POST-TREATMENT OF DEBORATED ZEOLITE MWW Russian patent published in 2017 - IPC C01B37/00 

FIELD: chemistry.

SUBSTANCE: method comprises (i) producing a zeolite material having a MWW framework structure, the framework structure of the zeolite material including X₂O₃ and YO₂, where Y is a tetravalent element and X is a trivalent element, and wherein the molar ratio X₂O₃:YO₂ exceeds 0.02:1, (ii) treating the produced zeolite material produced in step (i) with a liquid solvent system and thereby producing a zeolite material having a molar ratio X₂O₃:YO₂ amounting to not more than 0.02:1, partial allocating the zeolite material from a liquid solvent system, (iii) processing the zeolite material produced in step (ii) with a liquid aqueous system having a pH in a range of 5.5 to 8 and at a temperature below 75°C in a closed system at autogenous pressure, wherein the pH value of the aqueous system used in step (iii) is determined using a glass electrode for measuring pH.

EFFECT: effective processing a zeolite material, maintaining a constant degree of crystallinity or even increasing the degree of crystallinity.

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