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Kinetics and extraction of phenol in phase‐transfer catalyzed reaction
Author(s) -
Wu HoShing,
Liu ChienBang
Publication year - 1998
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450760412
Subject(s) - chemistry , mass transfer , catalysis , phenol , mass transfer coefficient , dichloromethane , extraction (chemistry) , phase (matter) , bromide , aqueous two phase system , reaction rate , product distribution , chemical kinetics , base (topology) , aqueous solution , kinetics , inorganic chemistry , chromatography , organic chemistry , solvent , mathematical analysis , physics , mathematics , quantum mechanics
Under two‐phase conditions, the feasibility of extracting/removing phenol from aqueous alkaline medium via reaction with allyl bromide dissolved in dichloromethane was investigated using phase‐transfer catalysts in a stirred cell. The effects of the concentrations of base, reactant and catalyst, and temperature were also evaluated to obtain the optimum reaction conditions. According to these results, the extractive efficiency of phenolic substances varied strongly with increasing base concentration. The specific extraction rate, diffusivity, mass transfer coefficient and distribution coefficient of an intermediate product were determined to explain the reaction mechanism by the proposed theoretical model. During reaction, the concentration of the intermediate product in the organic phase was also measured, and a simulation method was used to examine the mass transfer behavior of the intermediate product in the liquid‐liquid system.