Study on Interfacial Activity of AS 4 Sulfonate Aqueous Solution and Crude Oil

Using Intermediate product of petroleum as original reagent,the hydrocarbon phenyl sulfonate surfactant,named as AS 4,has been synthesized.The effects of the concentration and composition of AS 4 on the dynamical interfacial tension of AS 4/alkali/crude oil system at different salinities,alkalinitise were examined and discussed.The result shows that when salinity is in 5~15g/L Na 2SO 4, alkalinity in 5~10g/L NaOH,surfactant AS 4 concentration in 0.1~0.5g/L,AS 4/alkali/crude oil system has ultra low minimum interfacial tension of less than 10 -3 mN/m.