US 12,330,951 B2
Silica granules for thermal treatment
Mareike Giesseler, Maintal (DE); Rainer Golchert, Dieburg (DE); Nina Mühlig, Schaafheim (DE); Alexander Lygin, Griesheim (DE); Wolfgang Aul, Freigericht (DE); Tobias Renger, Grosskrotzenburg (DE); and Christoph Tontrup, Alzenau (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 17/927,040
Filed by EVONIK OPERATIONS GMBH, Essen (DE)
PCT Filed May 14, 2021, PCT No. PCT/EP2021/062797
§ 371(c)(1), (2) Date Nov. 22, 2022,
PCT Pub. No. WO2021/239475, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 20176242 (EP), filed on May 25, 2020.
Prior Publication US 2023/0286814 A1, Sep. 14, 2023
Int. Cl. C01B 33/18 (2006.01)
CPC C01B 33/18 (2013.01) [C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/10 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/82 (2013.01)] 20 Claims
 
1. Fumed silica granules comprising:
a BET surface area of 20 m2/g to 500 m2/g;
a number average particle size d50 of 350 μm to 2000 μm, as determined by laser diffraction;
a span (d90−d10)/d50 of particle size distribution of 0.8-3.0, as determined by laser diffraction;
a bulk density of more than 0.35 g/mL, as determined by mercury intrusion;
a pore volume for pores >4 nm of not more than 1.5 cm3/g, as determined by mercury intrusion.