Process for synthesizing a zeolite catalyst on a pH controlled b

Details Process for synthesizing a zeolite catalyst on a pH controlled b Process for synthesizing a zeolite catalyst on a pH controlled b

1984-12-21

1988-08-16

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423328, 502 60, 502 77, C01B 3328

Patent

active

047643560

ABSTRACT:
A process for preparing a zeolite, e.g. ZSM-5, under controlled conditions of initial pH adjustment with an acid, SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio, and in the presence of sodium cations, is disclosed, as well as a process for using the same to synthesize olefins from methanol and/or dimethyl ether.

REFERENCES:
patent: 4139600 (1979-02-01), Rollmann et al.
patent: 4296083 (1981-10-01), Rollmann
patent: 4420467 (1983-12-01), Whittam
J. L. Casci et al, "Use of pH Measurements to Monitor Zeolite Crystallization", Zeolites vol. 3, No. 3, Jul. 1983.
Zelimir Gabelica, Eric G. Derouane and Niels Blom, Synthesis and Characterization of Pentasil Type Zeolites II. Structure-Directing Effect of the Organic Base or Cation, Applied Catalysis, (1983) Elesvier Scientific Publishing Co. Amsterdan, The Netherlands, pp. 109-117.
Hiromi Nakamoto and Hiroshi Takahashi, "Crystallization of Zeolite ZSM-5 From Single Cation System", Chemistry Letters, pp. 1739-1742, 1981.
Kuei-Jung Chao, Tseng Chang Tasi and Mei-Shu Chen, "Kinetic Studies on the Formation of Zeolite ZSM-5", J. Chem. Soc., Faraday Trans. 1, 1981, 77, 547-555.
Mand Ghamami and L. B. Sand, "Synthesis and Crystal Growth of Zeolite (NH.sub.4 TPA)", Zeolites 1983, vol. 3, Apr.
E. Kikuchi, R. Hamana, S. Hamanaka, and Y. Morita, "Preparation of Zeolite Catalyst for Synthesis of Lower Olefins from Methanol", J. Japan Petrol. Inst., 24 (5) 275-280 (1981).
Zelimir Gabelica, Niels Blom and Eric G. Derouane, "Synthesis and Characterization of ZSM-5 Type Zeolites, Applied Catalysis, 5 (1983) 227-248, 1983 Elsvier Scientific Publishing Company.

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