合成氨工艺正丙醇废液精馏处理的工艺技术.pdf

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化
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2013年第32卷第7期
CHEMICAL INDUSTRY AND ENGINEERING PROGRES
1515
研究开发
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合成氨工艺正丙醇废液精馏处理的工艺技术
常秋连
('煤炭科学研究总院北京煤化工分院,北京100013:2因家能源煤炭高效利用与节能减排技术装备重点实验室,
北京100013
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%6
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两醇-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
中图分类号;X701.1
文献标志码:A文章编号:1000-6613(2013)07-1515-04
DOI:10.3969/sn.1000-6613.2013.07.011
Study on distillation treatment of propyl alcohol waste liquor in synthetic
ammonia technolog.
CHANG Qiulian. 2
(Beijing Research Instit e of Coal ems ina Coal Research Institute, Beijing 100013, China; National Energy
Technology Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100013, China)
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 cyclohexane 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
I-propanol-water azeotrope system could be reliable and practicable
Key words: mixed-aicohol wastewater; normal propyl alcohol; azeotropic distillation: entrainer
正丙醇是一种重要的有机溶剂,主要用来做燃进的镍催化剂,得到的粗正丙醇会含较高质量分
料油的杀菌剂、农药及医药原料、香料原料等叫。数的丙酸正丙酯,在精馏时需要向塔内补充大量的
正丙醇生产工艺主要为催化氢化丙醛2?,催化剂为水,正丙醇和水、水和丙酸正丙酯形成最低共沸物
经过活化的镍或钻催化剂,生成的粗丙醇含有少量从塔顶共沸采出,得到质量分数>99.90%的合格产
的水、丙酸正丙酯和二正丙醚等杂质。通过精馏,品。有关含醇共沸物系的提纯,前人已做过大量的
粗正丙醇中的水可以和正丙醇、丙酸正丙酯形成两研究2リ,由于所采用工艺复杂,设备投资、能耗
个二元最低共沸物,从塔顶采出共沸物以后,塔釜
收稿日期:2013-01-07;修改稿日期:2013-04-16
得到合格的正丙醇产品。为提高收率某工艺采用改作者;常秋连(1981-),女,工程师。 E-mail cqlky200om