METHOD OF IMPREGNATION BY A METAL OF A MOLECULAR SIEVE EXTRUDATE WITH A CEMENTING MATERIAL Russian patent published in 2005 - IPC

FIELD: powder metallurgy; method of impregnation by a metal(of VIII group) of a molecular sieve extrudate with cementing material with the help of ion exchange with an aqueous solution of metal salt of VIII group.

SUBSTANCE: the invention presents a method of impregnation by metal of VIII group of an extrudate of a molecular sieve with cementing material, in which the cementing material represents a refractory oxidic material with a low acidity, practically free of aluminum oxide, using: a) impregnation of porous volume of an extrudate of a molecular sieve with cementing material with an aqueous solution of nitrate of the corresponding metal of VIII group with pH from 3.5 up to 7, in which the molar ratio between cations of a metal of VIII group in a solution and a number of centers of the adsorption available in the extrudate, is equal to or exceeds 1; b) drying of the produced at the stage a) extrudate of the molecular sieve with the cementing material. The technical result is good distribution of the metal and a short period of drying.

EFFECT: the invention ensures good distribution of the metal and a short period of drying.

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