Calcium Chelating Sugar-Based Surfactants for Hard-Water Detergency
Journal of Surfactants and Detergents(2011)
Abstract
Hard water can decrease the detergency efficiency of surfactants due to a significant concentration of divalent cations as Ca 2+ or Mg 2+ . The formulation of a cleaning detergent must be modified and it is usual to add more surfactants or a huge quantity of sequestrating agents. This supplementary addition can have deleterious effects on the environment and increases the price of the formulation. A surfactant, presenting both detergency capacities in the presence of Ca 2+ and Ca 2+ chelating properties, would be of great interest. In this paper, we report on Ca 2+ extraction with sugar-based chelating surfactants using an experimental device, namely a flotation column, as both chelating properties and foaming properties in the presence of Ca 2+ are important in the flotation process as well as in detergency. Among all the sugar-based surfactants tested, a few of them were able to extract calcium and thus demonstrated the expected characteristics.
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Key words
Sugar-based surfactants,Chelation,Flotation,Calcium sequestration,Hard water,Detergency
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