Abstract: Azeotropic distillation technology was used to treat industrial mixed-alcohol wastewater coming from ammonia synthesis. Using this technology and taking a feasible azeotropic agent，the distillation experiment of 1-propanol-water azeotrope system was conducted in batch distillation column. The operating condition of treating industrial mixed alcohol waste water was optimized. The results indicated that using this technology and taking cyclohexane as azeotropic agent，1-propanol in raw material could be purified from 20%～40% to ≥95%，and cycloihexane entrainer at the tower top could be purified to ≥97%. This technology greatly reduced equipment investment and energy consumption. The experimental results showed that using azeotropic distillation for separation of 1-propanol - water azeotrope system could be reliable and practicable.

Key words: mixed-alcohol wastewater, normal propyl alcohol, azeotropic distillation, entrainer

摘要： 采用共沸精馏技术处理合成氨工艺流程中脱碳工段产生的含大量正丙醇混醇废液。本文采用共沸精馏的方法，选用合理可行的共沸剂，在间歇精馏塔内进行正丙醇-水共沸物系的分离实验，优化了该共沸精馏技术处理工业混醇废液的最佳操作条件。结果表明：采用共沸精馏方法，以环己烷为共沸剂，可使原料液中20%～40%的正丙醇含量提纯至质量分数≥95%，塔顶回收的共沸剂质量分数≥97%。该工艺流程较大地减小了设备投资和能耗。实验表明采用共沸精馏技术用于正丙醇-水共沸物系的分离具有可靠性和实用性。

关键词: 混醇废液, 正丙醇, 共沸精馏, 共沸剂