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US 7,442,727 B2Granted
Pyrogenically prepared, surface modified aluminum oxide
AssigneeDegussa AG
InventorsJuergen Meyer, Manfred Ettlinger
Life of this patent
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Abstract
Pyrogenically prepared, surface modified aluminum oxide, having the following physical chemical properties: Surface area [m2/g] 50 to 150 Tamped density [g/L] 25 to 130 Drying loss [%] less than 5 Loss on ignition [%] 0.1 to 15 C content [%] 0.1 to 15 pH value 3 to 9 is prepared by treating pyrogenically prepared aluminum oxide with a surface modifying agent.
Claims6
A product consisting of a pyrogenically prepared, surface modified aluminum oxide modified by a surface modifying agent selected from the group consisting of octyltrimethoxysilane and octyltriethoxysilane, and having the following physical chemical properties:
- Surface area [m2/g]
- 50 to 150
- Tamped density [g/L]
- 25 to 130
- Drying loss [%]
- less than 5
- Loss on ignition [%]
- 0.1 to 15
- C content [%]
- 0.1 to 15
- pH value
- 3 to 9.
9 more elements
Dependencies are inferred from the claim text.