Process for the preparation of granules
AssigneeDsm IP Assets B.V.
InventorJohannes Henricus Mennen
Life of this patent
Estimating the term…
Abstract
Process for the preparation of granules from a liquid composition by spraying the liquid composition in the granulation zone of a granulating device onto or over solid particles present in the granulation zone that are being kept in motion, as a result of which these particles grow, and withdrawing a stream of particles from the granulation zone, yielding a stream of particles of the desired size, with a part of the air flow leaving the granulating device during granulation being returned to the granulating device. In this way only a small part of the air flow needs to be purified of the starting materials.
Claims4
Process for the preparation of granules from a liquid urea-containing composition by spraying the liquid composition in the granulation zone of a granulating device onto or over solid particles present in the granulation zone that are being kept in motion by an air flow through the granulation zone, as a result of which these particles grow, and withdrawing a stream of particles from the granulation zone, yielding a stream of particles of a desired size, wherein, during granulation, between 70 and 90 vol. % of the air flow leaving the granulating device is returned to the granulating device, and the remaining part of the air flow is vented to the atmosphere.
Dependencies are inferred from the claim text.