“背包式”反应精馏生产乙酸环己酯工艺的模拟研究  

Simulation of “Backpack” reactive distillation process for the production of cyclohexyl acetate

作　　者：许戈[1] 汤吉海[1,2] 陈献[1] 崔咪芬[1] 费兆阳[1,3] 乔旭[1,2,3] Xu Ge Tang Jihai Chen Xian Cui Mifen Fei Zhaoyang Qiao Xu(College of Chemical Engineering, Nanjing Tech University, Nanjing Jiangsu 210009, China Jiangsu National Synergetic lnnovationCenterforAdvaneedMaterials（SICAM）, NanjingJiangsu210009, China State Key Laboratory ofMaterials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing Jiangsu 210009, China)

机构地区：[1]南京工业大学化工学院,江苏南京210009 [2]国家"江苏先进生物与化学制造协同创新中心",江苏南京210009 [3]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《石油化工》2017年第1期50-55,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(21276126;61203020);江苏省"六大人才高峰"项目(2015-XCL-017);江苏高校优势学科建设工程资助项目

摘　　要：采用"背包式"反应精馏集成(DCSR)工艺,对环己烯(CH)与乙酸(AA)加成酯化合成乙酸环己酯(CA)的反应进行研究,固定CH与AA的进料量均为10 kmol/h,规定塔釜产品中CA含量为99.5%(w),以年度总成本(TAC)为评价指标,通过Aspen Plus流程模拟软件考察了主要操作条件及集成结构对DCSR过程的影响。实验结果表明,最佳的工艺条件为:再沸器热负荷(Q_R)为0.51 MW、提馏段塔板数为3、侧反应器台数为2、总催化剂装填量为2 300 kg、催化剂在上下两台侧反应器中的分配系数分别为0.44和0.56。在该条件下,集成过程具有最小TAC约2.82×10~6 Yuan/a,相较于传统工艺,DCSR工艺的Q_R减小近8.9%,催化剂用量减少了42.5%,TAC节省了18.9%。A novel reactive distillation process integrating a distillation column with side reactors（DCSR） was proposed for the production of cyclohexyl acetate through the additive esterification of cyclohexene and acetic acid. Aimed at the reduction of the total annual cost（TAC）,when the feeding rates of both cyclohexene and acetic acid were 10 kmol/h and the mass fraction of cyclohexyl acetate in the column bottom was stipulated as 99.5%（w）,the effects of operating conditions and the integration structure on the esterification were investigated by means of the Aspen Plus process simulation software. The results indicated that,under the opt imal DCSR process conditions of reboiler duty 0.51 MW,the stripping section plates number is 3,number of side reactors 2 and catalyst loading 2 300 kg with a distribution coefficient of 0.44/0.56,TAC was 2.82×10~6 Yuan/a,lower than that of the traditional reaction-separation process. Comparison to the traditional reactionseparation process,the reboiler duty,catalyst loading and TAC of the DCSR process decreased by 8.9%,42.5% and 18.9%,respectively.

关 键 词：反应精馏 侧反应器 酯化 模拟 乙酸环己酯 

分 类 号：TQ021.8[化学工程]