Vacuum distillation or distillation under reduced pressure is a type of distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in their boiling points.

Vacuum Distillation Procedure. A vacuum distillation apparatus is shown in Figure 5.50, using a simple distillation setup. A fraction distillation can also be used. It is assumed that readers have previously performed a simple distillation under atmospheric pressure, so in this section are described differences between atmospheric and reduced ...

Vacuum Distillation works on the principle of simple distillation with few changes. According to this method, the desired liquid is distilled at a temperature lower than its boiling point by the application of vacuum. When vacuum is applied, it means that the pressure above the liquid surface is lowered which enhances the rate of distillation.

Vacuum distillation is an important process in the chemical and pharmaceutical industry. But it is employed in many other sectors, too. For example, in beverage and food production to extract plant essences, or to separate long-chain hydrocarbons in oil refineries. Distillation is commonly used to separate the components of a liquid mixture.

A vacuum distillation apparatus can be constructed from a simple distillation setup although a fraction distillation can also be used. It is assumed that readers have previously performed a simple distillation under atmospheric pressure, so in this section are described differences between atmospheric and reduced pressure distillations.

2022年7月19日 · Vacuum distillation is the ideal separation method for liquid mixtures with very high boiling points (> 150 °C) and for components in the mixture that decompose when heated under atmospheric pressure. This unit operation is performed at a pressure below atmospheric level which is done by lowering the pressures in the column through a steam ejector.

Vacuum sources: Water aspirator. The principle of operation is the Venturi principle: motion of water past a narrow opening creates low vacuum. There are several aspects to its operation to remember: Have the maximum possible water flow (for the optimum vacuum). Changes in water flow will cause a change in the ultimate vacuum generated.

2024年12月27日 · The vacuum distillation apparatus typically includes a distillation flask, a vacuum source, and a condenser. By creating a vacuum in the distillation flask, the boiling points of the components in the mixture are effectively lowered, facilitating their separation.

An ASTM D1160 (ISO 6616) vacuum distillation apparatus for the distillation of petroleum products and biodiesel. All models conform to ASTM D1160. The fully-automatic D1160 features fully automatic control from a PC along with standard ASTM glassware.

2024年4月22日 · Vacuum distillation is a technique for the purification or separation of liquids or solvents with a boiling point above 150 ºC, or with a lower boiling point but which are thermally unstable. Vacuum pumps can be used as a vacuum source.