Gallium zeolites.

摘要

Zeolites containing gallium in their crystalline framework structure are prepared by treating a zeolite material with a reagent capable of replacing a part of the aluminium of the framework structure of the zeolite material with the gallium. The method is especially applicable for the preparation of faujasitic materials of the formula $wherein:\; M\; is\; a\; charge\; balancing\; ion\; and\; n\; is\; the\; oxidation\; state\; thereof,\; x,\; y\; and\; z\; are\; the\; respective\; numbers\; of\; tetrahedra\; represented\; respectively\; by\; Al02,\; Ga02\; and\; Si02,\; x\; +\; y\; +\; z\; =\; 192,\; for\; a\; said\; faujasitic\; structure\; with\; no\; missing\; tetrahedra,\; x\; +\; y\; is\; from\; 0.1\; to\; 71\; inclusive,\; and\; y\; is\; from\; 0.01\; to\; 60\; inclusive.$