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US 11,458,454 B2Granted
Granular functionalized silica, process for preparation thereof and use thereof
AssigneeEvonik Operations GmbH
InventorsClaus-Peter Drexel, Jürgen Meyer, Frank Heindl
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Abstract
The present invention relates to granular functionalized silicas, wherein the Hg pore volume (<4 μm) is more than 0.80 ml/g, dQ3=10% is more than 400 μm, dQ3=90% is less than 3000 μm, the ratio of d50 without ultrasound exposure to d50 after 3 min of ultrasound exposure is <4.00 and the carbon content is 1.0-15.0% by weight. The inventive granular functionalized silicas can be used as a support material, especially as a support for enzymes.
Claims6
A granular functionalized silica comprising:
- a Hg pore volume (<4 μm) of more than 0.80 ml/g,
- dQ3=10% of more than 400 μm,
- dQ3=90% of less than 3000 μm,
- a ratio of d50 without ultrasound exposure to d50 after 3 min of ultrasound exposure is <4.00, a measurement being effected on a fraction of particles of 400 to 500 μm, and
- a carbon content of 1.0-15.0% by weight;
- wherein the granular functionalized silica is a precipitated silica, contains a surface modifier that is 3-aminopropyltriethoxysilane on a surface of the granular functionalized silica and contains an additive,
- wherein the additive is bound to the granular functionalized silica, and
- wherein the additive is released from the granular functionalized silica at least 10 times less with the surface modifier that is 3-aminopropyltriethoxysilane compared to the granular functionalized silica without the surface modifier.
5 more elements
Dependencies are inferred from the claim text.