Method of making seed solution useful in zeolite catalyst manufacture
AssigneeEngelhard Corporation
InventorCarol A. Altomare
Life of this patent
Estimating the term…
Abstract
The useful storage life of a clear solution of seeds used to initiate the crystallization of zeolite in porous microspheres of calcined clay is increased by adding sodium silicate solution to a matured seed solution.
Claims10
The method for increasing the storage life of a clear solution of amorphous sodium aluminosilicate seeds prepared by mixing solutions of sodium silicate, sodium aluminate and sodium hydroxide, used in proportion such as to form a clear solution, heating said solution to mature the seeds in said solution, and diluting the clear seed solution by adding an effective amount of alkaline sodium silicate solution.
The method for clarifying a solution of sodium aluminosilicate seeds which was clear when the seeds matured but has become cloudy or gelled during aging at about ambient or elevated temperature which comprises adding an effective amount of alkaline sodium silicate solution to a cloudy or gelled solution, optionally heating until the solution becomes clear, and then allowing the solution to cool and age.
Dependencies are inferred from the claim text.