Method of ion exchange zeolites

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing

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252455Z, 423328, C01B 3320, C01B 3328

Patent

active

043460674

ABSTRACT:
An improved ion exchange method is provided in which an alkali metal cation-containing crystalline metallosilicate zeolite is contacted with an ion exchange medium comprising an ammonium ion, urea and water. The resulting mixture is heated to a temperature sufficient to evaporate the water and solidify the remaining mixture. An ammonium exchanged zeolite having a decreased content of alkali metal is recovered.

REFERENCES:
patent: 3374057 (1968-03-01), McDaniel et al.
patent: 3383169 (1968-05-01), Young
patent: 3402996 (1968-09-01), Maher et al.
patent: 3875290 (1975-04-01), Gring
patent: 3929672 (1975-12-01), Ward
patent: 3948760 (1976-04-01), Gring

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