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采用碳基固体酸作酯化反应催化剂于常压下反应的方法合成了乙二醇双子琥珀酸2-乙基丁基酯磺酸钠,酯化反应无需有机溶剂,磺化反应不外加相转移催化剂。最佳工艺条件为:单酯化反应,n(乙二醇)∶n(顺酐)=1.00∶2.10,催化剂碳基固体酸用量为顺酐质量的2%,100℃反应4.7 h,酯化率99.21%(质量分数);双酯化反应,n(2-乙基-1-丁醇)∶n(顺酐)=1.30∶1.00,于210℃反应1 h,酯化率95.17%(质量分数);磺化反应,n(亚硫酸氢钠)∶n(顺酐)=1.05∶1.00,于120℃反应1 h,磺化率100.65%(质量分数)。对产物结构进行了IR和1HNMR光谱表征,对产物性能进行了测定:CMC为2.99×10-3mol/L,γCMC为27.96 mN/m,乳化力4.35 min,渗透力为11.6 s,耐硬水力为13.3 min。
Carbonyl-based solid acid as esterification catalyst was reacted at atmospheric pressure to synthesize sodium 2-ethylbutylsulfonate of ethylene glycol dibasic succinate. No organic solvent was needed in the esterification reaction, and no phase transfer catalyst. The optimum conditions were as follows: monoesterification reaction, n (ethylene glycol): n (maleic anhydride) = 1.00: 2.10, the amount of solid carbon acid catalyst was 2% of maleic anhydride, The yield was 99.21% (mass fraction). The esterification rate was 95.17% (mass ratio) with the esterification reaction of n (2-ethyl-1-butanol) (Sulfite), n (sodium bisulfite): n (maleic anhydride) = 1.05:1.00, and reacted at 120 ℃ for 1 h. The sulfonation rate was 100.65% (mass fraction). The product structure was characterized by IR and 1HNMR. The product properties were determined: CMC was 2.99 × 10-3mol / L, γCMC was 27.96 mN / m, emulsification force was 4.35 min, penetration was 11.6 s, resistance to hard water was 13.3 min.