cloud point Cloud Point Langmuir 2002, 18 (11) , 4205-4209. GT 2624. A cloud point extraction (CPE) process using the two nonionic surfactants, Tergitol 15-S-9 and Tergitol 15-S-7, mixtures of secondary ethoxylated alcohols, to extract selected polycyclic aromatic hydrocarbons (PAHs) from aqueous solutions at 25°C was investigated. For a set of 62 structures, composed of linear alkyl, branched alkyl, cyclic alkyl, and alkylphenyl ethoxylates, cloud points can be estimated to an accuracy … Predicting Surfactant Cloud Point from Molecular Structure J Colloid Interface Sci. The solubility of polyoxyethylated nonionic surfactants (POSs) in water is limited by an upper and a lower critical temperature. Each of these methods is limited regarding the surfactant type and the magnitude of the partition coefficient. An Easy Guide to Understanding How Surfactants Work Alternatively, considered in its broadest aspects, any surfactant which has a cloud point of ≧0° C. and ≦25° C. and could be substituted for Antarox BL-214 and any surfactants with a cloud point of ≦25° C. and ≧60° C. could be substituted for Antarox BL-240, although these Antarox surfactants are the preferred because they offer both quick breaking foam and good …