Abstract:

This paper uses Aspen Plus software to carry out steady?state simulations of a new process for the reactive distillation of hydrogen peroxide isopropylbenzene (CHP) and subsequent refining processes for phenol and acetone. The operating pressure, feed position and number of plates of the reactive distillation column and the refining process were economically optimised with the objective of minimising the total annual cost (C_TAC). The results show that the optimal operating parameters of the process are as follows : the total number of trays of RD was 34, the number of trays in the distillation section was 27, the number of trays in the reaction section was 6, the feed position was 28, and the operating pressure was 3.0×10⁴ Pa. The total plate numbers of acetone refining tower (T101), cumene top tower (T102), tar tower (T103) and phenol refining tower (T104) were 25, 61, 23 and 22, respectively. The feed positions are 16, 45, 9 and 9, respectively. The operating pressures were 5.2×10⁴, 5.0×10³, 5.5×10⁴, 6.0×10³ Pa. The minimum C_TAC of the new process was 2 239.03×10⁴ yuan/year. At the same time, the steady?state simulation and economic optimization of the traditional CHP decomposition and subsequent phenol and acetone refining process were also carried out, and the minimum C_TAC value was 2 608.13×10⁴ yuan/year. By comparing the reactive distillation process with the traditional process, it can be seen that C_TAC can save 14.15% and energy consumption can save 9.01%.

Key words: Hydrogen peroxide isopropylbenzene (CHP), Reaction distillation, Total annual cost, Aspen Plus

摘要：

采用Aspen Plus软件对反应精馏分解过氧化氢异丙苯（CHP）的新工艺以及后续苯酚、丙酮的精制工艺流程进行了稳态模拟。以年度总成本（C_TAC）最小为目标函数，对反应精馏塔（RD）及精制工艺流程的操作压力、进料位置及塔板数等进行了经济优化。结果表明,工艺的最优操作参数：RD的总塔板数为34块，精馏段塔板数为27块，反应段塔板数为6块，进料位置为第28块，操作压力为3.0×10⁴ Pa；丙酮精制塔（T101）、异丙苯拔顶塔（T102）、焦油塔（T103）和苯酚精制塔（T104）的总塔板数分别为25、61、23、22块，进料位置分别为第16、45、9、9块，操作压力分别为5.2×10⁴、5.0×10³、5.5×10⁴、6.0×10³ Pa，此时新工艺流程的C_TAC最小值为2 239.03 万元/a。同时，对传统CHP分解和后续苯酚、丙酮精制工艺进行了稳态模拟及经济优化。结果表明，其C_TAC最小值为2 608.13 万元/a。对比反应精馏工艺与传统工艺流程可知，C_TAC可节省14.15%，能耗节省9.01%。

关键词: 过氧化氢异丙苯, 反应精馏, 年度总成本, Aspen Plus