Process for producing Y-type zeolite

Details Process for producing Y-type zeolite Process for producing Y-type zeolite

1981-09-14

1983-03-08

Meros, Edward J.

Chemistry of inorganic compounds

Carbon or compound thereof

Oxygen containing

423328, C01B 3328

Patent

active

043761062

ABSTRACT:
A Y-type zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least about 4 is produced by the following process. In the first step of the process, an aqueous alkali silicate solution and an aqueous alkali aluminate solution are mixed together in the presence of an alkali in an amount such that the ratio of M.sub.2 O(M: an alkali metal)/Al.sub.2 O.sub.3, present in the mixed solution, is at least about 5 by mole, followed by forming a gel in the mixed solution and, then, separating the gel therefrom. In the second step, the separated gel is incorporated in an aqueous alkali silicate solution or an aqueous alkali silicate-alkali mixed solution to obtain a slurry and, then, a Y-type zeolite crystal is formed in the slurry.

REFERENCES:
patent: 3433589 (1969-03-01), Ciric
patent: 3481699 (1969-12-01), Domine et al.
patent: 3492090 (1970-01-01), Jenkins
patent: 3510258 (1970-05-01), Hindin
patent: 3574538 (1971-04-01), McDaniel et al.
patent: 3767771 (1973-10-01), Guth et al.
patent: 4160011 (1979-07-01), Estes et al.

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