Process for preparing crystalline silicas

Details Process for preparing crystalline silicas Process for preparing crystalline silicas

1983-12-19

1988-09-20

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423326, 502 77, C01B 3320

Patent

active

047724560

ABSTRACT:
Disclosed is a process for preparing crystalline silicas having the monoclinic symmetry which comprises the step of calcining in air for at least 3 hours at a temperature of at least 500.degree. C. a crystalline silica of the silicalite type having a silica to alumina atomic ratio of at least 80.

REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 4061724 (1977-12-01), Grose et al.
Wu et al., "Journal of Physical Chemistry", vol. 83, No. 21, 1979, pp. 2777-2781.

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