Separation of triethoxysilane from tetraethoxysilane by batch distillation in a packed column
| Autor: | Hoey Kyung Park, Hyeyun Jeong, Yun Jae Lee, Jungho Cho, Kyun Young Park, Tae Won Kang, Dong-Sun Kim |
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| Rok vydání: | 2016 |
| Předmět: |
Fractional distillation
Packed bed Chromatography Batch distillation Vacuum distillation General Chemical Engineering Condensation Analytical chemistry Continuous distillation 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Triethoxysilane 0210 nano-technology Distillation |
| Zdroj: | Korean Journal of Chemical Engineering. 33:2418-2425 |
| ISSN: | 1975-7220 0256-1115 |
| DOI: | 10.1007/s11814-016-0084-8 |
| Popis: | A batch distillation of a crude tetraethoxysilane containing 8mol% triethoxysilane was performed in a glass packed column, 2.54 cm in diameter and 1m in height. Two distillate rates, 3.0mL/min and 6.0mL/min, were used and the reflux ratio was varied up to 3.0. Experimental data were compared with predicted values by Pro/II, a process simulator widely used in the chemical industry. The differential condensation of the vapor in the packed column due to heat losses from the vapor to the column internals and to the surroundings affected the separation efficiency seriously so that a considerable discrepancy was observed between experimental data and prediction by Pro/II in which such heat-loss effects are unaccountable. A model was developed to explain the effect of the differential condensation. For a larger distillation unit scaled up by 100 times where the heat-loss effect is regarded to be minimal, Pro/II simulations were performed to produce 99.9% TEOS with varying reflux ratio, number of stage, and feed composition. |
| Databáze: | OpenAIRE |
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