Short Path Molecular Distillation Wiped Film Evaporator
Understanding Molecular Distillation
Definition and Process: Molecular distillation is a specialized technique used for distilling heat-sensitive compounds with high boiling points. It operates under vacuum conditions, allowing for low-temperature distillation. By utilizing the variance in molecular weights and volatility, it enables the separation of different components present in a mixture.
Advantages and Applications: Molecular distillation offers several advantages over conventional distillation methods. Due to the reduced operating pressures, it significantly lowers the chances of thermal degradation and oxidative reactions. With its ability to handle temperature-sensitive materials, this technique finds applications in various industries such as pharmaceuticals, food processing, essential oil extraction, and more.
Quick Details
Molecular distillation is a distillation method operated under high vacuum, where the average free path of the vapor molecules is greater than the distance between the evaporating surface and the condensing surface.Thus, the liquid mixture can be separated by the difference of evaporation rate of each component in the feed liquid. At a given temperature, the lower the pressure, the greater the average free path of the gas molecules.When the pressure in the evaporation space is very low (10-2 ~ 10-4 mmHg) and the condensation surface is close to the evaporation surface, and the vertical distance between them is less than the average free path of the gas molecules, the vapor molecules vaporized from the evaporation surface can directly reach the condensation surface without colliding with other molecules and condense.
| Effective evaporation area： | 0.15 |
| Key Selling Points: | Easy to Operate |
| Rotating Speed: | 600 |
| Machine type: | Short Path Distiller |
| Power: | 250 |
| Material: | 3.3 borosilicate glass |
| Process: | Vacuum Distillation |
| After Warranty Service: | Online support |
Product Attribute
| Model | SPD-80 | SPD-100 | SPD-150 | SPD-200 |
| Feed Rate(kg/hr) | 4 | 6 | 10 | 15 |
| Effective evaporation area(m²) | 0.1 | 0.15 | 0.25 | 0.35 |
| Motor Power(w) | 120 | 120 | 120 | 200 |
| Maximum Speed(rpm) | 500 | 500 | 500 | 500 |
| Barrel Diameter(mm) | 80 | 100 | 150 | 200 |
| Feeding Funel Volume(l) | 1 | 1.5 | 2 | 5 |
| Dimension (mm) | 2120*1740*628 | 2120*1740*628 | 2270*1940*628 | 2420*2040*628 |
| Inernal Condenser Area(m) | 0.2 | 0.3 | 0.4 | 0.5 |
| Distillate Receiving Vessel Volume(l) | 1 | 2 | 5 | 10 |
| Residue Receiving Vessel Volume(l) | 1 | 2 | 5 | 10 |
| Wiper | PTFE scraper | PTFE scraper | PTFE scraper | PTFE scraper |
Product features
1: High evaporation efficiency can reduce retention time with minimal time delay.
2: Short path distillation is made of 3.3 high borosilicate glass and PTFE, which has excellent corrosion resistance.
3: Main body of short path distillation is made of 3.3 high borosilicate glass , allowing the whole process to be observed very clearly.
4: High precision distillation barrel allows the liquid to form a complete and unifiedthin film on the heated surface. The smooth inner surface can avoid stick and scalin.
5: Frequency conversion deceleration motor with selfcooling fan, long time continuous working.
6: Magnetic force transmission can make film forming system separated from motor, the top sealing of distillation barrel have no drive rod pass through.The whole system performs a completed sealing. The minimumvacuum pressure is up to0.1Pa.
7: Highest temperature of the system can reach 230℃/300℃, accurate temperature control can be realized.
8: Scraper model and self-cleaning roller model film forming system are available.
Introducing Wiped Film Evaporator
Purpose and Operation
A wiped film evaporator is an essential component of molecular distillation systems. It facilitates the formation of a thin liquid film on the evaporator surface, improving heat transfer efficiency. As the liquid moves down, the evaporator's rotor continuously wipes it off, ensuring a fresh surface for uniform evaporation.
Key Components
A typical wiped film evaporator consists of three main components: the evaporator body, the condenser, and the distribution system. The evaporator body contains the heating jacket and the rotor. The condenser condenses the vaporized material, converting it back into a liquid. The distribution system ensures an even distribution of material across the evaporator surface.
Benefits
Wiped film evaporators offer several benefits that make them ideal for molecular distillation. The thin liquid film allows for shorter residence times, reducing the chances of thermal degradation further. The continuous wiping action prevents the buildup of foulants, increasing efficiency. Additionally, their compact design and versatile operating ranges make them suitable for a wide range of applications.
Short Path Molecular Distillation
Overview and Principles
Short path molecular distillation is a specialized variant of molecular distillation. It differs from the traditional method by employing a short condenser and a high vacuum environment. This setup minimizes the distance the vapor has to travel, reducing the pressure drop and improving separation efficiency. It is particularly effective for separating compounds with similar boiling points.
Advantages over Traditional Distillation
Short path molecular distillation offers several advantages over traditional distillation techniques. By minimizing the pressure drop, it prevents excessive thermal stress on the compounds, preserving their integrity. It also allows for faster distillation, higher purity, and the ability to process heat-sensitive materials more efficiently, thus appealing to industries requiring high-quality products.
Factors Affecting Distillation Efficiency
To achieve optimal distillation performance, several factors need careful consideration and management. Let's explore some of these critical factors.
Temperature and Pressure Control
Precise temperature and pressure control are essential to maintain the desired separation efficiency. Controlling the evaporator and condenser temperatures ensures favorable conditions for the separation process. Similarly, maintaining the correct pressure inside the system aids in achieving the desired boiling points and minimizes thermal stress on the compounds.
Feed Composition and Flow Rate
The composition of the feed material plays a crucial role in the distillation process. It is important to understand the composition and behavior of the mixture to optimize the process parameters accordingly. Additionally, controlling the flow rate ensures an appropriate residence time, allowing for effective separation.
Equipment Maintenance
Regular maintenance of the distillation equipment is crucial for consistent performance. Ensuring clean and well-maintained surfaces promotes efficient heat transfer and prevents fouling. Regular inspections, cleaning, and calibration of the system components contribute to a longer lifespan and reliable operation.
Optimizing Distillation Performance
To maximize the effectiveness of short path molecular distillation wiped film evaporators, certain key considerations should be taken into account throughout the distillation process.
Pre-distillation Preparation
Prior to distillation, proper preparation of the system is vital. Cleaning and drying the equipment, ensuring the absence of contaminants, and calibration of temperature and pressure gauges are essential steps. Ensuring an appropriate feed composition and flow rate is also crucial for optimal performance.
Proper Heating and Cooling Techniques
Accurate and controlled heating and cooling techniques are pivotal for successful distillation. Precise temperature control throughout the process aids in achieving the desired separation efficiency and maintaining the integrity of the compounds being distilled. Proper insulation and efficient cooling systems prevent temperature fluctuations and facilitate condensation.
Post-Distillation Considerations
After distillation, it is important to handle the separated components appropriately. Proper storage conditions, avoiding exposure to light and air, ensure the stability and quality of the distilled materials. Carefully cleaning the equipment and maintaining it in optimal condition guarantees consistent performance in future distillation operations.
Notable Applications of Short Path Molecular Distillation Wiped Film Evaporators
Short path molecular distillation wiped film evaporators find extensive application in industries where high purity and precise separation are paramount. Some notable applications include the production of pharmaceutical isolates, refining of precious oils and extracts, production of high-potency cannabis concentrates, and the creation of specialty chemicals requiring stringent purity standards.
Safety Considerations during Distillation
Safety is of utmost importance when working with short path molecular distillation wiped film evaporators. Adhering to proper safety protocols ensures the well-being of operators and the integrity of the operation.
Proper Protective Equipment
Operators should wear appropriate safety equipment, including gloves, safety glasses, and lab coats, to protect against potential hazards. Proper ventilation systems and fume hoods should be in place to ensure effective gas removal during the distillation process.
Safe Handling of Chemicals
Careful handling and storage of chemicals are critical for maintaining a safe working environment. Operators should be trained on proper chemical handling procedures, including the use of suitable containers, avoiding spills, and understanding the properties and hazards of the materials being used.
Common Troubleshooting Tips
Despite careful planning and execution, issues may arise during the distillation process. Below are some common troubleshooting tips to address potential hurdles.
Addressing Equipment Malfunctions
In the event of equipment malfunctions, such as leaks or temperature fluctuations, it is crucial to address them promptly. Regular maintenance and calibration help minimize the occurrence of such issues. In case of malfunctions, it's best to consult the equipment manual or contact a technical expert for assistance.
Resolving Common Distillation Issues
Various distillation issues can occur, such as poor separation, low purity, or irregular flow rates. Proper identification of the issue and troubleshooting steps can help overcome these challenges. Adjusting temperature and pressure parameters, optimizing flow rates, or revisiting the feed composition may resolve many common problems.
Short path molecular distillation wiped film evaporators have revolutionized the separation and purification of substances, offering enhanced efficiency and superior performance over traditional methods. By understanding the principles, advantages, and proper optimization techniques, industries can harness the power of this cutting-edge technology to produce high-quality products and meet stringent purity standards.
FAQs
1: Can short path molecular distillation be used for liquids with high viscosity?
Yes, short path molecular distillation, in combination with wiped film evaporators, is particularly suitable for processing liquids with high viscosity, such as resins, polymers, and waxes.
2: Is molecular distillation only used for separating heat-sensitive compounds?
While molecular distillation is particularly advantageous for separating heat-sensitive compounds, it can also be employed for various other separation processes depending on the specific requirements of the application.
3: Are there any safety considerations when operating short path molecular distillation wiped film evaporators?
Safety is crucial when working with any distillation equipment. Proper protective equipment, such as gloves and safety glasses, should be worn, and adequate ventilation systems must be in place to ensure the safety of the operators.
4: How does short path molecular distillation improve separation efficiency?
Short path molecular distillation minimizes the distance the vaporized material has to travel, reducing pressure drop and improving separation efficiency. The short condenser design helps achieve higher purity and faster separation compared to traditional distillation techniques.
5: What are the primary maintenance requirements for short path molecular distillation wiped film evaporators?
Regular maintenance of short path molecular distillation wiped film evaporators includes cleaning the equipment, inspecting for leaks, and calibrating temperature and pressure gauges. Routine maintenance ensures optimal performance and extends the lifespan of the equipment.