THE DISTRIBUTION AND DISSOCIATION EQUILIBRIA OF PHASE-TRANSFER CATALYST TRICAPRYLMETHYLAMMONIUM CHLORIDE AND ITS AQUEOUS-PHASE MASS-TRANSFER

被引:22
作者
ASAI, S
NAKAMURA, H
FURUICHI, Y
机构
[1] Department Of Chemical Engineering, University Of Osaka Prefecture
关键词
MASS TRANSFER; PHASE-TRANSFER CATALYST; ALIQUAT-336; DISTRIBUTION EQUILIBRIUM; DISSOCIATION EQUILIBRIUM; DIFFUSIVITY; EXTRACTION; QUATERNARY AMMONIUM SALT;
D O I
10.1252/jcej.24.653
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The distribution and dissociation equilibria of a representative phase-transfer catalyst, tricaprylmethylammonium chloride (Aliquat 336; Q+ Cl-), were measured for the systems of n-butyl acetate-water, toluene-water, n-butyl acetate-aqueous NaCl solutions and toluene-aqueous NaOH solutions. The evaluated distribution coefficients of Q+ Cl- and the OH--substituted derivative (Q+ OH-) were correlated as a function of the ionic concentrations in the aqueous phases. The dissociation constants of Q+ Cl- and Q+ OH- in the aqueous phase could be regarded as being identical. The diffusivities of Q+ Cl- in water and in n-butyl acetate, and the ionic diffusivity of Q+ in the aqueous phase were measured. The aqueous-phase mass transfer of Q+ Cl- could be quantitatively explained as that with an instantaneous reversible dissociation reaction.
引用
收藏
页码:653 / 658
页数:6
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