Degussa Aktiengesellschaft

Degussa-hus Aktiengesellschaft

Evonik Degussa Gmbh

Hans-Christian Alt

Rudiger Schutte

Claas-Jurgen Klasen

Alexander Ruhs

Heinz Friedrich

Martin Bewersdorf

Andreas Hofler

Ulrich Hertz

Claas-Jürgen Klasen

Lothar Morl

Andreas Höfler

Rüdiger SCHÜTTE

Lothar Mörl

Process and device for producing granulates by fluidized bed spray

A process for the preparation of an animal feed supplement based on fermentation broth is disclosed, wherein the supplement contains wholly or predominantly a fermentation product and the other constituents of the fermentation broth, which is characterised in that the fermentation broth is granulated, compacted and dried in a fluidised bed in one step whilst a sufficient amount of energy to obtain a desired particle diameter and a desired bulk density is introduced into the fluidised bed by mechanical device in addition to the energy required to produce the fluidised bed. As a result of this, it is possible, inter alia, to prepare continuously, in a single process step, granules conforming to specification of additives such as lysine, threonine or tryptophan using, in particular, raw fermentation broths as starting substance.

Process for the preparation of an animal feed supplement based on

Method and apparatus for producing sodium perborate monohydrate by dehydrating sodium perborate tetrahydrate in a fluid bed with heated air. Contact surfaces are arranged inside the fluid bed whose total area is the same as up to 500 times the area of the approach-flow bottom of the fluid bed. The contact surfaces are advantageously designed as heat exchangers whose surface temperature is adjusted to maintain 90.degree. to 110.degree. C. at the contact surfaces. The method results in a sodium perborate monohydrate with especially high abrasion resistance. In addition, the energy requirement is lower than that provided in the previously known method commonly used in the industry.

Apparatus for producing sodium perborate monohydrate and product

Method for producing sodium perborate monohydrate

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Gelnhausen, Germany

Hans-Christian Alt