Microwave‐Assisted Synthesis and Properties of Sodium Glycol Bis‐(Isooctyl)Sulfosuccinate

Abstract

AbstractAn anionic gemini surfactant was synthesized under microwave irradiation conditions. The optimum reaction conditions were obtained by the reaction of maleic anhydride, glycol, isooctyl alcohol and sodium sulfite. The first step esterification reaction was carried out at 90 °C and 100 W microwave power for 20 min with a ratio a nmaleic anhydride:nglycol = 2.1:1, and 1.0 wt% of catalyst. The second step esterification reaction was carried out at 80 °C for 25 min and 100 W microwave power. Optimum sulfonation was carried out with nsodium sulfite:nglycol bismaleic anhydride bisester = 2.25:1 and 1.5% catalyst for 25 min at 60 °C. It is found that microwave‐assisted synthesis is an efficient means of preparation of this anionic gemini surfactant with shorter reaction times and higher yields. The title compound structure was confirmed by IR. The critical micelle concentration of the title compound is 6.2 × 10−4 mol L−1, γCMC is 25.7 mN m−1, and benzene emulsion persistence was 2 days.