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What You Need to Know About Short Path Distillation

Claudia Humphrey 16/03/2020

For you to know how to choose the right molecular distillation equipment, you need to have a better understanding of the process. Distillation is a process of separating the components of a liquid. It involves selective heating and cooling, and there are many instruments used in this process to manipulate the thermodynamic characteristics of the fluid. The mixtures are boiled until each component reaches its evaporation point and then condensed to go back to liquid form. This process has been used for long, and it has very many applications, especially water purification. Short path distillation is done on a shorter path; generally, some centimeters and the pressure is usually reduced compared to ordinary distillation.

What Is Short Path Distillation?

It is distillation where the liquid being separated travels only a few centimeters. This technique is typically used for small quantities or for compounds that get unstable at high temperatures. When you reduce the pressure, you also decrease the temperature at which the compounds boil. This also makes the temperature at which you are heating go lower than the liquid’s boiling point at standard pressure. The distillate then only travels a short distance before condensation. You can find apparatus for this process in many places.

Application


This process can be used to do many things. This includes the production of lactic acid, omega three fatty acids, monomers, monoglycerides, and paraffin wax. Other than these, it can also be used in cannabis oil distillation. The process was developed in the ‘30s and ‘40s and has been primarily used since then. When the vapor is released from the liquid, it does not get any more contact with it. An evaporator first distills off a fraction that can meet the quality standards but remains a poor yield because most a lot of the light fraction stays in the residue. What remains is then re-distilled to remove the light fraction. The whole mixture is then returned into the first evaporator.

Benefits

Short path distillation is advantageous because it does not need very many instruments as compared to ordinary distillation. It can do proper distillation for compounds that do not like very high temperatures. If you want to distill a small quantity of liquid, short path distillation is the best process to use. For ordinary distillation, you will need a larger number of apparatus and also apparatus that are larger, and this could be hard to find or expensive when found.

If you are not planning to work with large quantities of compounds that require low heat, this is the best method to use. With short path distillation, you can achieve up to 99% purity in a small working space.…

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