Knowledge What is Low Temperature Evaporation Technology? (4 Key Points Explained)
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Tech Team · Kintek Solution

Updated 3 months ago

What is Low Temperature Evaporation Technology? (4 Key Points Explained)

Low temperature evaporation technology is a set of processes that use reduced pressures to facilitate the evaporation of liquids at temperatures significantly lower than their normal boiling points.

This technology is particularly beneficial for thermally sensitive materials.

It minimizes the risk of thermal decomposition, polymerization, or other undesirable reactions.

1. Mechanism of Low Temperature Evaporation

What is Low Temperature Evaporation Technology? (4 Key Points Explained)

The core principle behind low temperature evaporation is the relationship between the vapor pressure of a liquid and its boiling temperature.

By reducing the surrounding pressure, the vapor pressure required for boiling is also lowered.

This allows the liquid to evaporate at a lower temperature.

This is achieved through the use of vacuum pumps, which create a high vacuum environment.

In this environment, the liquid can be heated to a temperature well below its normal boiling point.

This facilitates evaporation without the risk of thermal degradation.

2. Types of Low Temperature Evaporation

2.1 Short Path Distillation

This method uses a high vacuum to distribute the material uniformly on a heating surface.

It reduces the pressure difference across the liquid surface.

The volatile components evaporate and are condensed in a separate condenser.

This process is efficient and maintains high product quality with minimal decomposition.

2.2 Centrifugal Evaporation

This method is used for evaporating multiple liquid solvents at low temperatures.

It employs a vacuum pump to support solvent boiling under a vacuum, keeping the samples cold.

The solvent boils from the surface downwards, reducing the risk of solvent bumping and cross-contamination.

2.3 Vacuum Evaporation

This technique is employed for liquids adversely affected by high temperatures.

By reducing the boiling temperature through reduced pressure, vacuum evaporation allows for gentle processing of heat-sensitive products.

3. Benefits for Thermally Sensitive Products

Low temperature evaporation is particularly advantageous for products that are sensitive to heat, such as plant-based or animal-based oils.

These products can be distilled in a fine vacuum at high evaporation rates.

This ensures a gentle process that preserves the integrity and quality of the product.

The reduced evaporation temperatures achieved through this technology allow even sensitive organic substances like biodiesel to be separated without degradation.

4. Economic Considerations

The use of vacuum evaporation not only preserves the quality of the product but also reduces the energy requirements for heating.

This leads to lower operating costs.

Mechanical vacuum pumps, while initially more expensive, tend to be cheaper in the long run compared to other methods like steam jet ejectors.

Continue exploring, consult our experts

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