Vacuum distillation is a distillation process used for materials that have very high boiling-points or are likely to decompose below their boiling-point. Air is evacuated from the apparatus with a vacuumpump, and the vacuum so formed causes the materials being heated to boil at a temperature lower than they would under normal atmospheric pressure. This enables distillation to take place at lower temperatures. One example of its use is in petroleum refining. Research Vacuum Distillation
A vacuum pump is a device for removing air from laboratory apparatus. The pump may be required because the materials to be handled are air-sensitive or because a low pressure is needed--for example, in vacuum distillation. A reliable vacuum can be obtained using a motor-driven oil pump. For very low pressures, the additional use of a mercury vacuum pump is required, in which a diffused jet of mercuryvapour is injected at the inlet port and drives gas molecules towards the outlet. Another low-pressure pump is the turbo-molecular pump, basically a very high-speed turbine. In a 'getter' pump, a film of some active substance such as titanium is deposited in the evacuation chamber and reacts chemically with any gas molecules present, thus removing them from the chamber. Research Vacuum Pump
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Abbreviations
Research Vacuum Distillation
