Process for the organotemplate-free synthetic production of a zeolitic material using recycled mother liquor

摘要

The present invention relates to an organotemplate-free synthetic process for the production of a zeolitic material comprising YO2 and X2O3, wherein said process comprises the steps of
(1) preparing a mixture comprising seed crystals, one or more sources for YO2, one or more sources for X2O3, and one or more solvents;(2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material comprising YO2 and X2O3 as a crystallization product;

wherein Y is a tetravalent element, and X is a trivalent element, and

wherein at least a portion of the mother liquor obtained in step (2) is recycled to step (1) as a source for YO2, optionally after concentration of the mother liquor.

主权项

1. An organotemplate-free synthetic process for the production of a zeolitic material comprising YO2 and X2O3, wherein said process comprises the steps of
(1) preparing a mixture comprising seed crystals, one or more sources for YO2, one or more sources for X2O3, and one or more solvents; (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material comprising YO2 and X2O3 as a crystallization product;wherein Y is a tetravalent element, and X is a trivalent element,wherein at least a portion of the mother liquor obtained in step (2) is recycled to step (1) as a source for YO2, optionally after concentration of the mother liquor, andwherein the ratio of the Y:X molar ratio of the mother liquor obtained in step (2) to the Y:X molar ratio of the one or more sources for YO2 and the one or more sources for X2O3 contained in the mixture obtained in step (1), which was crystallized in step (2), is 2 or greater.