used to get the optimal purification condition. The results show that purification agent, temperature, stirring intensity and contact time affect the purification degree, and the purification agent is the most important element for the purification efficiency. The optimal purification condition is 10% hydrochloric acid (H10), 20 ℃, 0 rpm and 60 min. Besides, the theoretical stage is calculated by the mass conservation equation and distribution balance equation and the minimum stage is 3 under the optimal purification condition.
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Li Y, Wang CL, Guo ZJ, Liu CL, Wu WS, J. Radioanal. Nucl. Chem., 299, 1683 (2014)
Chen CM, Yang QH, Yang YG, Lv W, Wen YF, Hou PX, Wang MZ, Cheng HM, Adv. Mater., 21(29), 3007 (2009)
Ryu KH, Lee C, Lee GG, Jo S, Sung SW, Korean J. Chem. Eng., 30(10), 1946 (2013)
