N,N,N',N'-dodecyl-tetrasubstituted diphenyl ether sulfonate anionic gemini surfactant and synthesis method thereof

Abstract

The invention discloses an N,N,N',N'-dodecyl-tetrasubstituted diphenyl ether sulfonate anionic gemini surfactant and a synthesis method thereof. The structural formula of the anionic gemini surfactantis shown in the description. The anionic gemini surfactant is prepared by a two-step reaction. The synthesis method comprises the following steps: S1, carrying out amine alkylation on 4,4'-diaminodiphenyl ether and bromododecane to obtain N,N,N',N'-dodecyl-tetrasubstituted diphenyl ether; and S2, carrying out a sulfuration reaction on N,N,N',N'-dodecyl-tetrasubstituted diphenyl ether and concentrated sulfuric acid to obtain the target product N,N,N',N'-dodecyl-tetrasubstituted diphenyl ether sulfonate. The surfactant of the invention has a high surface activity, and the synthesis method has the advantages of simplicity, mild reaction conditions, and easiness in separation and purification. The surfactant of the invention is expected to be applied to alkali / surfactant combination flooding,polymer / surfactant binary combination flooding, alkali / surfactant / polymer ternary combination flooding, micro-emulsion emulsifiers in tertiary oil recovery, and also can be compounded with common surfactants to reduce the use cost and create conditions for large-scale application.

Description

Technical field [0001] The invention relates to the field of surfactants, in particular to a N,N,N',N'-dodecyl tetra-substituted diphenyl ether sulfonate anionic gemini surfactant and its synthesis. Background technique [0002] In 1971, Bunton et al. para-alkylene-bis(alkyl dimethyl ammonium bromide) [C m H 2m+1 N + (CH 3 ) 2 -(CH 2 ) 5 -C m H 2m+ 1 N + (CH 3 ) 2 ]Br - 2 The surface activity of this type of surfactant was studied, and the properties of this type of surfactant when the linking groups were hydrophilic, hydrophobic, flexible and rigid groups were investigated. (C.A. Bunton, L. Robinson. Catalysis of nucleophil csubstituions by micelles of dieationic detergent[J]. F. J. Org. Chem, 1971(36): 2346-2352). In 1974, Deinega et al. synthesized a group of new amphiphilic molecules whose molecular structure sequence is: long hydrocarbon chain, ionic head group, linking group, second ionic head group, second hydrocarbon chain (YPZhu ,A.Masuyama,Deinega,Preparation and prope...

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