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http://dx.doi.org/10.14478/ace.2018.1073

Separation and Purification of 2,6-Dimethylnaphthalene Present in the Fraction of Light Cycle Oil by Crystallization Operation  

Kim, Su Jin (Department of Chemical Engineering, Chungwoon University)
Publication Information
Applied Chemistry for Engineering / v.29, no.6, 2018 , pp. 799-804 More about this Journal
Abstract
The separation and purification of 2,6-dimethylnaphthalene (2,6-DMN) present in the light cycle oil (LCO) fraction was investigated by a crystallization operation. Solute crystallization (SC) was performed using LCO fraction and iso-propyl alcohol as a raw material and a SC solvent, respectively. Increasing the operation temperature and volume ratio of the solvent to the raw material (S/F) resulted in improving the purity of 2,6-DMN, whereas the yield decreased. As a result of the crystallization operation in three steps containing the SC using LCO fraction (13.9% 2,6-DMN) and isopropyl alcohol, the re-crystallization 1 (RC 1) using the crystals recovered by SC and methyl acetate, and RC 2 using the crystals recovered by RC 1 and methyl acetate, the crystal with 99.9% 2,6-DMN was recovered with 19.5% yield. Furthermore, the separation and purification process of 2,6-DMN present in the LCO fraction was reevaluated by using the experimental results obtained through each operations of SC, RC 1, and RC 2.
Keywords
2,6-dimethylnaphthalene; light cycle oil fraction; crystallization; purification;
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Times Cited By KSCI : 2  (Citation Analysis)
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