变压精馏分离碳酸二甲酯-甲醇共沸物的稳态模拟

碳酸二甲酯与甲醇形成的共沸物是一种难以分离的物系,采用Wilson热力学模型,通过Aspen Plus流程模拟软件对变压精馏分离碳酸二甲酯-甲醇共沸物的工艺进行稳态模拟优化,优化后的结果为:常压塔(0.1 MPa)实际塔板数为25,进料板位置为5,回流比为1.4;加压塔(1MPa)实际塔板数为34,进料板位置为27,回流比为1.2。优化后碳酸二甲酯与甲醇的回收率均为99.99%。

Steady state simulation for separation of dimethyl carbonate-methanol azeotrope by variable pressure rectification

The azeotropic of dimethyl carbonate and methanol is an inseparable material. In this paper, the steady state simulation optimization of dimethyl carbonate dimethyl carbonate-methanol azeotrope was simulated by the Aspen Plus process simulation software. The optimization result is that the actual stage number of the atmospheric tower (0.1 MPa) is 25, the feeding plate position is 5, and the reflux ratio is 1.4; the actual stage number of the pressure tower (1 MPa) is 34, the feeding plate position is 27, and the reflux ratio is 1.2. The recovery rate of both dimethyl carbonate and methanol was 99.99%.