Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1980-07-15
1982-07-27
Meros, Edward J.
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
252455Z, C01B 3328
Patent
active
043417485
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.
REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 4175114 (1979-11-01), Plank et al.
Plank Charles J.
Rosinski Edward J.
Rubin Mae K.
Gilman Michael G.
Huggett Charles A.
Meros Edward J.
Mobil Oil Corporation
Speciale Charles J.
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