Inorganic anion exchangers and preparation thereof

Details Inorganic anion exchangers and preparation thereof Inorganic anion exchangers and preparation thereof

1985-06-24

1987-04-28

Wax, Robert A.

Compositions

Water-softening or purifying or scale-inhibiting agents

Water-insoluble base-exchange agent containing

106288B, 210683, 252175, 252184, 423593, 423600, B01J 2008

Patent

active

046612823

ABSTRACT:
A novel composition including an inorganic mixed metal oxides and partially hydrated oxides exhibiting anion exchange properties and a method of preparing the exchanger composition by coprecipitating hydroxides or hydrated oxides of a pair of metal elements such as aluminum and titanium, drying the mixed metal hydroxides or hydrated oxides, exchanging the anion of the mixed metal hydroxide or hydrated oxide for a nonvolatile anion such as a sulfate anion and calcining the mixed metal hydroxide or hydrated oxide to form a mixed metal oxide or partially hydrated oxide exhibiting anion exchange properties.

REFERENCES:
patent: 3002932 (1961-10-01), Duwell et al.
patent: 3879525 (1975-04-01), Miyata et al.
patent: 4145400 (1979-03-01), Adsetts
patent: 4326961 (1982-04-01), Lee et al.
Marino et al., "Thermal Stability of Magnesium, Aluminum Double Hydroxides Modified by Anionic Exchange," Thermochim. Acta 1982, 55(3), 377-383, (CA 97:44968).

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