Iy. Ponomarenko et Lm. Koval, EFFECT OF MODIFICATION OF ZEOLITE CATALYSTS ON THEIR ACIDITY AND CATALYTIC ACTIVITY IN THE VAPOR-PHASE ALKYLATION OF PHENOL BY METHANOL, Journal of applied chemistry of the USSR, 65(10), 1992, pp. 1888-1892
A study has been made of a series of zeolite catalysts modified with l
anthanum and magnesium oxides, the additives being introduced into the
zeolite by different methods. It has been established that the most a
ctive catalysts are those modified by ion exchange. It is concluded th
at the alkylation of phenol by methanol proceeds mainly inside the zeo
lite pores and involves at least two types of acid centers.