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Abstract
This study focuses on the solid phase extraction method for the enrichment and separation of phenol from coal liquefaction oil. The phenols' separation efficiency was compared on different solid phase extraction (SPE) cartridges, and the effect of solvents with different polarity and solubility parameter on amino-bonded silica was compared for selection of optimal elution solution. The result showed that amino-bonded silica has the highest selectivity and best extraction capability due to two factors, weak anion exchange adsorption and polar attraction adsorption.
Acknowledgments
The authors greatly appreciate the financial support from NNSF of China (No. 20476068, 90410018), Shanxi Natural Science Funding (No. 20041008, 20051017), the Special Funds for Major State Basic Research Projects 973 (No. 2004CB2176002, 2005CB221201, 2005CB221207), NCET-05-0267, NCET-06-0261, and IRT0517 programs in MOE and Shanxi Returned Scholarship (2005-21, 2006-29). Special thanks goes to Beijing Research Institute of Coal Chemistry who supplied the coal liquefaction oil sample.