Free-flowing agglomerated nonionic surfactant detergent...

C - Chemistry – Metallurgy – 11 – D

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C11D 1/66 (2006.01) C11D 1/72 (2006.01) C11D 3/10 (2006.01) C11D 3/20 (2006.01) C11D 11/00 (2006.01) C11D 17/06 (2006.01)

Patent

CA 2248994

A free-flowing agglomerated powder detergent process and the resulting composition includes from about 5 % to about 80 % of an alkali metal carbonate; from about 5 % to about 50 % of a detergent surfactant, and up to about 25 % of an alkali metal salt of a carboxylic acid, wherein the carboxylic acid is selected from the group of carboxylic acids that, below a first temperature, have a greater water solubility than the water solubility of its corresponding alkali-metal salt. The alkali-metal salt is preferably provided solely by the reaction of (a) a premix comprising the alkali-metal carbonate coated with the surfactant, (b) a carboxylic acid selected from the group consisting of citric acid, malic acid, and mixtures thereof, and (c) water.

Procédé faisant appel à un détergent en poudre aggloméré fluide et composition en résultant, comprenant entre environ 5 % et environ 80 % de carbonate métallique alcalin; entre environ 5 % et environ 50 % d'un tensioactif détergent, et jusqu'à environ 25 % d'un sel métallique alcalin d'un acide carboxylique, dans lequel l'acide carboxylique est choisi dans le groupe constitué des acides carboxyliques qui, au-dessous d'un premier seuil de température, présentent une solubilité dans l'eau supérieure à la solubilité dans l'eau du sel métallique alcalin correspondant. Le sel métallique alcalin est de préférence obtenu uniquement par la réaction de a) une solution prémélangée constituée du carbonate métallique alcalin enrobé de tensioactif, b) d'un acide carboxylique choisi dans le groupe constitué d'acide citrique, acide malique et des mélanges de ceux-ci, et c) d'eau.

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