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The aim of this work was to formulate and optimize the washing performance of an alkylpolyglucoside-based dishwashing detergent. The liquid detergent was formulated with five ingredients of commercial origin: anionic (linear sodium alkylbenzenesulfonate and sodium laurylethersulfate), nonionic (C 12 -C 14 alkylpolyglucoside) and zwitterionic (a fatty acid amide derivative with a betaine structure) surfactants, and NaCl for viscosity control. In addition to the plate test, other properties were investigated including ''cloud point'', viscosity, and emulsion stability. Statistical analysis software was used to generate a central composite experimental design. Then, a second order design and analysis of experiments approach, known as the Response Surface Methodology, was set up to investigate the effects of the five components of the formulation on the studied properties in the region covering plausible component ranges. The method proved to be efficient for locating the domains of concentrations where the desired properties were met.

Résumé -Nouvelle méthode de contribution de groupes pour l'estimation des propriétés physiques des hydrocarbure -Dans le présent article, nous proposons une nouvelle méthode de contribution de groupes pour l'estimation de la température d'ébullition, du point de congélation et de la densité liquide à 20°C des hydrocarbures purs. La méthode a été établie avec une assez bonne précision et, comparée à d'autres méthodes de contributions de groupes, elle a enregistré de meilleurs résultats en termes de déviations standard moyennes. Abstract -A New Group-Contribution Method for the Estimation of Physical Properties of