Process for direct synthesis of sodium- and potassium-containing zeolite A
US4534947A · kind A · utility
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6Claims
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Key dates
| Filing date | May 4, 1984 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Zeolite A containing sodium and potassium ions, otherwise known as 3 .ANG. molecular sieve, may be prepared by a direct route when the aqueous aluminosilicate reaction mixture to be aged at elevated temperatures contains a mole ratio of Na.sub.2 O to Na.sub.2 O and K.sub.2 O which is greater by a factor of about 1.1 than the mole ratio of Na.sub.2 O to Na.sub.2 O and K.sub.2 O in the zeolite A product. Preferably, the reaction mixture also contains zeolitic nucleation seeds to promote crystallization of the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.