CAJ | 학술논문

　　采用间歇减压精馏法实现了2-甲基吡啶和2-羟乙基吡啶这一热敏性混合物的分离，并考察了投料组成与操作压力对减压精馏过程的影响。结果表明，高真空条件降低了塔釜温度从而避免了物料在塔釜中受热变性，对于热敏物料2-羟乙基吡啶，减压精馏过程中压力应控制在4325 Pa以下，此时塔釜产品2-羟乙基吡啶的质量分数均能大于97%，同时收率能保持在86%以上。在压力为1325 Pa时，不同投料组成下塔顶产品2-甲基吡啶的质量分数和塔釜产品2-羟乙基吡啶的质量分数均高于98%，两者的收率也均在85%以上，能够很好地满足工业生产要求。
　　채용간헐감압정류법실현료2-갑기필정화2-간을기필정저일열민성혼합물적분리，병고찰료투료조성여조작압력대감압정류과정적영향。결과표명，고진공조건강저료탑부온도종이피면료물료재탑부중수열변성，대우열민물료2-간을기필정，감압정류과정중압력응공제재4325 Pa이하，차시탑부산품2-간을기필정적질량분수균능대우97%，동시수솔능보지재86%이상。재압력위1325 Pa시，불동투료조성하탑정산품2-갑기필정적질량분수화탑부산품2-간을기필정적질량분수균고우98%，량자적수솔야균재85%이상，능구흔호지만족공업생산요구。
2-Picoline and heat-sensitive material 2-ethanolpyridine were separated by batch vacuum distillation. The effects of feed composition and operating pressure on vacuum distillation process were also investigated. The results showed that high vacuum in the column lowering the bottom temperature ensured the feed in the reboiler against the thermal degeneration. The optimal pressure was below 4325 Pa for 2-ethanolpyridine in vacuum distillation process. The mass fraction of 2-ethanolpyridine in the reboiler could be more than 97% and the yield of 2-ethanolpyridine could be over 86% under this condition. When the pressure was 1325 Pa the mass fraction of 2-picoline in the distillate and 2-ethanolpyridine in the reboiler were both up to 98%, with yields above 85%, meeting the requirements of industrial production well.