Separation of m-cresol from neutral oils with liquid-liquid extraction

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dc.contributor.authorVenter D.L.
dc.contributor.authorNieuwoudt I.
dc.date.accessioned2011-05-15T16:01:48Z
dc.date.available2011-05-15T16:01:48Z
dc.date.issued1998
dc.description.abstractCoal pyrolysis liquors are a major source of valuable phenolic compounds. In this study, the separation of m-cresol from neutral oils by means of liquid-liquid extraction is investigated. Liquid-liquid equilibria for the systems m-cresol + o-toluonitrile + hexane + water + tetraethylene glycol + undecane + dodecane and m-cresol + o-toluonitrile + hexane + water + tetraethylene glycol have been determined at 313.15 K in order to evaluate the suitability of tetraethylene glycol as a high-boiling solvent for the separation of m-cresol from neutral oils. The effect of parameters such as solvent ratios on the desired separation were investigated. These are illustrated on the basis of separation factors, percentage of feed o-toluonitrile remaining in the solvent phase, and percentage recovery of m-cresol. From the experimental results it was concluded that tetraethylene glycol is suitable for the proposed separation. The nonrandom two-liquid model fitted the experimental data satisfactorily. The model was used in the simulation of a multistage extraction column. m-Cresol recoveries of greater than 97% and m-cresol purity of greater than 99.5% were predicted.Coal pyrolysis liquors are a major source of valuable phenolic compounds. In this study, the separation of m-cresol from neutral oils by means of liquid-liquid extraction is investigated. Liquid-liquid equilibria for the systems m-cresol+o-toluonitrile+hexane+water+tetraethylene glycol+undecane+dodecane and m-cresol+o-toluonitrile+hexane+water+tetraethylene glycol have been determined at 313.15 K in order to evaluate the suitability of tetraethylene glycol as a high-boiling solvent for the separation of m-cresol from neutral oils. The effect of parameters such as solvent ratios on the desired separation were investigated. These are illustrated on the basis of separation factors, percentage of feed o-toluonitrile remaining in the solvent phase, and percentage recovery of m-cresol. From the experimental results it was concluded that tetraethylene glycol is suitable for the proposed separation. The nonrandom two-liquid model fitted the experimental data satisfactorily. The model was used in the simulation of a multistage extraction column. m-Cresol recoveries of greater than 97% and m-cresol purity of greater than 99.5% were predicted.
dc.description.versionArticle
dc.identifier.citationIndustrial and Engineering Chemistry Research
dc.identifier.citation37
dc.identifier.citation10
dc.identifier.issn8885885
dc.identifier.urihttp://hdl.handle.net/10019.1/12164
dc.subjectExtraction
dc.subjectGlycols
dc.subjectMathematical models
dc.subjectNitrogen compounds
dc.subjectOrganic solvents
dc.subjectParaffins
dc.subjectPhase equilibria
dc.subjectWater
dc.subjectCresol
dc.subjectDodecane
dc.subjectHexane
dc.subjectTetraethylene glycol
dc.subjectToluonitrile
dc.subjectUndecane
dc.subjectPhenols
dc.subjectliquid-liquid extraction
dc.subjectoil
dc.subjectseparation
dc.titleSeparation of m-cresol from neutral oils with liquid-liquid extraction
dc.typeArticle
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