Silica granules for thermal treatment

US12330951B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Mareike GIESSELER · Maintal, DE
• Rainer Golchert · Darmstadt, DE
• Nina MÜHLIG · Schaafheim, DE
• Alexander Lygin · Griesheim, DE
• Wolfgang AUL · Neuses, DE
• Tobias RENGER · Großkrotzenburg, DE
• Christoph Tontrup · Alzenau, DE

Key dates

• Filing date: May 14, 2021
• Grant date: Jun 17, 2025
• Expiry date: Mar 22, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/57
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention provides fumed silica granules having a BET surface area of 20 m2/g to 500 m2/g; a number average particle size d50 of 350 μm to 2000 μm; a span (d90−d10)/d50 of particle size distribution of 0.8-3.0; a bulk density of more than 0.35 g/mL; a pore volume for pores >4 nm of not more than 1.5 cm3/g, process for its preparation and use thereof as a catalyst carrier, a carrier for liquid substances, in cosmetic applications, for thermal insulation, as pharmaceutical excipient, in producing thermally treated silica granules, as an abrasive, as a component of a silicone rubber.