On what distillation means as follows:

Distillation is a thermodynamic separation process, which uses the different boiling points of the components of a mixed liquid or liquid-solid system to evaporate the low-boiling component, and then condense in order to separate the whole component of the unitary operation process, which is a combination of two unitary operations: evaporation and condensation. Compared with other means of separation, such as extraction, filtration crystallization, etc., its advantage is that it does not require the use of other solvents other than the system components, so as to ensure that no new impurities will be introduced.

The process by which a liquid is converted to vapor and condensed back to liquid is called distillation. The liquid that is vaporized is called the distillate, and the original liquid is called the distillate. Distillation is a combination of evaporation and condensation.

Generally the purpose of distillation is to purify a substance or a mixture of substances within the separation. Such as distilled water is to remove non-volatile impurities in water by distillation, and petroleum by distillation can be refined gasoline, diesel, fuel oil and lubricating oil. Distillation is widely used in chemical analysis, laboratory research and manufacture of many chemical products.

Expanded knowledge:

1, Distillation (Distillation)

The process of heating a mixture of liquids to a boil so that they become vapors, and then condensing them into a liquid.

Distillation is one of the most common methods of separating and purifying liquid organic compounds. It can also be used as a method of identifying organic matter and determining the purity of a substance.

2, fractional distillation (fractionaldistillation)

Basic principle is similar to distillation. The difference is that there is more than one fractionation column on the device, the use of fractionation column so that the process of vaporization and condensation from a time to improve for a number of times. Simply put, fractional distillation is a multiple distillation.

3, distillation and fractional distillation difference:

It is an important method of separation and purification of liquid organic compounds. Distillation is mainly used for the separation of two or more boiling point difference between the liquid mixture (at least 30 ℃ or more), and fractionation is the separation and purification of boiling point difference between the liquid mixture, now the most sophisticated fractionation equipment has been able to boiling point difference of 1 to 2 ℃ of the mixture apart. Fractional distillation has been widely used in the laboratory and chemical industry.