When it comes to distillation methods, understanding the difference between wiped film and thin film distillation is crucial.
Both techniques are used for processing thick and sticky liquids, but they have distinct applications and methods.
4 Key Points to Understand the Difference Between Wiped Film and Thin Film Distillation
1. General Application of Thin Film Distillation
Thin film distillation is a method used to process liquids like raw and essential oils, polymers, fats, and some dairy products.
This method allows manufacturers to purify these substances by using low evaporation temperatures and vacuums.
The process involves depositing a thin film of the liquid onto a heated surface, where it is then evaporated and condensed.
This separation helps in removing impurities and retaining the desired components.
2. Specific Application of Wiped Film Distillation
Wiped film distillation is a specific type of thin film distillation.
It is commonly used for purifying oils, fats, and other substances.
In this method, a thin film of the liquid is created on the inner surface of a rotating cylindrical vessel.
The film is continuously wiped or spread across the surface by rotating wiper blades or rollers.
This ensures efficient heat transfer and evaporation, leading to higher throughput and better separation efficiency.
3. Efficiency and Throughput
Wiped film distillation offers higher efficiency and throughput compared to other thin film distillation methods.
The continuous wiping action ensures that the film remains thin and uniform, enhancing the separation process.
4. Summary of Differences
Thin film distillation is a general term for a method used to process thick and sticky liquids using low evaporation temperatures and vacuums.
Wiped film distillation is a specific type of thin film distillation that involves the creation of a thin film on a rotating surface.
This results in higher efficiency and throughput, making it a preferred method for many applications.
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