Abstract: Sulfated tall oil surfactant was prepared with tall oil and concentrate sulfuric acid as starting materials.The influences of reaction time,temperature,stirring rotation speed and molar ratio of sulfuric acid to tall oil on the foaming performance of the surfactant were investigated via single-factor experiments.Results showed that the recommended conditions are:reaction time,6 h;reaction temperature,40 ℃;reaction stirring rotation speed,600 r/min;and molar ratio of sulfuric acid to tall oil,1∶5.Meanwhile,different kinds of neutralizing agent were tested for making the surfactant product and results showed that surface tension of all the surfactant products achieves 28-33 mN/m,but that neutralized with N-methyldiethanolamine displays the best foaming power of 350 mL and best foam stability of 27 min half-life period.Blend of such surfactant product with ammonium stearate at a mass ratio of 2∶3,the foaming power achieves 550 mL foam stability of 35 min half-life period.

Key words: surfactant, sulfated tall oil, preparation, foaming performance