Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1981-11-03
1991-02-19
Davis, Curtis R.
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423329, 502 77, C01B 3334
Patent
active
049942514
ABSTRACT:
As synthesized by previous methods, ZSM-5 or ZSM-11 zeolites are crystallized in the presence of substantial amounts of a nitrogen-containing compound. When synthesized in this way, they contain an organic ammonium cation as well as a metal cation such as sodium. To obtain a more active form, the sodium ion must be exchanged out. Such exchange, especially with ZSM-5 and ZSM-11, is difficult unless there is calcination of the zeolite to remove the obstructing organo compounds. By making these zeolites in the presence of (1) seeds of the desired zeolite, (2) mixtures of them with ammonium hydroxide and/or alcohol, (3) the alcohol per se or (4) mixtures of the alcohol with ammonium hydroxide, a product substantially deficient in organic ammonium cation is obtained. These products can be exchanged directly without any calcination.
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Plank Charles J.
Rosinski Edward J.
Rubin Mae K.
Breneman R. Bruce
Davis Curtis R.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
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