Method of producing rod-shaped ZSM-5 zeolite

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing

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423328, 502 60, 502 77, C01B 3328

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047972670

ABSTRACT:
This disclosure is concerned with the crystallization of ZSM-5 zeolites and, more particularly, is concerned with the preparation of high silica ZSM-5 zeolites having a silica-to-alumina ratio of greater than 70, up to and approaching infinity, by control of the pH so as to obtain rod-shaped crystals.

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A. Nastro and L. B. Sand "Growth of Larger Crystals of ZSM-5 in the System 4(TPA).sub.2 O-38(NH.sub.4).sub.2 O-x(Li,Na,K).sub.2 O-Al.sub.2 O.sub.3 -59SiO.sub.2 -750H.sub.2 O, " Zeolites 1983 vol. 3, Jan. pp. 57-62.

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