Process for producing a crystalline silico-aluminate of type...

Details Process for producing a crystalline silico-aluminate of type... Process for producing a crystalline silico-aluminate of type...

C - Chemistry, Metallurgy

01

F

252/15

C01F 7/02 (2006.01)

Patent

CA 1153749

ABSTRACT A novel process is disclosed for producing a silico-aluminate with a high capacity for absorption of water and an SiO2/Al2O3 molar ratio higher than 1.85, by mixing an aqueous solution of alkali-metal aluminate and a solution of alkali-metal silicate at a temperature which is sufficiently low to form a homogenous liquid reaction mixture and for a period of time such as to avoid the formation of gel during mixing. The process is characterised in that the SiO2/Al2O3 molar ratio in the reaction medium is at least equal to 1.85. The process is used in particular for the preparation of zeolite of type 4A.

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