Process for preparing crystalline silicas

Details Process for preparing crystalline silicas Process for preparing crystalline silicas

C - Chemistry, Metallurgy

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C01B 33/18 (2006.01) B01J 29/035 (2006.01) B01J 29/40 (2006.01) B01J 29/70 (2006.01) C01B 37/02 (2006.01) C07C 2/66 (2006.01)

Patent

CA 1251618

PROCESS FOR PREPARING CRYSTALLINE SILICAS 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°C a crystalline silica of the silicalite type having a silica to alumina atomic ratio of at least 80.

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