METHOD OF PREPARING TYPE A ZEOLITE Russian patent published in 1999 - IPC

Abstract RU 2141451 C1

FIELD: chemical, petroleum, oil refining and gas industries. SUBSTANCE: method comprises calcining kaoline having 53-58 wt % of SiO₂ content and 42-47 wt % of Al₂O₃ content, at temperature of not higher than 850 C for at least 40 minutes, mixing it with alumosilicohydrogel which is mixture of solutions of sodium silicates and sodium aluminates, granulation and drying of granules at least three-stage hydrothermal crystallization of granules in alkaline aluminate solution by changing parameters of aluminate solution temperature and granule maintenance time in each crystallization time, washing the zeolite, and squeezing it for 0.5-1.5 h, washing it repeatedly, drying it at temperature of 130-140 C. EFFECT: improved quality of the zeolite. 4 cl

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RU 2 141 451 C1

Authors

Belova O.N.

Kopein O.R.

Krylov V.O.

Tsurikov N.K.

Panov D.A.

Dates

1999-11-20—Published

1998-12-29—Filed