Method for preparing NaY molecular sieve with high aluminum-silicon ratio
The invention relates to a method for preparing a NaY molecular sieve with a high aluminum-silicon ratio, which comprises the following steps of: mixing a silicon source, an aluminum source and deionized water, uniformly mixing two guide agents in different molar ratios, water glass, acidic aluminum...
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Main Authors | , , , , , , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
28.09.2011
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a method for preparing a NaY molecular sieve with a high aluminum-silicon ratio, which comprises the following steps of: mixing a silicon source, an aluminum source and deionized water, uniformly mixing two guide agents in different molar ratios, water glass, acidic aluminum salt and sodium aluminate solution in a molar ratio of gel materials to prepare two gels, and crystallizing respectively, wherein the molar ratio of the gel materials is (1.0-6.5)Na2O:Al2O3:(5.0-18)SiO2:(100-280)H2O, and Al2O3 in the guide agents accounts for 0.01 to 15 percent of the total weightof Al2O3; uniformly mixing the two gels in a mass ratio of 1:(0.1-10) to prepare a mixed gel; and crystallizing the prepared mixed gel at the temperature of between 80 and 120 DEG C for 2 to 50 hoursto prepare the NaY molecular sieve. Compared with the prior art, the method has the advantages that: the NaY molecular sieve with the high aluminum-silicon ratio can be prepared in shorter time underthe condition of the same f |
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Bibliography: | Application Number: CN20101134759 |