微量对氯甲苯吸附分离制备高纯度邻氯甲苯  

Preparation of high-purity o-chlorotoluene by adsorptive separation of trace p-chlorotoluene

作　　者：年立春 崔咪芬 陈献 刘定华 汤吉海 乔旭 NIAN Lichun;CUI Mifen;CHEN Xian;LIU Dinghua;TANG Jihai;QIAO Xu(Changzhou Xindong Chemical Development Co.,Ltd.,Changzhou,China;College of Chemical Engineering,Nanjing Tech University,Nanjing,China)

机构地区：[1]常州新东化工发展有限公司,江苏常州 [2]南京工业大学化工学院,江苏南京

出　　处：《中国氯碱》2024年第11期18-23,51,共7页China Chlor-Alkali

摘　　要：采用吸附分离法将PCT从OCT中去除,从而得到高纯度的OCT产品。PCT吸附热力研究表明,PCT在吸附剂上的吸附为自发行为,吸附过程具有熵减的特性,为放热过程。PCT吸附动力学研究显示,拟二级吸附动力学模型可以更好地描述PCT在吸附剂上的吸附动力学行为。间歇吸脱附结果表明,采用的吸附剂在40次的再生循环使用中保持良好的吸附性能,再生的最佳温度为180℃。连续吸脱附结果显示,吸附时最佳的进料流量为0.065 g/min,吸附温度为常温。脱附时最佳的进料流量为0.3 g/min,脱附温度为60℃。吸附后得到的OCT的质量分数可以达到99.95%以上。The adsorptive separation method is used to remove PCT from OCT,thus obtaining a high-purity OCT product.The thermodynamic study of PCT adsorption shows that the adsorption of PCT on the adsor⁃bent is a spontaneous process.The adsorption process has the characteristic of entropy decrease and is an exothermic process.The kinetic study of PCT adsorption shows that the pseudo-second-order adsorption ki⁃netic model can better describe the adsorption kinetic behavior of PCT on the adsorbent.The results of batch adsorption and desorption show that the adopted adsorbent maintains good adsorption performance during 40 regeneration cycles,and the optimal regeneration temperature is 180℃.The results of continuous adsorp⁃tion desorption show that the optimal feed flow rate during adsorption is 0.065 g/min,and the adsorption temperature is normal temperature.During desorption,the optimal feed flow rate is 0.3 g/min,and the de⁃sorption temperature is 60℃.The mass fraction of OCT obtained after adsorption can reach more than 99.95%.

关 键 词：邻氯甲苯 对氯甲苯 吸附热力学 吸附动力学 吸附分离法 

分 类 号：TQ242.1[化学工程—有机化工]