6Yamamura M, Chaki K, Wakatsuki T. Synthesis of ZSM - 5 zeolite with small crystal size and its catalytic performance for ethylene oligomerization [ J ]. Zeolites, 1994,14(8) :643 -649.
7Chen N Y, Kaeding W W, Dwyer F G. Para - directed aromatic reaction over shap - seletive molecular sieve zeolite catalysts [ J ]. J Am Chem Soc, 1979,101 (22) : 6783 - 6786.
8Beschmann K, Riekert L. Isomerization of xylene and methylation of toluene on zeolite H - ZSM - 5. Compound kinetics and selectivity [ J ]. J Catal, 1993,141 ( 2 ) : 548 - 565.
9Kaeding W W, Chu C, Young L B, et al. Selective alkylation of toluene with methanol to produce para - xylene[J]. J Catal,1981,67(1) :159 - 163.
10Halgeri A B, Das J. Recent advances in selectivation of zeolites for para - disubstiuted aromatics [ J ]. Catalysis Today ,2002,73:65 - 73.
