离子液体催化苯与1-十二烯烷基化的循环反应分离实验装置

RECYCLING SET-UP FOR ALKYLATION OF BENZENE WITH 1-DODECENE CATALYSED BY IONIC LIQUID

针对酸性氯铝酸盐室温离子液体 [BMIM][AlCl4]催化苯与 1 十二烯烷基化合成十二烷基苯 (LAB)反应体系双液相、反应速率高和催化剂对湿气敏感的特点 ,建立了一套既可间歇操作也可连续操作的强制混合 反应 分离 再循环实验装置 .循环物料和离子液体的混合与烷基化反应在一台静态混合反应器中进行 ,反应后料液和离子液体在一台液 液沉降器中进行分离 .运行结果表明 ,在一定的物料循环和离子液体注入流量范围内 ,可以实现离子液体催化剂和反应料液的高效、快速混合与分离 ,催化剂被有效地保留在反应系统内并实现了它的再循环 .

Based on the bi-phase and high reaction rate properties of benzene alkylation with 1-dodecene catalyzed by [BMIM][AlCl 4] ionic liquid, a continuous mixing-reacting-separating-recycling experimental setup was developed.A static mixing reactor was used to realize the needed fast mixing and chemical reaction.The continuous fast separation of ionic liquid from reaction mixture was carried out in a combined settling separator.Running tests showed that the continuous efficient mixing and separation between ionic liquid catalyst and reaction mixture could be accomplished within some flow rate ranges of the recycling reaction mixture and the ionic liquid catalyst injected.The moisture-sensitive ionic liquid catalyst could be effectively ratained in the system and recycled.Alkylation tests demonstrated that the setup could be successfully used to synthesize LAB with relatively higher 2-phenyl LAB selectivity.