应用化学 ›› 2023, Vol. 40 ›› Issue (4): 554-561.DOI: 10.19894/j.issn.1000-0518.220302

• 研究论文 • 上一篇    下一篇

氯仿萃取分离NN-二甲基甲酰胺工艺

陈飞越1,2, 苏振宁2, 程全中2, 谭博仁2, 李智永3, 俞小花1(), 王勇2()   

  1. 1.昆明理工大学冶金与能源工程学院,昆明 650093
    2.中国科学院过程工程研究所,中国科学院绿色过程与工程重点实验室,北京 100190
    3.中国电子系统工程第四建设有限公司,石家庄 050051
  • 收稿日期:2022-09-08 接受日期:2023-02-07 出版日期:2023-04-01 发布日期:2023-04-17
  • 通讯作者: 俞小花,王勇
  • 基金资助:
    国家自然科学基金(22178350);国家重点研发计划(2019YFC1907700);云南省万人计划项目(YNWR-QNBJ-2018-327)

Study on Extraction Separation of NN-Dimethylformamide with Chloroform

Fei-Yue CHEN1,2, Zhen-Ning SU2, Quan-Zhong CHENG2, Bo-Ren TAN2, Zhi-Yong LI3, Xiao-Hua YU1(), Yong WANG2()   

  1. 1.Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China
    2.CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
    3.the Fourth Construction Co. Ltd. of China Electronics System Engineering,Shijiazhuang 050051,China
  • Received:2022-09-08 Accepted:2023-02-07 Published:2023-04-01 Online:2023-04-17
  • Contact: Xiao-Hua YU,Yong WANG
  • About author:wangyong@ipe.ac.cn
    85208478@qq.com
  • Supported by:
    the National Natural Science Foundation of China(22178350);the National Key R&D Program of China(2019YFC1907700);Yunnan Ten Thousand Talents Plan Young & Elite Talents Project(YNWR-QNBJ-2018-327)

摘要:

针对某制药企业生产过程中产生的高浓度含NN-二甲基甲酰胺(DMF)料液,在折流板萃取塔内进行连续萃取分离,结合精馏工艺,实现了DMF的分离与回收。对于DMF初始质量分数为38.46%的料液,以氯仿作为萃取剂,采用脉冲折流板萃取塔对料液中的DMF进行萃取,研究了不同油水相比、流量和脉冲条件下在折流板萃取塔中DMF的萃取效果。结果表明,DMF的萃取效率随着脉冲的加入、油水相比的升高和两相流速的增大而增大,在优化的条件下DMF的萃取率最高为99.94%,分离后的萃余相DMF质量分数达到0.5%以下。进一步,对于负载了DMF的氯仿溶液,分别进行了间歇精馏实验和模拟计算,结果显示通过精馏可以实现氯仿和DMF的有效分离回收。

关键词: N, N-二甲基甲酰胺, 氯仿, 折流板萃取塔, 精馏

Abstract:

The separation and recovery of NN-dimethylformamide (DMF) from the liquid containing high mass fraction of DMF is studied by continuous extraction in a pulsed disc and doughnut extraction column (PDDC), which combines with a distillation process. For the feed liquid with 38.46% DMF, chloroform is used as the extraction agent and DMF is extracted in a PDDC. The effects of the extraction operation parameters such as oil-water ratio, flow rate and pulse conditions on the DMF extraction are studied. The results show that the extraction efficiency of DMF increases with the addition of pulsation, the increase of oil-water ratio and the increase of two phase flow rate. Under the optimized conditions, the highest extraction ratio of DMF ias 99.94%, and the DMF mass fraction in raffinate is less than 0.5%. Furthermore, batch distillation experiments and simulation calculations are carried out for the separation of chloroform solution loaded with DMF. The results show that effective separation and recovery of chloroform and DMF can be achieved through continuous distillation.

Key words: N, N-Dimethylformamide, Chloroform, Disc and doughnut extraction column, Distillation

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