Adsorption characteristics of cresols with eluent composition in adsorption chromatography

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399108049908· OSTI ID:5468413

Moon, J K; Lee, W K ^[1]

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1. Advanced Inst. of Science and Technology, Seoul (Korea)

Adsorption characteristics of cresol isomers in adsorption chromatography were investigated in a system where the binary eluent containing ethyl acetate as a modifier in n-hexane was used. The method of moments was used to estimate the equilibrium constant and the rate parameters. The agreement between the experimental and theoretical results calculated by the orthogonal collocation method was excellent. the equilibrium constant and rate parameters for each cresol were empirically correlated with eluent composition. As the eluent composition increased, the retention time and the front of the response curve became faster and sharper, respectively. By using the modifier in a weak solvent, mixtures of o-/m-cresols and o-/p-cresols were easily separated whereas that of m-/p-cresols was not. The values on the scale of axial eddy dispersion were much larger than those of the gas system. For o-cresol, these values diminished with increasing eluent composition, while for m-and p-cresols the trend was reversed. For all systems, both intraparticle mass transfer and axial dispersion were dominant.

• OSTI ID: 5468413
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 26:5; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ACETATES
ADDITIVES
ADSORBENTS
ADSORPTION
ALKANES
AROMATICS
CALCULATION METHODS
CARBOXYLIC ACID SALTS
CHEMICAL ACTIVATION
CHROMATOGRAPHY
CRESOLS
DESIGN
EQUATIONS
EQUILIBRIUM
FLOW RATE
HEXANE
HYDROCARBONS
HYDROXY COMPOUNDS
ISOMERS
MASS TRANSFER
ORGANIC COMPOUNDS
PHENOLS
SEPARATION PROCESSES
SORPTION