Wiped film molecular distillation is a process used to separate volatile components from non-volatile components in thermally sensitive materials.
It is particularly effective for high production and high throughput scenarios.
This method involves the creation of a thin film of the material on a heated surface.
It is enhanced by the use of rotating scrapers that continuously renew the film.
This improves heat transfer and evaporation efficiency.
Mechanism of Wiped Film Molecular Distillation
The process begins by introducing the feed liquid into a heated cylindrical vacuum chamber.
Here, specially designed wipers, often set at a 45° diagonal, scrape the material down the heated wall.
This creates a thin film.
This action is crucial as it not only controls the thickness of the film but also ensures short and controlled material residence times.
The scraping motion actively mixes the material, promoting efficient heat transfer and material transport.
4 Key Advantages of Wiped Film Distillation
1. Enhanced Heat Transfer
The thin film created by the wipers allows for excellent heat transfer, even with highly viscous fluids.
This is because the thin film maximizes the surface area in contact with the heat source, facilitating rapid evaporation.
2. Reduced Thermal Stress
By operating under vacuum conditions, the boiling point of the material is lowered.
This reduces thermal stress and the risk of breakdown or cracking of thermally sensitive components.
3. Continuous Operation
Unlike some other distillation methods, wiped film distillation can operate in continuous modes.
This makes it suitable for high production scales and throughput.
4. Versatile Applications
Originally used in the refinement of petroleum oils, wiped film distillation has found significant application in the cannabis industry for the production of distillate.
The technology has evolved to include sophisticated temperature control units, enhancing its performance and applicability across various industries dealing with thermally sensitive materials.
Applications and Evolution
Wiped film molecular distillation is a highly efficient method for separating components in a gentle manner.
It is particularly suited for materials that are sensitive to heat.
Its ability to handle high volumes and its effectiveness in reducing thermal stress make it a preferred choice in many industrial applications.
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