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Received December 16, 2008
Accepted July 9, 2009
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Extraction of benzene from a narrow cut of naphtha via liquid-liquid extraction using pure-sulfolane and 2-propanol-sulfolane-mixed solvents
School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran
mnlotfollahi@semnan.ac.ir
Korean Journal of Chemical Engineering, January 2010, 27(1), 214-217(4), 10.1007/s11814-009-0328-y
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Abstract
The extraction of benzene from a narrow cut of naphtha produced by the Iranian petrochemical company has been studied at the operating temperatures of 40, 45 and 50 ℃, and four solvent-to-feed ratios (S/F) varied over the range of 1-4. Two extraction solvents, sulfolane as a pure-solvent and (sulfolane containing 7 wt% 2-propanol) as a mixed-solvent have been investigated for selective removal of benzene from the naphtha cut. The experimental results demonstrated that the mixed-solvent at 40 ℃ is a suitable solvent to replace sulfolane for an industrial extraction process for the separation of benzene from the naphtha cut because of its lower price and energy savings.
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