A process for the production of granules suitable as wetting...

B - Operations – Transporting – 01 – D

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B01D 1/16 (2006.01) B01D 1/18 (2006.01) B01J 2/16 (2006.01) C11D 11/00 (2006.01) C11D 11/02 (2006.01) C11D 11/04 (2006.01) F26B 3/12 (2006.01) F26B 21/04 (2006.01)

Patent

CA 2130000

2130000 9315813 PCTABS00024 Granulates are produced from their aqueous solutions and/or suspensions by fluidized bed spray granulation in a hot fluidizing gas in the normal pressure range. Overheated steam is used as fluidizing gas and the granulate is evacuated from the granulator before it risks being damaged by heat exposure. If required, the storage-stable looseness and pourability of the partially dried substance is ensured by admixture of components capable of binding limited amounts of water and/or by a subsequent treatment. The system is a closed system in which a current of steam circulates, from which the water evaporated from the process substance is drawn as a partial current and to which the released thermal energy is supplied again. The process is free from exhaust fumes and contanimated waste waters, without diminishing the quality of the granulate produced on a large scale.

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