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http://dx.doi.org/10.14478/ace.2018.1051

Recovery of Paraffin Components from Pyrolysis Oil Fraction of Waste Plastic by Batch Cocurrent 4 Stages Equilibrium Extraction  

Kang, Ho-Cheol (Environmental Resources Research Center, Korea Research Institutes of Chemical Technology)
Shin, Sung Soon (Division of Overseas Business, Omega Energy Inc.)
Kim, Doo Han (Department of Chemical Engineering, Chungwoon University)
Kim, Su Jin (Department of Chemical Engineering, Chungwoon University)
Publication Information
Applied Chemistry for Engineering / v.29, no.5, 2018 , pp. 630-634 More about this Journal
Abstract
The recovery of paraffin components contained in the fraction as a part of improving the quality for the fraction of waste plastics pyrolysis oil (WPPO) was investigated by batch cocurrent 4 stages equilibrium extraction. The fraction at a distilling temperature of $120-350^{\circ}C$ recovered from WPPO by the simple distillation and a little water-added dimethylformamide (DMF) solution were used as a raw material and solvent, respectively. As the number of equilibrium extraction (n) and the carbon number of paraffin component increased, the concentration of paraffin component contained in the raffinate increased. The concentrations of $C_{12}$, $C_{14}$, $C16$ and $C_{18}$ paraffin components present in the raffinate recovered at n = 4 were about 1.2, 1.5, 1.6 and 1.8 times higher than those of using the raw materials, respectively. Recovery rates (residue rates present in raffinate) of paraffin components rapidly decreased with increasing n, and increased sharply with increasing the carbon number. Furthermore, it was possible to predict the recovery rates at n = 1 - 4 for all paraffin components ($C_7-C_{24}$) contained in the raw material. The raffinate recovered through this study is expected to be used as a renewable energy.
Keywords
waste plastic; pyrolysis oil fraction; solvent extraction; paraffin component; raffinate;
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