Crystalline zeolite composition (ECR-5) having a cancrinite-like structure and process for its preparation
US4717560A · kind A · utility
15Cited by
13References
13Claims
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Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/2892
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A crystalline zeolite may be prepared which has a composition, in terms of mole ratios of oxides, in the range: EQU 1.0 to 1.3 Na.sub.2 O:Al.sub.2 O.sub.3 :2.1 to 8.0 SiO.sub.2 and having a cancrinite-like structure in which the twelveing channel thereof is not blocked by, for example, salt molecules. The preferred compositions are of the formula: EQU 1.1 to 1.3 Na.sub.2 O:Al.sub.2 O.sub.3 :2.4 to 3.1 SiO.sub.2 This zeolite may be prepared from crystallization of an aged reaction mixture containing aqueous ammonia, a source of silica, a source of alumina and sodium hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.