| 摘要 |
A catalytic process is provided for the selective production of para-xylene by contacting toluene, under methylation conditions, with a methylating agent in the presence of a catalyst comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and which has combined therewith magnesium in an amount of at least about 0.5 percent by weight.
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