Synthesis And Application Of Novel Alkylbenzene Sulphonate Gemini Surfactants

A series of new Gemini surfactants with different space group and side chain were synthesized in this paper, and its, interface quality were compared by various tests.Which were expected to be exploited to enhance oil recovery in tertiary oil recovery.The traditional surfactants were widely used in the emulsion polymerization,how- ever,it is scarce for Gemini to be reseached and used in it. Therefore,Gemini surfactants used in emulsion polymerization were investigated in the paper and the concrete contents were as follows:1. Series of Gemini of salt alklybenzenesulfonates were synthesized by changing space and side chain from toluene, benzene, triethanolamine, dichloromethane or 1,4-dichlorobutane, 1,2-dichloroethane, Dodecanoic acid and pyridine through three-step process, involving Friedel-Crafts reaction, sulfonation and neutralization. The structures of the intermediates products were characterized by IR and 1H NMR.2. The isomers of salt alklybenzenesulfonates were synthesized from chloride and o-xylene through five-step process, involving Friedel-Crafts reaction, Grignard reaction, reduction, sulfonation and neutralization.The alklynaphthalenesulfonates were synthesized by Friedel-Crafts reaction, Clemmensen Reduction, sulfonation reaction and neutralization.3. The surface tension of dilute aqueous solutions of products was measured at 25℃by Drop-volume method and then the critical micelle concentration (CMC) was determined. These results by reseaching the effect on surfactant at the different structure of space and side chain indicated theγCMC and CMC reduced with the increasing of carbon atom of the side chain alkyl or bridge chain. It's also found the CMC and value of surface tensions of salt that was neutralization with triethanolamine was the lowest in all of salt alklybenzenesulfonate.4. The surface and interfacial tension behavior of this series of alkylbenzene sulfonates and Gemini surfactant was investigated in aqueous system and crude oil/aqueous system respectively.The surface and interfacial tension active quality of alkylbenzene sulfonates and Gemini surfactant were elaborately researched, furthermore, which were explored simply to be used in the emulsion polymerization.5. Some Gemini with excellent quality in all surfactants were reseached to be employed as emulsifier in the emulsion polymerization in order to get some helpful theoretical support.