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http://dx.doi.org/10.14478/ace.2013.1110

Methanol Extraction of Nitrogen Heterocyclic Compound Contained in Model Coal Tar Fraction of Nine Components System  

Kim, Su Jin (Department of Cosmetic Science, Chungwoon University)
Kang, Ho Cheol (Convergence Chemistry Division, Korea Research Institutes of Chemical Technology)
Publication Information
Applied Chemistry for Engineering / v.25, no.2, 2014 , pp. 142-146 More about this Journal
Abstract
The separation of nitrogen heterocyclic compound (NHC) contained in a model coal tar fraction of nine components system was investigated by distribution equilibrium. The model coal tar fraction comprising NHC group (NHCs; indole (In), quinoline (Q), iso-quinoline (iQ), quinaldine(Qu)), bicyclic aromatic compound group (BACs; 1-methylnaphthalene (1MN), 2-methylnaphthalene (2MN), dimethylnaphthalene (DMN)), biphenyl (Bp) and phenyl ether (Pe) and the aqueous methanol were used as the raw materials and the solvent of this work, respectively. A batch-stirred tank was used as the liquid-liquid contact unit of this work. The distribution coefficient of NHCs increased by increasing the equilibrium operation temperature, whereas the selectivity of NHCs with respect to BACs decreased. Decreasing the initial volume ratio of water to the solvent resulted in deteriorating the selectivity of NHCs in reference to BACs, but improving the distribution coefficients of NHCs. At a fixed experimental condition, the sequence of the distribution coefficient and the selectivity with reference to BACs for each groups was increased in order of NHCs > Bp > BACs > Pe and NHCs > Bp> Pe, respectively. Also, the sequence of the distribution coefficient for entire compounds was in order of In > iQ = Q > Qu > Bp > 1MN = 2MN > Pe > DMN. The maximum yield of NHCs and the selectivity of NHCs based on BACs obtained by methanol extraction were 94 and 23%, respectively. Furthermore, the recovery process for NHCs from coal tar was studied by using the experimental results from this work.
Keywords
coal tar fraction; nitrogen heterocyclic compounds; indole; methanol extraction; distribution equilibrium;
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Times Cited By KSCI : 3  (Citation Analysis)
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