tert-ブチル基の反応を利用するm,p-キシレンの分離

抄録

Separation of m, p-xylenes by selective trans-tert-butylation of m-xylene was studied. Mole fractions of each components in equilibrium in the reaction of m-xylene with tert-butylalkylbenzenes were determined and the equilibrium constants were obtained. They are, 4.34 for di-tert-butyltoluene, 0.29 for tert-butyltoluene, 0.48 for di-tert-butylbenzene and 0.11 for tert-butylbenzene. Di-tert-butyltoluene was found to be suitable for the separation of m, p-xylenes, and 98% pure p-xylene was obtained from mixed xylenes (m:p=2:1) by the three-stage transalkylation reaction.