Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Claas-Jürgen Klasen

Heinz Friedrich

Hans Christian Alt

Joachim Pohlisch

Hans-Christian Alt

Andreas Höfler

Stefan Stockhammer

Matthias Moll

Ralf Maus

Thomas Barthel

Rüdiger SCHÜTTE

Lothar Mörl

The invention relates to a process for the granulation of an animal feedstuffs additive comprising amino acids or vitamins in a circulating fluidized bed, wherein the additive is preferably a fermentation product and optionally comprises further constituents from the fermentation broth.

Process for the granulation of an animal feedstuff additive

The present invention provides silica particles, which include the following physical properties: BET surface area: 100-700 m/g; DBP absorption: 100-500 g/100 g; tamped density: 100-250 g/l; ALPINE sieve residue&#x3e;63&#x3bc;: &#x3c;5%; and particle sizes (cumulative volume distribution): d&#x3c;40 &#x3bc;m; d&#x3c;20 &#x3bc;m; and d&#x3c;10 &#x3bc;m. The present invention also provides a process for producing silica having a narrow particle size distribution, which includes drying a silica suspension in a pulse combustion dryer to produce silica particles having the following particle size distribution (cumulative volume distribution): d&#x3c;10 &#x3bc;m; d&#x3c;20 &#x3bc;m; and d&#x3c;40 &#x3bc;m.

Precipitated silicas having a narrow particle size distribution

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Freigericht, Germany

Claas-Jürgen Klasen