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| Distillation |
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| Distillation |
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| Distilation |
| The Kettle is filled with liquid mixture and heated. Vapours flows upward in the rectifying column and condenses at the top. Usually, the entire condensate is initially returned to the column as reflux. This contacting of vapour and liquid considerably improves the separation. Generally, this step is named start-up. After some time, a part of the overhead condensate is with drawn continuously as distillate and it is accumulated in the receivers and the other part is recycled in to the column as reflux.Owing to the differing vapour pressure of the distillate, there will be a change in the overhead distillation with time, as early on in the batch distillation the components with a lower vapour pressure will be evaporated first. As the supply of the material is limited and lighter components are removed, the relative fraction of heavier components will increase as the distillation progresses. |
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Food Industries...
