Evonik Degussa Gmbh

Evonik Operations Gmbh

Center for Abrasives and Refractories Research & Development C.a.r.r.d. Gmbh

Evonik Carbon Black Gmbh

Technische Universität Bergakademie Freiberg—institut Für Keremik, Glas-und Baustofftechnik

Orion Engineered Carbons Gmbh

Christoph Tontrup

Wolfgang Lortz

Christoph Batz-Sohn

Alexander Lygin

Gabriele Perlet

Klaus Bergemann

Rainer Golchert

Christos Georgios Aneziris

Manfred Dannehl

Tadeusz Von Rymon Lipinski

Mareike Giesseler

Ansgar Oelmann

Uwe Klippel

Tobias Renger

Danilo Frulli

Nina Mühlig

Wolfgang Aul

Britta Schwartze

Erich Schmidt-Kluge

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

Slurry which contains a) from (50) to (80)% by weight of refractory particles having an average particle size of from (0.5) m to (150) m, b) from (5) to (35)% by weight of aluminum oxide particles having an average particle diameter of less than (300) nm and c) from (5) to (35)% by weight of water and d) a pH of from (5) to (12). Process for producing the slurry using a dispersion, and also the dispersion itself. Process for producing a casting mold, and also the casting mold itself.

Dispersion, slurry and process for producing a casting mould for precision casting using the slurry

Mix which comprises a) one or more very finely divided silicon dioxide powders having an average particle diameter of from 2 to 100 nm and a BET surface area of at least 30 m/g, b) one or more particulate components selected from the group consisting of oxides, carbides and nitrides, in each case having an average particle diameter of from &#x3e;0.5 &#x3bc;m to 30 mm, c) one or more synthetic resins as binders and d) one or more metallic antioxidants having an average particle diameter of from &#x3e;0.5 to 250 &#x3bc;m. Process for producing a shaped body, in which to the mix is introduced into a mould, pressed if appropriate and heated to a temperature at which the synthetic resin crosslinks thermally. Shaped body which can be obtained therefrom. Process for producing a refractory shaped body, in which the shaped body is carbonized. Refractory shaped body which can be obtained therefrom.

Mix and refractory product having a high hydration resistance produced therefrom

Carbon black with a content of polycyclic aromatic hydrocarbons measured by the 22 PAH method of less than 5 ppm and an STSA surface area of &#x3c;90 m/g. The carbon black is prepared by treating the starting carbon black with electromagnetic radiation. The carbon black can be used in rubber, plastics, printing inks, liquid inks, inkjet inks, toners, coating materials, paints, adhesives, batteries, pastes, paper, fuel cells, bitumen, concrete and other building materials.

Carbon black, a process for preparation thereof and use thereof

Preparation for producing refractory materials, characterized in that it comprises one or more particulate, refractory components and one or more binders, where&#x2014;the particulate, refractory component has a mean particle diameter of &#x3e;0.3 m and&#x2014;the binder is selected from among&#x2014;from 0.05 to 50% by weight of a very finely particulate binder having a mean particle diameter of from 10 nm to 0.3 m selected from the group consisting of aluminum oxide, titanium dioxide, zirconium dioxide and/or mixed oxides of the abovementioned oxides, &#x2014;from 0 to 20% by weight of an inorganic binder, from 0 to 20% by weight of a hydraulically setting binder, &#x2014;from 0 to 15% by weight of an organic, silicon-free binder&#x2014;and the preparation additionally contains from 0 to 35% by weight of water, where&#x2014;the proportion of the particulate, refractory component is equal to 100 and the percentages of the further materials in the preparation are based on the particulate component.

Preparation for producing refractory materials

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Alzenau, Germany

Christoph Tontrup