The invention relates to a biquaternary
ammonium salt and bisulfonate surfactant, which is N,N'-
ethylene bis[ethyl
alkyl (
sodium) p-
benzene-
sulfonate ammonium bromide]. The synthesis method of the biquaternary
ammonium salt and bisulfonate surfactant comprises the following steps of: (1) dissolving a
sodium hydroxide in a mixed
solvent of
ethanol and water to prepare solution, adding the solution into a three-necked flask with a stirrer and a return condenser, then adding a
sulfanilic acid into the flask and slowly dripping 1,2-dibromoethane under a condition of a pH value of 8 to 10; (2) adding the product generated by step (1) in a reactor, adding a long-chain bromoalkane with stirring, adjusting the pH to around 8 and iltering out and
drying a precipitate precipitated after the reaction is completed; and (3) adding the product generated by step (2) into a reactor, adding a
mixed solution of
distilled water and
ethanol, stirring the solution to dissolve the product, adding an
bromoethane, adjusting the pH to around 8, cooling the solution, filtering out under vacuum, washing and
drying precipitate precipitated when the reaction is completed and thus obtaining the surfactant. The surfactant has the advantages of very
high surface activity, simple synthesis method, mild reaction condition, simple and convenient operation, easy purification and separation and very good formulation performance.