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Distillation with Vacuum

Vacuum distillation. A technique used to gently separate compounds from a liquid. By lowering their boiling point with the help of vacuum.


How does vacuum distillation work?

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. As the liquid components have different boiling points, they evaporate under different operating conditions. And may be removed and recovered successively.
The boiling point of the substances to be separated is lower under vacuum.

Vacuum distillation is therefore the process of choice if the compounds to be separated normally have a high boiling point or are explosive. And allows for separation of substances that would decompose at higher temperatures.

Busch vacuum technology in distillation

For use in distillation processes, we offer a wide range of vapor-tolerant, corrosion-free vacuum solutions. As well as ATEX versions to deal with flammable vapors, gases and liquids. Thanks to our global network, we can also comply with other local explosion protection regulations. Such as Ex-Proof, KOSHA, etc.

Vacuum distillation in the chemical and pharmaceutical industry


Getting pure compounds is the goal of many processes in the chemical and pharmaceutical industry. One of the most commonly used techniques to extract compounds of interest from the reaction mixture is distillation.

Carrying out distillation under vacuum allows for a gentler treatment of heat-sensitive compounds. Thanks to lower process temperatures, the yield of the distillation process can be improved by preventing polymerization, cracking or other product degradation. And significant energy savings can be achieved.

Vacuum distillation is therefore the perfect choice for a wide range of separation processes in the chemical and pharmaceutical industry. From Active Pharmaceutical Ingredient (API) manufacturing or monomer purification to natural compound extraction. As well as for chemical synthesis, the preparation of flavors and aromas and many more.

Matching products

Vacuum distillation in the oil and gas industry


Crude oil distillation

In order to produce petrol, diesel, aviation fuel or heating oil, crude oil must be broken down into its components. This process takes place in oil refineries by means of distillation. As crude oil contains heavier and lighter hydrocarbons with different boiling points, two distillation processes are necessary.

After atmospheric distillation, a second distillation is carried out under vacuum. To separate heavy hydrocarbons at only slightly higher temperatures. This minimizes cracking of components and the creation of unwanted by-products.

Matching products

One of our implemented vacuum distillation systems


Challenging requirements

  • Large volume flow
  • Working pressure of 8 mbar

Our solution
  • 2 stages of vacuum boosters with intercondenser

Products inside the vacuum system

Vacuum distillation of essential oils


Our experience

Capua 1880 uses vacuum technology from Busch Vacuum Solutions for the distillation processes, which are carried out in thin-film evaporators or short-path distillers depending on the type of fruit. All the distillers use only COBRA screw vacuum pumps that are free of operating fluids.

The frequency-controlled vacuum pumps precisely and reliably guarantee the required vacuum level which, together with the temperature, ensures the desired product quality.

Implemented products

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