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Summary Methods have been described for converting liquid nonionic surface‐active agents of the polyoxyethylene type to solid compositions by complexing with urea. It is shown how these solid products may be made in the form of free‐flowing powders, flakes, bars, pellets, or tablets. The surface‐active properties of two commercial detergents based on this discovery are reported. Besides showing the excellent detergency of these products in washing artificially soiled cotton, it has been shown that they enhance the detergency of alkalibuilt sodium alkylaryl sulfonates in hard water.
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Barker et al. (1955) studied this question.
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