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http://dx.doi.org/10.14478/ace.2014.1042

High-Purity Purification of Indole Contained in Coal Tar Absorption Oil by Extraction-Distillation-Crystallization Combination  

Kim, Su Jin (Department of Cosmetic Science, Chungwoon University)
Publication Information
Applied Chemistry for Engineering / v.25, no.3, 2014 , pp. 330-336 More about this Journal
Abstract
Purification of indole contained in model coal tar absorption oil was examined by extraction-distillation-crystallization combination. The absorption oil consists of nine components such as four kinds of nitrogen heterocyclic compounds (9.2% quinoline, 2.4% iso-quinoline, 4.7% indole, 2.4% quinaldine), three kinds of bicyclic aromatic compounds (14.2% 1-methylnaphthalene, 31.8% 2-methylnaphthalene, 23.5% dimethylnaphthalene), 5.5% biphenyl and 3.3% phenyl ether. 99.5% indole was recovered by combination of formamide extraction-distillation-solute crystallization using n-hexane. Furthermore, the recovery process of indole contained in coal tar absorption oil was studied by using the experimental results obtained by each operation of this work.
Keywords
Coal tar absorption oil; Nitrogen heterocyclic compounds; Indole; High-purity purification; Extraction-distillation-crystallization combination;
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Times Cited By KSCI : 2  (Citation Analysis)
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