A process for the production of water-and dust-free sugar...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 1/52 (2006.01) C07H 15/04 (2006.01) C11D 1/66 (2006.01) C11D 3/22 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2232133

Proposed is a new method for preparing granulated anhydrous and non-dusting sugar surfactants of high bulk density, wherein aqueous pastes of a) alkyl- and/or alkenyloligoglycosides and/or b) fatty acid-N-alkylpolyhydroxyalkyl amides with a solids content of at least 20 wt % are simultaneously pelletized and dried to a residual water content of less than 2 wt % in a horizontal thin- film evaporator with rotating components, a temperature gradient being applied to the thin-film evaporator from product input to product discharge and a gas treatment being effected with counterflow air.

L'invention concerne un nouveau procédé de fabrication de granulés tensioactifs de sucre sans eau ni poussière, de densité apparente élevée. Selon ce procédé, des pâtes aqueuses a) d'alkyloligoglucosides et/ou d'alcényloligoglucosides et/ou b) de N-alkylpolyhydroxyalkyamides d'acides gras ayant une teneur en solides d'au moins 20 % en poids sont fractionnées en granulés, et séchées simultanément jusqu'à obtention d'une teneur en eau résiduelle inférieure à 2 % en poids dans un vaporisateur à couche mince horizontal contenant des composants rotatifs. On applique à l'évaporateur à couche mince un gradient de température, l'introduction et le déchargement du produit, et un traitement au gaz est réalisé avec de l'air à contre-courant.

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