Evonik Degussa Gmbh

Evonik Operations Gmbh

Tobias Renger

Stipan Katusic

Alexander Lygin

Rainer Golchert

Peter Kress

Frank Menzel

Harald Alff

Christoph Tontrup

Mareike Giesseler

Björn Lazar

Armin Wiegand

Wolfgang Aul

Nina Mühlig

Bettina Gerharz-Katle

The invention provides fumed silica granules having a BET surface area of 20 m/g to 500 m/g; a number average particle size dof 350 μm to 2000 μm; a span (d−d)/dof 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 cm/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.

Silica granules for thermal treatment

Process for producing metal oxide powders by means of flame spray pyrolysis, in which an aerosol comprising a metal compound is introduced into a flame in a reactor and reacted therein, and the metal oxide powder obtained is separated from gaseous substances, wherein a) the flame is formed by the ignition of an oxygen-containing gas (1) with a fuel gas, b) the aerosol is obtained by joint atomization of a solution containing a metal compound and an atomization gas by means of one or more nozzles and c) the ratio of the spray area to the cross-sectional reactor area is at least 0.2.

Process for producing metal oxide powders by means of flame spray pyrolysis

Growing community of inventors

Grosskrotzenburg, Germany

Tobias Renger