Research In Synthesis And Performance Of Fatty Alcohol Polyoxyethylene Ether Sulfonate

Fatty alcohol polyoxyethylene ether sulfonates (AESO) is a kind of salt resistance,temperature resistant, anionic, nonionic surfactant, with other types of surfactant canimprove crude oil mobility, expand the scope, improve recovery factor, is a kind of can beapplied to three tenors (high temperature, high salinity and high calcium and magnesiumions) reservoir, the excellent performance of new tertiary oil recovery with surface activeagent, for the development of oil fields in our country at present, fatty alcoholpolyoxyethylene ether sulfonic acid salt surfactants synthesis and performance researchplays an important role to improve the oil recovery factor.Combination of experimental conditions and is conducive to the implementation ofthe industrialization, on the basis of using halogenated alcohol ether synthesis fatty alcoholpolyoxyethylene ether sulfonates, this paper mainly study to oxygen ethyl baserespectively for3,5,7,9fatty alcohol polyoxyethylene ether (AEO-3, AEO-5, AEO-7,AEO-9) as raw material, under solvent-free conditions and sulfoxide chloride (SOCl2)chlorinated reaction preparation of chlorinated aliphatic alcohol polyoxyethylene etherintermediates, intermediates in the purification process is studied in detail, when use hotwater washing, solution is a milky white, after cooling in oil-water two layers, ethyleneoxide in the purification process required water temperature is higher, the greater thenumber of ethylene oxide were for3,5,7,9intermediates required water temperature60℃,70℃,80℃,90℃; Intermediates in the process of reaction raw materials, ratio of reactants,the reaction time and reaction temperature on reaction results. Synthesis of chlorinatedaliphatic alcohol polyoxyethylene ether sulfonates intermediates of appropriate reactionconditions for: SOCl2/AEO (mole ratio)=1.8：1.0, the reaction temperature70℃, reactiontime,10h, chlorinated alcohol ether intermediates production rate of81.92%. Productshave been characterized by ir, proven product for chlorinated aliphatic alcoholpolyoxyethylene ether.Intermediates in the synthesis of chlorinated aliphatic alcohol polyoxyethylene ether,sodium hydroxide, sodium methoxide as catalyst and hydroxyethyl sodium sulfonate(C2H5NaSO4) reaction to generate fatty alcohol polyoxyethylene ether sulfonates (AESO).When sodium hydroxide as catalyst was optimized reaction conditions, the reactiontemperature is120℃, n(C2H5NaSO4)/n(chlorinated alcohol ether)=1.6:1, then(NaOH)/n(C2H5NaSO4)=1.5:1,10h, the reaction time of AESO production rate is11.43%; CH3ONa of sodium methoxide as catalyst were analyzed using single factor when the weight ratio, catalyst dosage, reaction temperature, reaction time on the reaction, theeffect of experiment is better reaction conditions as follows: reaction temperature is110℃,n（C2H5NaSO4）/n(chlorinated alcohol ether)=1.6:1, n（CH3ONa）/n（C2H5NaSO4）=2.5:1,the reaction time8h, AESO yield is56.81%. The product have been characterized by ir.Finally, the synthetic product AESO interface resistance, salt resistance, temperaturetolerance and oil displacement were studied.