Processes for making granular detergent composition having...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 17/06 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2346926

A multi-step process for making a granular detergent composition. The processing steps include adding to a mixer a first feed stream selected from a first powder, a first liquid, and mixtures thereof, to form a second feed stream. The second feed stream is added to a fluid bed dryer to form the granular detergent composition, and optionally, a third feed stream selected from a second powder, a second liquid, and mixtures thereof can be added to the fluid bed dryer. The granular detergent composition contains at least about 50 % by weight of particles having a geometric mean particle diameter of from about 500 microns to about 1500 microns with a geometric standard deviation of from about 1 to about 2. Further, at least a portion of the particles contain a detersive surfactant or a detergent builder.

L'invention concerne un procédé permettant de préparer une composition détergente granuleuse en plusieurs étapes. Ce procédé consiste tout d'abord à fournir à un mélangeur un premier flux d'alimentation choisi parmi une première poudre, un premier liquide, et des mélanges de ceux-ci, de manière à former un deuxième flux d'alimentation. Ce procédé consiste ensuite à fournir ce deuxième fluide à un séchoir à lit fluidisé afin de former la composition détergente granuleuse, et éventuellement à sélectionner un troisième fluide d'alimentation parmi une seconde poudre, un second liquide, et des mélanges de ceux-ci, ce troisième fluide pouvant être fourni audit séchoir à lit fluidisé. La composition détergente granuleuse de cette invention contient environ 50 % en poids de particules dont le diamètre géométrique moyen de particule varie entre 500 micromètres et 1500 micromètres environ, et l'écart-type géométrique approximativement entre 1 et 2. De plus, au moins une partie des particules contient un tensioactif détersif ou un adjuvant de détergence.

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