1-(2-羟乙基)-4-(2-羟丙基)哌嗪基复合胺脱硫剂的合成与性能

Synthesis and Properties of 1-(2-Hydroxyethyl)-4-(2-Hydroxyethyl)Piperazinyl Mixed Desulfurizer

以哌嗪(PZ)、环氧乙烷(EO)、环氧丙烷(PO)为原料,以水为溶剂,PZ先与EO反应后中间产物再与PO反应合成1-(2-羟乙基)-4-(2-羟丙基)哌嗪基复合胺脱硫剂。在PZ初始浓度为0.1 g/mL H;O,PZ∶EO∶PO摩尔比为1∶0.8∶1.2,PZ与EO、PO的反应温度分别为35℃、25℃,中间产物与PO在反应时间为150 min的优化条件下,所得复合胺脱硫剂成分为1-(2-羟乙基)-4-(2-羟丙基)哌嗪、N,N′-二(2-羟丙基)哌嗪、N-(2-羟乙基)哌嗪、N-(2-羟丙基)哌嗪、N,N′-二(2-羟乙基)哌嗪、N-(1-甲基-2-羟乙基)哌嗪和哌嗪,其对气体SO;的饱和吸收量为0.721 8 mol/mol,解吸率为98.37%。

Using piperazine(PZ),ethylene oxide(EO)and propylene oxide(PO)as raw materials and water as solvent,1-(2-hydroxyethyl)-4-(2-hydroxyethyl)piperazinyl compound amine desulfurizer was synthesized by reaction of PZ with EO and intermediate product with PO.Under the optimized conditions,the initial concentration of PZ is 0.1 g/mL H;O,the molar ratio of PZ∶EO∶PO is 1∶0.8∶1.2,the reaction temperatures of PZ with EO and PO are 35℃ and 25℃,respectively,and the reaction time of intermediate product with PO is 150 min.The compositions of compound amine desulfurizer were 1-(2-hydroxyethyl)-4-(2-hydroxyethyl)piperazine,N,N′-bis(2-hydroxyethyl)piperazine,N-(2-hydroxyethyl)piperazine,N,N′-bis(2-hydroxyethyl)piperazine,N-(1-methyl-2-hydroxyethyl)piperazine and piperazine.The saturated absorption of SO;was 0.721 8 mol/mol,and the desorption rate was 98.37%.