| 摘要 |
Alkylation of aromatic hydrocarbons is effected in the presence of a catalyst comprising a porous crystalline Mg silicate modified with 0.25-30 wt.% P. The P-modified Mg silicates are new. The Mg silicate is of formula (M2/nO)p(MgO)x(R2O3)4(SiO2)z, where M is at least one n-valent cation, esp. H, alkali metal or rare earth metal; R is at least one trivalent element, esp. Al, Fe, Cr, B or Ga; p, x and z are positive nos. such that x/z is greater than zero, y/z is greater than or equal to zero and p/n is greater than y; and y is a positive no. or zero. The P is introduced by impregnation with (NH4)2HPO4 followed by calcination in the presence of O2 at at least 300 deg.C. The P content is 1-6 wt.%.
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