シリケート被覆ＭＦＩ型ゼオライトとその製造方法およびそれを用いたｐ−キシレンの製造方法

摘要

A silicate-coated MFI-type zeolite is obtained by coating an MFI-type zeolite with a silicate, and a peak area ratio b/a of a peak b at 2&thetas;=8.4 to 9.7° to a peak a at 2&thetas;=7.0 to 8.4° in an X-ray diffraction spectrum is 1 or more, and a pKa value measured by a Hammett indicator is +3.3 or more.