FIELD: chemistry, technological processes.
SUBSTANCE: in order to obtain microsherical zeolite of A type with high phase purity, solutions of sodium silicate and acidified aluminium sulfate are introduced in water kaolin suspension and powder-like zeolite NaA with crystal size 0.5-2.0 mcm in amount 5-10% wt, per total weight of kaolin and formed synthetic alumosilicate, is introduced. Hydrogen index (pH) of prepared suspension constitutes 9.5-10.5. Amount of kaolin in mixture - 75-85% wt. Amount of formed synthetic alumosilicate in mixture - 15-25% wt. Suspension is subjected to dispersion drying in smoke gases flow at temperature 350°C, tempered in "boiling" layer at temperature 600°C; tempered granules are crystallised in alkaline aluminate solution, washed with water from excess of alkali and dried.
EFFECT: invention allows to obtain zeolite with high adsoption and strength characteristics and with high phase purity.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF OBTAINING WEAR RESISTANT MICROSPHERICAL ZEOLITE OF A TYPE | 2007 |
|
RU2337064C1 |
| METHOD FOR PRODUCING NAA GRANULATED ZEOLITE ADSORBENT | 2017 |
|
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|
SU1640111A1 |
| METHOD OF PREPARING GRANULATED SYNTHETIC ZEOLITES | 2005 |
|
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| METHOD OF PRODUCING GRANULAR ZEOLITE MATERIAL NOT CONTAINING BINDER | 2009 |
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| METHOD OF PRODUCING HIGH PHASE PURITY ZEOLITE A GRANULATED WITHOUT BINDER | 2009 |
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| METHOD OF PRODUCING HIGH PHASE PURITY ZEOLITE ADSORBENT OF STRUCTURE A AND X, GRANULATED WITHOUT BINDER | 2009 |
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| METHOD OF PREPARING GRANULATED SYNTHETIC ZEOLITE-CONTAINING SYNTHETIC DETERGENT COMPONENT | 2002 |
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| METHOD OF OBTAINING GRANULATED WITHOUT BINDING AGENT NaY TYPE ZEOLITE WITH HIGH PHASE PURITY | 2014 |
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|
RU2412903C1 |
