Detergent component containing anionic surfactant and...

C - Chemistry – Metallurgy – 11 – D

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C11D 17/06 (2006.01) C11D 1/14 (2006.01) C11D 1/22 (2006.01) C11D 3/10 (2006.01) C11D 3/12 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2164106

A free-flowing granular detergent composition or component having a bulk density of at least 550 g/litre comprises an anionic surfactant of which the acid form is a liquid at ambient temperature, preferably primary alcohol sulphate and/or alkylbenzene sulphonate; zeolite; and alkali metal, preferably sodium, carbonate. The level of sodium carbonate is 2-12 wt% when the anionic surfactant is wholly primary alcohol sulphate, otherwise 2-25 wt%. The compositions have lower levels of carbonate and higher surfactant loadings than previously disclosed materials, without loss of powder properties. The materials are preferably prepared by a granulation process involving in-situ neutralisation of anionic surfactant acid by carbonate in a high-speed mixer/granulator.

Une composition détergente granulaire à écoulement libre ou un composant ayant une masse volumique en vrac d'au moins 550 g/litre comprend un tensioactif anionique dont la forme acide est un liquide à température ambiante, de préférence un sulfate d'alcool primaire et/ou un sulfonate d'alkylbenzène; une zéolite; et un métal alcalin, de préférence le carbonate de sodium. Le niveau du carbonate de sodium est compris entre 2 et 12 % en poids lorsque le tensioactif anionique est entièrement un sulfate d'alcool primaire, sinon le niveau est compris entre 2 et 25 % en poids. Les compositions ont des niveaux inférieurs de carbonate et des charges de tensioactifs inférieures aux matériaux antérieurement décrits, sans que la poudre perde ses propriétés. Les matériaux sont de préférence préparés par un procédé de granulation consistant à neutraliser in situ l'acide du tensioactif anionique par le carbonate dans un mélangeur/granulateur à haute vitesse.

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