Preparation of modifying and using aluminosilicates

Details Preparation of modifying and using aluminosilicates Preparation of modifying and using aluminosilicates

1991-10-03

1992-11-10

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

502 80, B01J 2012, B01J 2016

Patent

active

051622769

ABSTRACT:
Mineral aluminosilicates enhanced as ion-exchange media for separating diverse ionic materials are provided by dry heating. A hydrated mineral alumino-silicate is irreversibly dehydrated in part, to improve the ratio of its affinity for preferred ions, relative to non-preferred ions, even though doing so reduces its affinity for both types of ions. Such dehydration is accomplished by heating the aluminosilicate until a temperature is reached at which its affinity for non-preferred cations is reduced enough that the ratio of its affinity for preferred ions to its affinity for non-preferred ions is greatly increased. Such aluminosilicates may be zeolites, such as clinoptilolite, or layered clays, such as vermiculite or smectite. 850.degree. C. is an example of such temperature.

REFERENCES:
patent: 5082813 (1992-01-01), Taborsky

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