Molecular Distillation (MD), also known as Short Path Distillation, is an advanced technique that enables efficient, high-precision separation and purification. The technology is widely used in many industries such as petroleum, chemical, food and fine chemical.

Traditional distillation technology generally realizes the separation by using the difference of boiling point of different substances, while molecular distillation realizes the separation of substances by using the difference of mean free path of molecular motion and volatility of different substances under high vacuum conditions. Therefore, molecular distillation belongs to non-equilibrium distillation technology.

In the process of molecular distillation, a condensing surface is set between the mean free path of heavy molecules and light molecules, so that the light molecules continue to condense on the condensing surface, while the heavy molecules are distilled along the evaporation surface because they cannot reach the condensing surface, so as to realize the separation of light and recombination fractions.

Imagine a mixture flowing along a heating plate and heating up. The light and heavy molecules in the mixture will escape into the gas phase and move toward the condensing surface. Due to the different mean free paths of light and heavy molecules, light molecules can reach the condensing plate and be expelled by condensation, while heavy molecules cannot reach the condensing plate and continue to discharge along the hot plate.

In the heating process, the mixture flows on the heating plate and gradually heats up.

Escape gas phase: heating causes light and heavy molecules in the mixture to escape into the gas phase.

Condensation discharge: Light molecules can reach the condensing plate and condense discharge due to the short mean free path.

Heavy molecules discharge: Heavy molecules cannot reach the condensing plate due to the long average free path and are discharged along the hot plate.

This separation process not only ensures high efficiency and accuracy of separation, but also enables molecular distillation technology to handle complex mixtures under high vacuum conditions, significantly improving the purification effect.

The unique advantages of molecular distillation technology make it an indispensable means of separation and purification in petroleum, chemical, food and fine chemical industries. Whether it is to improve product purity or achieve efficient separation, molecular distillation technology provides a reliable and efficient solution.