Process for preparation of faujasite type zeolite

Details Process for preparation of faujasite type zeolite Process for preparation of faujasite type zeolite

C - Chemistry, Metallurgy

01

B

252/15

C01B 39/20 (2006.01)

Patent

CA 1249989

PROCESS FOR PREPARATION OF FAUJASITE TYPE ZEOLITE ABSTRACT OF THE DISCLOSURE A faujasite type zeolite of a high purity and a desired silica/alumina ratio is prepared by crystallizing at an elevated temperature a reaction mixture comprising a silica source, an alumina source, and an alkali metal source, wherein a transparent faujasite germ solution obtained by mixing and aging aqueous alkali metal silicate solution, an aqueous alkali metal aluminate solution and an aqueous alkali metal hydroxide solution is made present in the reaction mixture. The faujasite germ solution has an oxide molar composition represented by the following molar ratios: SiO2/Al2O3 = 8 to 14, M2O/Al2O3 = 7 to 30, and H2O/M2O = 10 to 14, wherein M represents an alkali metal. The amount of the faujasite germ solution is 1 to 30 wt.% as Al2O3 based-on the faujasite type zeolite.

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