Granular functionalized silica, process for preparation thereof and use thereof

Patent metadata

Field	Value
Publication number	US-11458454-B2
Application number	US-201314410385-A
Country	US
Kind code	B2
Filing date	Jun 12, 2013
Priority date	Jun 28, 2012
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The present invention relates to granular functionalized silicas, wherein
the Hg pore volume (<4 μm) is more than 0.80 ml/g, d Q3=10% is more than 400 μm, d Q3=90% is less than 3000 μm, the ratio of d 50 without ultrasound exposure to d 50 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.

First claim

The invention claimed is:

1. A granular functionalized silica comprising:
a Hg pore volume (<4 μm) of more than 0.80 ml/g,
d Q3 =10% of more than 400 μm,
d Q3 =90% of less than 3000 μm,
a ratio of d 50 without ultrasound exposure to d 50 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.

2. The granular functionalized silica according to claim 1 , wherein the granular functionalized silica has a pH in a range from 5.0 to 11.0.

3. The granular functionalized silica according to claim 1 , wherein the granular functionalized silica has a ratio of d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 1.00 to 3.00, a measurement being effected on a fraction of particles of 400 to 500 μm.

4. The granular functionalized silica according to claim 1 , wherein the granular functionalized silica has the Hg pore volume (<4 μm) of 0.81 to 1.50 ml/g.

5. The granular functionalized silica according to claim 1 , wherein the additive comprises hardening agents or initiators, crosslinking agents, catalysts, active pharmaceutical ingredients and excipients, active cosmetic ingredients and excipients, cleansing and/or care compositions, flavourings, aromas and fragrances, animal feeds or animal feed additives, vitamins, minerals, foods or food additives, dyes and/or pigments, amino acids, oxidizing or bleaching agents, additives with microbicidal action, chemicals for agriculture and forestry, and/or concrete admixtures.

6. The granular functionalized silica according to claim 1 , wherein the additive is an enzyme.

Assignees

• Drexel Claus Peter
• Meyer Juergen
• Heindl Frank
• Evonik Degussa Gmbh
• Evonik Operations Gmbh

Inventors

• Drexel Claus-Peter
• Meyer Jürgen
• Heindl Frank

Classifications

• C09C1/3036 Primary

  Agglomeration, granulation, pelleting · CPC title

• C01B33/18

  Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof (preparation of aerogels by dehydrating gels C01B33/158; treatment to enhance the pigmenting or filling properties C09C) · CPC title

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title

• B01J20/28004

  Sorbent size or size distribution, e.g. particle size · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title