Process for direct oxidation of propylene to propylene oxide and large particle size titanium silicalite catalysts for use therein
US6960671B2 · kind B2 · utility
6Cited by
12References
18Claims
0Family size
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Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Oct 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Large crystals of titanium silicalite or intergrowths of intergrown smaller crystals, having a mean particle size greater than 2 μm, have been found catalytically effective at commercially reasonable rates for the epoxidation of olefins in the presence of hydrogen peroxide. Crystals synthesized with a silica source having a low sodium content exhibit high levels of production and selectivity. The crystals have a low attrition rate and are easily filterable from a product stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.