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The Short Path Distillation kit, as an efficient distillation device, is currently for sale.

What is Short Path Distillation?

The short path distillation refers to a kind of evaporation and distillation equipment. As a type of thermodynamic separation technology, the equipment can evaporate components with low boiling points by utilizing that the boiling point of each component in the mixed liquid or liquid-solid mixture is different, and then condense the material to separate the whole components. It is the combination of evaporation and condensation unit operations as well as a kind of liquid-liquid separation technology.

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2L Simple Short Path Distillation Kit

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5L-I Short Path Distillation Kit

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10L–IV Short Path Distillation Kit

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Short Path Distillation of Cannabinoids

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Cheap Complete Short Path Distillation Kit

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Short Path Distillation Kit

Glass Parts of Short Path Distillation

Short path distillation

How Short Path Distillation Works

When the liquid mixture flows along the heating plate and is heated, light and heavy molecules will overflow the liquid surface and enter the gas phase. Due to the different degrees of freedom of light and heavy molecules, different molecules move different distances after overflowing from the liquid surface. If a condensing plate can be properly set up, light molecules reach the condensing plate and be condensed and discharged, while heavy molecules cannot reach the condensing plate and are discharged along the mixed liquid. In this way, the purpose of material separation is achieved.

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Short Path Distillation

Short Path Distillation Kit


Large distillation volume

Heat and high temperature resistance

Good sealing

High transparency

Stable material

Good corrosion resistance

Intelligent temperature control, magnetic stirring

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Application of Short Path Distillation

Short-path distillation is widely used in various aspects of the national economy, especially for the separation of high boiling point and heat sensitive and easy oxide materials. The applications can be concluded as follows.

1. Distillation and concentration.

Short-path distillation techniques are used in natural and synthetic vitamins, wool fatty acids, lanolin, palm oil, rice bran oil, fish oil and cod liver oil, natural plant leaf root extract (such as capsanthin, lycopene, pyrethrin, The application of lecithin, b-carotene, active ingredients of traditional Chinese medicine, etc.

2. Removal of solvent.

With the development of new domestic and international standards and the continuous improvement of people’s living standards, the restrictions on solvent residues in chemical raw materials and their products closely related to human beings such as food, medicine, cosmetics and building materials are becoming more and more strict. Traditional distillation methods have been unable to meet the needs of the market, and this type of process often follows the extraction method as the last quality assurance system for green products.

3. Decolorization and deodorization.

Typical examples are: organic intermediates, lactic acid, fatty acids and derivatives thereof, APG, epoxy resins, epoxidised oils, vegetable waxes, silicone oils, brake fluids, vacuum pump oils, lubricating oils, paraffin oils, and so on.

4. Preparation/production of high-boiling process materials and determination of boiling range.

Short-path distillation technology can achieve distillation separation in a vacuum of 0.001 mbar and a heating time of less than 1 minute, so it is undoubtedly the preferred technology for distillation separation for those heat-sensitive high-boiling substances.

Advantages of Short Path Distillation

  • The short path distillation is quite suitable for heat-sensitive compounds. The distilling temperature used for short path distillation can be much lower than the boiling point of the compound due to it is operated under negative pressure.
  • The short path distillation has a quick heating process. It only requires a few seconds to complete the distillation process, while other conventional distillation apparatuses take hours to complete a distillation.
  • The short path distillation can effectively reduce material waste. The liquid is only need to travel a short distance by adopting short path distillation. Hence less compound is lost during the distillation process.
  • The short path distillation is much easier to use. It can achieve high distillate purity levels without large and complex apparatuses compared to conventional distillation techniques. It means that short path distillation doesn’t require large working spaces.

What is the Difference Between Short Path and Simple Distillation?

Distillation is widely used in the industrial field to extract or purify substances. There are several ways of distillation and the most essential one is simple distillation.

Simple distillation is one single-stage distillation technique that directly condenses the boiled solvents into liquid-phase. Short-path distillation is one of the most classic simple distillation.

In the short-path distillation, sample can get heated and evaporated in the specialized evaporation flask. Then gas-phase extracted solvents will be transferred along the short distance and be condensed into liquid-phase during this distance. Finally, the liquid-phase extracted solvents will go into receiving flask and be collected there. It is convenient for users to take the extracted solvents away from receiving flask.

Short path distillation is very convenient and high-efficiency for users to extract or purify substances.

What is the Process of Short Path Distillation?

1. Molecules diffuse from the main body of the liquid phase to the evaporation surface:
Under normal circumstances, the diffusion rate in the liquid phase is the most important factor to control the molecular distillation rate. The thickness of the liquid layer should be reduced as much as possible and the flow of the liquid layer should be strengthened.
2. Free evaporation of molecules on the surface of the liquid layer:
The evaporation rate increases with the increase of temperature, but the separation factor sometimes decreases with the increase of temperature. Therefore, the thermal stability of the processed material should be taken as the premise, and a more economical and reasonable distillation temperature should be selected.
3. Molecules fly from the evaporation surface to the condensation surface:
In the process of flying from the evaporation surface to the condensation surface, the vapor molecules may collide with each other, or they may collide with the air molecules remaining between the two surfaces. Since evaporation molecules are much heavier than air molecules, and most of them have the same direction of motion, their collisions have little effect on the direction of flight and the speed of evaporation. The residual gas molecules are in chaotic thermal motion between the two sides, so the number of residual gas molecules is the main factor that affects the direction of flight and the evaporation speed.
4. Molecules condense on the condensation surface:
As long as there is enough temperature difference between the hot and cold sides (generally 70~100℃) and the form of the condensing surface is reasonable and smooth, it is considered that the condensing step can be completed in an instant, so it is very important to choose a reasonable condenser form.

Precautions When Using Short Path Distillation

1. Check whether the cooling water inlet and outlet valves are normally opened and the pressure is within the normal range.
2. Check whether the inlet and outlet valves of the cooling water of each component are in an open state.
3. The equipment is heated by hot oil, and the surface temperature of the outer heating body is high. Do not touch it with your hands to avoid burns.
4. Check whether the ethanol in the low-temperature thermostat is sufficient.
5. Pay attention to whether the liquid nitrogen in the liquid nitrogen tank is sufficient.
6. Check whether the connection between the cold well and the equipment is airtight.

How do you Clean the Short Path Distillation?

Ultrasonic cleaner can overcome the shortcomings of traditional cleaning methods and serves as a more effective and environmentally friendly alternative.
The cleaning procedure of the ultrasonic cleaner is as follows:
1. Add water and wetting agent such as dishwashing detergent to the filling pipeline of the ultrasonic cleaner tank.
2. Fill the flask with enough cleaning solution to completely cover the contaminants.
3. Put the bottom of the flask into water without soaking. Trays and clamps can be used to support the flask during the cleaning cycle.
4. Activate the ultrasound. Cavitation passes through the walls of the flask and acts on contaminants.

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