摘要
针对丙烯酸与异丁烯酯化加成反应具有反应温度较低、精馏温度较高的特点,文中设计了加压较低温度反应-减压较高温度精馏集成的“背包式”反应精馏生产丙烯酸叔丁酯新工艺。以年度总成本(TAC)为目标,采用序贯优化法对过程工艺参数进行优化设计。规定新鲜丙烯酸进料量为10 kmol/h,塔顶产品中丙烯酸叔丁酯质量分数不低于98%,新鲜丙烯酸转化率达到99%,得到最佳过程配置参数和操作参数:侧反应器台数为2,进入侧反应器1(R1)的侧线采出量为10 kmol/h,进入侧反应器2(R2)的侧线采出量为5 kmol/h,以及催化剂总装填量为200 kg且分配比为0.7/0.3,总塔板数为28块(包括冷凝器和再沸器),精馏段塔板数为15块,侧反应器进出口间隔塔板数为5,回流比为0.64,此时TAC最小为1.439×10^(6)元/a。
A side-reactor column(SRC)configuration process was proposed for the synthesis of tert-butyl acrylate(TBAc)via the additive esterification of acrylic acid(AA)with isobutene(IB),which adopted the integration of high-pressure low-temperature reaction and low-pressure high-temperature distillation due to the physicochemical properties of reactants and product.Taking the annual total cost(TAC)as the objective function,the operating and structural parameters were optimized by the sequential optimization method.It is stipulated that the feed rate of fresh acrylic acid is 10 kmol/h,the conversion rate reaches 99%,and the mass fraction of tert-butyl acrylate is over 98%.The results show that the minimum TAC is 1.439×10^(6) CNY/a when the number of side reactors is 2,the flow rates from distillation columns to R1 and R2 are 10 and 5 kmol/h,the total catalyst amount is 200 kg,the distribution coefficient between R1 and R2 is 0.7/0.3,the total stage number is 28,the rectification stage number is 15,the interval stage number between inlet and outlet of the side reactor is 5,and reflux ratio is 0.64.
作者
王琼
张国雯
汤吉海
张竹修
崔咪芬
陈献
乔旭
WANG Qiong;ZHANG Guo-wen;TANG Ji-hai;ZHANG Zhu-xiu;CUI Mi-fen;CHEN Xian;QIAO Xu(State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Technology University,Nanjing 210009,Jiangsu Province,China;Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing 210009,Jiangsu Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2021年第8期7-11,17,共6页
Chemical Engineering(China)
基金
国家重点研发计划项目(2017YFB0307304)
国家自然科学基金资助项目(21676141)。
