Study on the Characteristics of Static Adsorption about the Nonionic Surfactant

According to the issues that the system of S/P binary complex's adsorption on the rocks which resisted in the oil reservoir,with the analyzing methods such as indoor instruments,the concentration and interfacial tension of the active agent were tested and evaluated after which,belonging to the system of alkali-free binary complex's adsorption,were used to absorb the Daqing wetting or non-wetting oil sands.The results show that: the adsorption isotherm of binary system surfactant on the Daqing oil sands is the type of S,the maximum adsorption is 2.43 mg/g;With changing single adsorption of oil sands,the times of adsorption increase,interfacial tension increase,the concentration of surfactant decrease.When the third adsorption,The oil sand is soaked by polymers and waste water can be seen from.Binary complex's interfacial tension ascends from 10-3 mN/m to 10-1 mN/m.Repetitious adsorption have a little influence on the interfacial tension of binary system.With the increase of the times of adsorption,the concentration of surfactant decrease.