FIELD: chemical industry; methods of synthesis of the molecular sieves.
SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the synthesis of the molecular sieves. The method of synthesis of the various molecular sieves is developed. The method provides for the preparation of the suspension of the seed crystals and attachments to it of the feeding substances (sources) of the skeleton components, for example, aluminum and silicon for the purpose to provide the growth of the seed crystals. The rate of addition of the feeding substances is regulated so, that it was just the same, as the rate of the crystals growth and at that there was no nucleation of the new crystals. The seed crystals can be the same or distinct from added feeding substances, that allows formation of the multilayered molecular sieve. When the crystals reach the desirable dimension, they are separated by means of the traditional methods. The invention allows to regulate the distribution of the size of the crystals.
EFFECT: the invention ensures control over the distribution of the size of the crystals.
10 cl, 11 ex, 2 tbl
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Authors
Dates
2006-09-27—Published
2004-07-19—Filed