Solid block acid containing cleaning composition for...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 1/66 (2006.01) C11D 3/02 (2006.01) C11D 3/20 (2006.01) C11D 3/32 (2006.01) C11D 11/00 (2006.01) C11D 17/00 (2006.01) C11D 17/04 (2006.01)

Patent

CA 2701213

The invention relates to solid block acid containing cleaning compositions comprising based on the composition A) - 75 wt-% of at least one liquid mineral acid selected from the group consisting of phosphoric acid, sulphuric acid, sulphurous acid, and nitric acid, B) 1 - 60 wt-% of at least one solid organic acid with pKa at 20°C between 1.0 and 1.1, C) 15 - 80 wt-% of at least one carboxylic acid selected from the group consisting of citric acid monohydrate, hydroxyacetic acid, maleic acid, succinic acid, glutaric acid and adipinic acid, D) 5 - 40 wt-% urea, E) 0.1 - 10 wt-% of at least one non-ionic surfactant, and the rest up to 100 wt-% is water, wherein the composition contains less than 1 wt-% nonylphenol ethoxylates and halogen compounds.

Cette invention concerne des compositions de nettoyage contenant un acide solide comprenant, sur la base de la composition, A) de 10 à 75 % en poids d'au moins un acide minéral liquide choisi dans le groupe constitué par l'acide phosphorique, l'acide sulfurique, l'acide sulfureux, et l'acide nitrique, B) de 1 à 60 % en poids d'au moins un acide organique solide ayant un pKa à 20°C compris entre 1,0 et 1,1, C) de 15 à 80 % en poids d'au moins un acide carboxylique choisi dans le groupe constitué par le monohydrate d'acide citrique, l'acide hydroxyacétique, l'acide maléique, l'acide succinique, l'acide glutarique et l'acide adipinique, D) de 5 à 40 % en poids d'urée, E) de 0,1 à 10 % en poids d'au moins un tensioactif non ionique, le reste jusqu'à 100 % en poids étant de l'eau. Ladite composition contient moins de 1 % en poids d'éthoxylates de nonylphénol et de composés halogénés.

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