Method for purifying zeolitic material

Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs

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502 62, 423328, B01J 2906, C10B 3328

Patent

active

047030259

ABSTRACT:
A method for purifying zeolitic materials comprising a plurality of solid crystalline phases is disclosed which utilizes the variation in solubility between the phase components comprising the materials. Impure zeolite is contacted with a caustic solution under conditions which dissolve at least one of the phases and the resulting zeolitic material is filtered and washed to produce a purified product.

REFERENCES:
patent: 4134965 (1979-01-01), Rein et al.
patent: 4260495 (1981-04-01), Bennoit et al.
patent: 4497786 (1985-02-01), Chu et al.
patent: 4524055 (1985-06-01), Onodera et al.

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