Process for the synthesis of a silica enriched crystalline aluminosilicate having the offretite structure, the aluminosilicate obtained and its use as a catalyst for the conversion of hydrocarbons
US5534239A · kind A · utility
27Cited by
5References
22Claims
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Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the synthesis of a silica-enriched crystalline aluminosilicate having the offretite structure from a nucleation gel A containing sources of silicon, aluminium, alkali metal ions, an organic structuring agent and water and a growth gel B containing sources of silicon, aluminium, alkali metal ions and water. The crystals formed are calcined, the ions are replaced by protons and the crystals are subjected to a hydrothermal treatment followed by a treatment with a strong mineral acid. The aluminosilicate formed has a good selectivity in acid catalysis reactions and is characterized by its good stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.