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US 4,530,824 AGranted
Process for preparation of L type zeolites
AssigneeToyo Soda Manufacturing Co., Ltd.
InventorsJunji Arika, Keiji Itabashi, Yoshio Tamura
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Abstract
An L type zeolite of a high purity is prepared by crystallizing an amorphous sodium alminosilicate compound containing a silicon component in an amount of 67 to 91 wt. % as SiO.sub.2 on the anhydrous basis in an aqueous potassium hydroxide solution.
Claims5
A process for the preparation of L type zeolites, which comprises crystallizing an amorphous sodium aluminosilicate compound containing a silicon component in an amount of 67 to 91% by weight as SiO.sub.2 on the anhydrous basis in an aqueous potassium hydroxide solution,
- said amorphous sodium aluminosilicate compound having a particle size of 1 to 500 microns and being obtained by reacting an aqueous sodium silicate solution with an aqueous aluminum-containing solution while both the aqueous solutions are simultaneously and continuously supplied to a reaction vessel and the pH value of the reaction product is maintained in the range of from 5 to 9.
Dependencies are inferred from the claim text.