Separation of 1-naphthol+2-naphthol mixture and dodecanol+decanol mixture by distillative freezing process
碩士 === 長庚大學 === 化工與材料工程研究所 === 94 === Distillative Freezing process (hereinafter called DF process) is a new separation technique. Basically, DF is operated at triple point condition, in which the liquid mixture is simultaneously vaporized and solidified due to the three-phase equilibrium. It result...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
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| Online Access: | http://ndltd.ncl.edu.tw/handle/02411390808582823644 |
| Summary: | 碩士 === 長庚大學 === 化工與材料工程研究所 === 94 === Distillative Freezing process (hereinafter called DF process) is a new separation technique. Basically, DF is operated at triple point condition, in which the liquid mixture is simultaneously vaporized and solidified due to the three-phase equilibrium. It results in the formation of pure solid and liquid phase and vapor phase of mixtures. As the DF process is conducted under an adiabatic condition, the latent heat released in forming the solid crystals is mostly removed by vaporizing portions of liquid mixtures. The process is continued until the liquid phase is completely eliminated and only the pure solid crystals remain in the feed. DF is applied here to separate the 1-naphthol+2-naphthol mixture. The experiments show that four batch DF operations are required to purify 1-naphthol from 90% to >99% from the 1-naphthol-enriched mixture. On the other hand, five batch DF operations are required to purify 2-naphthol from 90% to >99% from the 2-naphthol-enriched mixture. However, it is found that DF can not be applied to separate dodecanol from the dodecanol+decanol mixture.
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