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以1,3-二氯-2-丙醇和二乙胺为原料合成一种空间位阻胺1,3-二(二乙胺基)-2-丙醇(BDAP)。采用Chem Bio 3D软件对BDAP分子进行键角及空间位阻能分析。利用单因素分析法对合成条件进行优化,探讨反应物摩尔比、反应时间、反应温度以及反应介质与产物产率的关系,并用红外光谱(IR)和核磁共振氢谱(1HNMR)对产物结构进行表征。在二乙胺与1,3-二氯-2-丙醇的摩尔比为3∶1,反应温度为110℃,反应时间为6 h,反应介质无水乙醇与反应物之间的体积比为1∶1时,BDAP产率最高,达到91.1%。脱硫性能测试表明:BDAP对H2S的酸气负荷达到0.137 8,同样条件下脱硫性能优于MDEA。BDAP的吸收选择性在同等条件下也优于MDEA。
A sterically hindered amine, 1,3-bis (diethylamino) -2-propanol (BDAP) was synthesized from 1,3-dichloro-2-propanol and diethylamine. The key angle and steric hindrance of BDAP molecules were analyzed using Chem Bio 3D software. The synthesis conditions were optimized by one-factor analysis. The molar ratio of the reactants, the reaction time, the reaction temperature and the relationship between the reaction medium and the yield of the product were investigated. The structure of the product was characterized by IR and 1HNMR Characterization. The molar ratio of diethylamine to 1,3-dichloro-2-propanol was 3:1, the reaction temperature was 110 ℃, the reaction time was 6 h, the volume ratio of absolute ethanol to the reaction medium was At 1: 1, BDAP had the highest yield of 91.1%. Desulfurization performance tests showed that the acid gas loading of BDAP to H2S reached 0.137 8, and the desulfurization performance was better than MDEA under the same conditions. Absorption selectivity of BDAP is also superior to MDEA under the same conditions.