| 摘要: |
| 利用萃取等方法处理原料,有效地减轻了塔堵塞和共沸夹带过多的问题。采用常-减压精馏相结合的方法对聚缩醛二甲醚进行了分离,得到了各产物分离的较佳工艺条件。实验中得到了纯度(质量分数)分别为99.06%的甲缩醛、97.81%的二聚产物、99.68%的三聚产物以及99.62%的四聚产物,为工业化分离提纯聚缩醛二甲醚提供了基础依据。 |
| 关键词: 萃取 聚缩醛二甲醚 分离 精馏 |
| DOI：10.3969/j.issn.1007-3426.2015.05.011 |
| 分类号:TQ420.6 |
| 基金项目: |
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| Study on separation of a new diesel fuel additive polyoxymethylene dimethyl ethers |
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Hu Guoqing, Tian Hengshui, Wei Yongmei, Huang Jie
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(College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
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| Abstract: |
| The raw material was treated by extraction, which effectively reduced the tower plugging and azeotropic entrainment. Polyoxymethylene dimethyl ethers (PODE) were separated by atmospheric-vacuum rectification and the optimal technical conditions of each product separation were achieved. In the experiment, the purity of each product reached methyl 99.06%, PODE2 97.81%, PODE3 99.68%, and PODE4 99.62%, which could provide an experimental basis for industrial purification of polyoxymethylene dimethyl ethers. |
| Key words: extraction polyoxymethylene dimethyl ethers separation rectification |
