Separation of acetic acid and water by complex extractive distillation
Separation of acetic acid and water by complex extractive distillation
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DOI：
10.1016/s1383-5866(03)00208-9
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发表时间：
2004-04
影响因子：
8.6
通讯作者：
Zhigang Lei;Chengyue Li;Yingxia Li;Biaohua Chen
中科院分区：
文献类型：
--
作者：
Zhigang Lei;Chengyue Li;Yingxia Li;Biaohua Chen
本工作提出了一种新的分离方法——复杂萃取精馏来分离乙酸和水。选择三丁胺作为分离剂。通过红外光谱（IR）和质谱（MS）技术验证了乙酸和三丁胺之间的可逆化学相互作用。分别建立了包含和不包含化学平衡方程的平衡（EQ）阶段的数学模型来模拟萃取精馏塔。通过模拟结果与实验观察结果的比较，得出结论：无论是否引入化学平衡方程，EQ阶段模型都是准确的，因为在操作条件下化学平衡常数较小。
A new separation method, complex extractive distillation, was put forward in this work for separating acetic acid and water. Tributylamine was selected as the separating agent. The reversible chemical interaction between acetic acid and tributylamine was verified through infrared spectra (IR) and mass chromatogram (MS) technique. The mathematics models of equilibrium (EQ) stage with and without incorporating chemical equilibrium equations were, respectively, established to simulate the extractive distillation column. From the comparison of simulated results with experimentally observed results, it was concluded that the EQ stage model was accurate whether chemical equilibrium equation was incorporated or not because the chemical equilibrium constant was small under the operation condition.