Sulfonate gemini surfactant and synthesis method thereof

The invention discloses a sulfonate gemini surfactant and a synthesis method thereof, and belongs to the technical field of surfactants. The synthesis method of the sulfonate gemini surfactant comprises the following steps: (1) carrying out amidation esterification reaction on alkyl alcohol amine and maleic anhydride to obtain an intermediate; (2) adding fatty alcohol and a solid acid catalyst into the intermediate, and carrying out double esterification reaction to obtain gemini maleic acid diester; and (3) adding a sulfonating agent into the gemini maleic acid diester for sulfonation to obtain the sulfonate gemini surfactant. According to the sulfonate gemini surfactant disclosed by the invention, the two ends of a linking group are respectively connected with an amide group and an ester group to form an asymmetric anionic gemini surfactant, so that the sulfonate gemini surfactant has dual effects of the amide group and the ester group, has good foaming, foam stabilizing and emulsifying properties, also has