| NFM-COS复合溶剂萃取精馏分离苯 |
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| 引用本文： | 祝石华,唐文成,田龙胜.NFM-COS复合溶剂萃取精馏分离苯[J].石油化工,2002,31(1):24-27. |
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| 作者姓名： | 祝石华 唐文成 田龙胜 |
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| 作者单位： | 1. 燕山石油化工有限公司,化工一厂,北京,100250
2. 石油化工科学研究院,北京,100083 |
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| 摘 要： | 采用N -甲酰吗啉 (NFM )添加一种助溶剂 (COS)构成复合溶剂作萃取精馏溶剂 ,从裂解加氢汽油苯馏分中回收高纯苯。研究了助溶剂含量、溶剂比等因素对萃取精馏效果的影响 ,适宜的助溶剂质量分数为 5 %～ 2 0 % ,溶剂比为 4 5～ 6 0。采用复合溶剂 ,苯产品收率达到 99 8% ,溶剂回收温度降至 190℃以下 ,与NFM单溶剂萃取精馏工艺相比 ,具有产品质量好、苯收率高、操作苛刻度低的优点
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| 关 键 词： | 萃取精馏 N-甲酰吗啉 助溶剂 苯 |
| 文章编号： | 1000-8144(2002)01-0024-04 |
| 修稿时间： | 2001年3月22日 |
Extractive Distillation Process for Benzene Recovery with NFM-COS Solvent |
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| ZHU Shi-hua ,TANG Wen-cheng ,TIAN Long-sheng.Extractive Distillation Process for Benzene Recovery with NFM-COS Solvent[J].Petrochemical Technology,2002,31(1):24-27. |
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| Authors: | ZHU Shi-hua TANG Wen-cheng TIAN Long-sheng |
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| Affiliation: | ZHU Shi-hua 1,TANG Wen-cheng 2,TIAN Long-sheng 2 |
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| Abstract: | An extractive distillation process for recovering high purity benzene from pyrolysis gasoline was studied.The solvent selected was N -formylmorpholine(NFM) promoted by a co-solvent(COS).The effects on extractive distillation of co-solvent content and solvent/feed ratio were investigated.The best results of separation was obtained at the condition of COS concentration 5%～20% and mass flow rate ratio of solvent/feed of 4 5～6 0 with yield of benzene of 99 8% and solvent recovery temperature less than 190 ℃.It is evident that NFM-COS process had much more advantages as compared with NFM process. |
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| Keywords: | extractive distillation N -formylmorpholine co-solvent benzene |
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