【摘 要】
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A numerical model is developed to describe the counter current chromatography (CCC) separation process in this work.The theory of counter current extraction
【机 构】
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College of Chemistry and Chemical Engineering,Research Center of Modernization of Chinese Medicines,
【出 处】
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The 6th International Conference on Separation and Technolog
论文部分内容阅读
A numerical model is developed to describe the counter current chromatography (CCC) separation process in this work.The theory of counter current extraction [1] is firstly introduced to calculate concentration distributions of the components in the CCC,which is essentially a numerical model to describe the dynamic equilibrium of counter current extraction.According to the theory of counter current extraction,the concentration in the chromatography obeys binomial distribution while the outflow from the nth stage is a negative binomial distribution.As a result of central limit theorem,they will obey normal distribution for sufficiently large n.Row-stage ratio (RRS) was then defined to determine the K or retention time,which has a linear relationship to K value and retention time.The stage for a certain K value can be obtained with a very simple form,nk =1/(2πqkX2k,max),which can be derived from the peak height obtained from experiments.The actual stage for a separation chromatogram can then be acquired with this simple expression.The agreement between theoretic and experimental results is quite satisfactory.
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