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US 5,011,667 AGranted
Self-bound sodium chabazite aggregates and methods for preparation thereof
AssigneeEngelhard Corporation
InventorsSteven M. Kuznicki, John R. Whyte, Jr.
Life of this patent
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Abstract
A process for making self-bound monolithic bodies of chabazite by mixing finely divided chabazite and a sodium aluminosilicate gel into monolithic bodies, the gel having a molar ratio of silica to aluminum between 1.0 and 1.5 and a molar ratio of sodium to silica from 0.35 to 0.55, and heating the monolithic bodies in the presence of water to convert the gel to additional chabazite.
Claims3
A process for making monolithic bodies of finely divided particles of naturally-occurring chabazite bonded with crystals of synthetic chabazite including the steps of:
- (a) forming a mixture comprising finely divided chabazite ore and a sodium aluminum silicate gel into monolithic bodies, the get having a composition such that the molar ratio of silicon to aluminum is between 1.0 and 1.5 and the ratio of sodium to silicon ranges from 0.35 to 0.55;
- (b) recovering the resulting monolithic bodies;
- (c) and heating said bodies in the presence of water to a temperature above 80.degree. C. for a period of time of sufficient duration to convert said gel to additional chabazite, thereby producing monolithic bodies of finely divided particles of naturally-occurring chabazite bonded with crystals of synthetic chabazite.
Dependencies are inferred from the claim text.