Abstract
A kinetic equation for detergency of fatty acid soil as a function of solubilization capacity of washing liquid was studied. A cylindrical lump of palmitic acid was rotated in sodium dodecyl sulfate solution and the solute concentration was measured by a differential refractometer. The results could be applied to the first order kinetic equation in which the maximum solubilization amount is supposed to the initial concentration of reactant, and reactant concentration is supposed to solubilization capacity of the washing liquid. The detergency curves of soiled cloth failed to obey this equation. Geometric conditions of soil greatly affect the solubilization rate.
