Particulate laundry detergent compositions containing...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 17/06 (2006.01) C11D 1/22 (2006.01) C11D 1/37 (2006.01) C11D 1/83 (2006.01) C11D 3/10 (2006.01) C11D 11/04 (2006.01) C11D 17/00 (2006.01) C11D 1/29 (2006.01)

Patent

CA 2351760

A particulate laundry detergent is composed of at least two different granular components, one of which is an anionic surfactant granule having a bulk density of 300-600 g/l comprising linear alkylbenzene sulphonate on a particulate carrier material comprising of sodium carbonate and an optional finely-divided water-insoluble particulate material, preferably zeolite, which must be present if the average particle size of the sodium carbonate exceeds 40 µm. Also present is at least one other selected granular detergent component. The anionic surfactant granule may be prepared by in-situ neutralisation of alkylbenzene sulphonic acid with sodium carbonate in a fluidised bed.

La présente invention concerne un détergent de blanchisserie particulaire contenant au moins deux composants granulaires différents, dont l'un représente des granulés de tensio-actif anionique de masse volumique apparente comprise entre 300 et 600 g/l, contenant de l'alkylbenzène sulfonate linéaire dans un matériau porteur particulaire constitué de carbonate de sodium, et éventuellement d'un matériau particulaire finement divisé insoluble dans l'eau, de préférence de la zéolite, si la taille particulaire moyenne du carbonate de sodium dépasse 40 mu m. En outre, ce détergent contient au moins un autre composant détergent granulaire sélectionné. On peut préparer les granulés de tensio-actif anionique in situ en neutralisant l'acide alkylbenzène sulphonique avec du carbonate de sodium dans un lit fluidisé.

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