Rotavapor System
(1)1L/2L---Manual lifting with irony base/Manual lifting with SS base/Electric lifting
(2)3L/5L/10L/20L/30L/50L---Manual Lifting/Electric Lifting
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2. Customization:
(1)Design support
(2)Directly supply the Senior R&D organic intermediate, shorten your R&D time and cost
(3)Share the advanced purifying technology with you
(4)Supply the high quality chemicals and analysis reagent
(5)We want to assist you on Chemical Engineering (Auto CAD, Aspen plus etc.)
3. Assurance:
(1)CE and ISO certification Registered
(2)Trademark: ACHIEVE CHEM(since 2008)
(3)Replacement parts within 1-year for free
Description
Technical Parameters
Rotavapor system is a kind of laboratory equipment, which is mainly used for continuous distillation of volatile solvents under reduced pressure. It is mainly composed of a motor, a distillation bottle, a heating water bath pot, a condensing tube, a collecting bottle and the like.
The working principle of rotary evaporation system is based on steam distillation. Under negative pressure, when the solution is distilled by steam, the distillation flask rotates continuously. Its core component is a distillation flask, which is a pear-shaped or round-bottomed flask with a standard grinding mouth. It flows back to a snake-shaped condenser tube to connect with a vacuum pump through a certain height, and the other opening of the reflux condenser tube is connected with the round-bottomed flask with a grinding mouth to collect the evaporated organic solution. When the system is communicated with the atmosphere, the distillation flask and the liquid-receiving round bottom flask can be removed to transfer the solution. When the system is communicated with the vacuum pump, the system should be in a decompression state.
Product Introduction
The negative pressure principle is an important principle for accelerating evaporation in rotavapor system. Evaporation system is usually equipped with vacuum pump, which can realize the negative pressure control in the system, that is, reduce the pressure in the evaporation bottle to promote the evaporation of liquid.
The principle of negative pressure is based on the law of boiling point change in the process of material phase change. At standard atmospheric pressure, the boiling point of liquid is fixed, but at lower pressure, the boiling point of liquid will decrease with the decrease of pressure. For example, at higher altitudes, the boiling point of water will decrease because the atmospheric pressure there is lower.
In the rotovap system, by connecting the vacuum pump, the pressure in the evaporation bottle can be reduced to a certain extent, and the boiling point of the solvent can be reduced, thus promoting the evaporation of the solvent. In the negative pressure environment, the boiling point of the liquid mixture in the evaporation bottle decreases, and even at a relatively low temperature, the liquid can evaporate quickly. Therefore, the evaporation rate and evaporation efficiency can be adjusted by controlling the working flow of the vacuum pump.
Product Knowledge
Rotary evaporation systems usually use the following methods for feeding:
- Manual feeding: This is the simplest way to slowly pour the liquid or solution to be treated into the rotary evaporation bottle by hand. This method is suitable for small-scale experiments or situations where the feed rate needs to be accurately controlled. During manual feeding, attention should be paid to avoid spilling or dumping liquid too quickly to ensure safety and accuracy of operation.
- Automatic feeding: For large-scale or continuous feeding, the automatic feeding system can be used. Automatic feeding system usually includes a nozzle or conveying pipe, which conveys the liquid or solution to be treated from the external container to the rotary evaporation bottle by controlling the flow and speed of the liquid. The automatic feeding system can accurately control the feeding according to the set parameters and procedures, improve the production efficiency and reduce the intervention of operators.
- Syringe feeding: Sometimes, when a small amount of reagent or solution needs to be added, a syringe can be used for feeding. By injecting the reagent or solution into a specific position in the rotary evaporation bottle, accurate addition can be realized, and the feeding amount and rate can be controlled.
- Continuous feeding: In some applications, it may be necessary to feed continuously. Therefore, the liquid or solution can be stably transported to the rotary evaporation bottle through an external liquid storage tank or a solution supply system prepared in advance. This method is often used in industrial production processes that need to continuously treat a large amount of liquid.
The feeding process of rotavapor system using negative pressure principle is as follows:
Connect the rotary evaporation bottle with the feeding device to establish communication.
01
Start the vacuum pump to reduce the pressure in the rotary evaporation bottle to the required negative pressure range, generally 10-100 mbar.
02
Start feeding, and the liquid or solution to be added is conveyed to the rotary evaporation bottle through a pipeline or an automatic feeding device.
03
Due to the negative pressure principle, the liquid evaporates quickly in the rotary evaporation bottle. The added liquid or solution will quickly evaporate in the rotary evaporation bottle, producing a mixture of gas and solvent, which is pumped out by the vacuum pump, thus maintaining the negative pressure environment of the rotary evaporation bottle.
04
After feeding, the negative pressure condition can be maintained as required, evaporation separation can be carried out or the vacuum pump can be stopped, so that the rotary evaporation bottle can be restored to atmospheric pressure, which is convenient for subsequent operation.
05
The advantage of feeding by negative pressure principle is that the added liquid or solution can be evaporated quickly, which avoids the time of waiting for evaporation in the traditional feeding method and improves the production efficiency. In addition, using the negative pressure principle can also reduce heating time and energy consumption, and improve the energy utilization efficiency of the equipment.
Applications
The rotary evaporation system can recover salts from seawater, mainly through the following steps:
Pretreatment:
First, seawater needs to be pretreated to remove impurities such as large particles, organic matter and algae. This step is usually achieved by filtration or sedimentation.
01
Heating:
Then, put the pretreated seawater into the heating part of the rotary evaporator for heating. This process is usually carried out using steam or other heat sources.
02
Rotary evaporation:
In the heating section, seawater is heated and rotated to form a film. As the rotation progresses, water molecules gradually evaporate from the seawater, while salt remains at the bottom.
03
Condensation:
The evaporated water molecules are condensed by a condenser to form pure water.
04
Collection:
Finally, the water formed by condensation is collected, which is the salt recovered from seawater.
05
The description of the use of this system to recover salt from seawater is very insightful, but it is necessary to clarify a few points for the sake of accuracy. Here is a revised version that contains these clarifications:
The potential benefits of utilizing a rotavapor system, or a similar evaporation technology adapted for large-scale applications, in the context of salt recovery from seawater are primarily evident in the following aspects:
Addressing Water Scarcity:
With freshwater resources becoming increasingly scarce globally, seawater desalination offers a crucial solution. However, it's worth noting that traditional desalination processes primarily focus on producing freshwater by removing salts and other impurities. A system designed specifically for salt recovery, while potentially utilizing evaporation principles, would target the valuable salts themselves, often as a byproduct or co-product of the desalination process. The purified water obtained can then be used to meet the demands of daily life and industrial production.
Chemical Raw Materials:
The salts recovered from seawater, such as sodium chloride (common salt), potassium chloride, and magnesium salts, are invaluable chemical raw materials. They are widely used in the chemical industry for the production of chlorine, sodium compounds, potassium compounds, and various other chemicals. Additionally, these salts find applications in medicine, agriculture, and numerous other sectors, contributing to the economic growth and sustainability of various industries.
Environmental Benefits:
Compared to some traditional desalination methods, which can be energy-intensive and potentially generate waste streams, a well-designed salt recovery system, incorporating evaporation principles efficiently, could offer advantages in terms of reduced energy consumption, increased efficiency, and minimized environmental impact. It's important to note that the specific environmental benefits will depend on the overall system design and the methods used for salt recovery and wastewater management.
Versatility and Wide Application Prospects:
While not typically associated with rotavapors used in laboratory settings, large-scale evaporation systems can indeed be multifunctional. They can be adapted for seawater desalination and salt recovery, as well as for liquid concentration, separation, and purification in various industries, including food processing and pharmaceutical manufacturing. The potential for such systems to serve multiple purposes underscores their wide application prospects and potential contributions to industrial sustainability.
It's important to emphasize that the direct use of a traditional rotavapor system, as commonly encountered in laboratories, for large-scale seawater desalination and salt recovery would be impractical due to its size, capacity, and operational constraints. However, the principles of evaporation and concentration, as exemplified by rotavapor technology, can inform the design and optimization of larger-scale systems tailored for industrial applications.
Safety and maintenance precautions
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Safety precautions
Before using the rotary evaporator, it is necessary to be familiar with its operating procedures and operate in strict accordance with the instructions.
Wear appropriate protective equipment, such as lab coats, gloves, and goggles, to prevent chemicals from splashing on the skin or eyes.
Ensure that the electrical part of the rotary evaporator is dry, and water or moisture is strictly prohibited to prevent electric shock accidents.
Before use, check whether the power cable is in good condition and avoid using damaged power cables.
Before starting the vacuum system, ensure that the joints, interfaces and sealing rings are air-tight to prevent insufficient vacuum or leakage.
When stopping the distillation, the rotation function should be turned off first, and the vacuum pump should be closed after the vacuum degree is reduced to a certain extent to prevent suction and instrument damage.
Water must be added before the heating tank is energized, and dry burning without water is strictly prohibited to prevent damage to heating elements and fire accidents.
The cooling system should be kept in good working condition to ensure that the cooling medium temperature in the condenser is moderate to achieve the best condensation effect.
When handling toxic, harmful or flammable and explosive samples, special care should be taken to ensure that the laboratory is well ventilated and necessary protective measures are taken.
Avoid overloading the sample to prevent blowout or damage to the steam duct.
Maintenance precautions
Regular cleaning:
After use, the various components of the rotary evaporator should be cleaned in time, especially the evaporation bottle, condenser and collection bottle, etc., to prevent the residue from causing corrosion or blockage of the instrument.
Regularly clean and maintain the sealing ring, check whether there is dirt on the shaft, and wipe it with a soft cloth and apply a little vacuum grease to maintain its good sealing performance.
Check and replace parts:
Regularly check whether the various parts of the rotary evaporator are in good condition, and replace them in time if damaged.
For wearing parts, such as sealing rings, vacuum tubes, etc., should be replaced regularly to ensure the air tightness and stability of the instrument.
Lubrication and maintenance:
During use, the moving parts should be lubricated regularly to reduce wear and extend service life.
After shutdown, the PTFE switch should be loosened to prevent long-term static in the working state leading to the deformation of the PTFE piston.
Records and documents:
Establish the use and maintenance records of the rotary evaporator, and record in detail the time of each use, sample type, operation process and maintenance.
Keep the instructions and operation manual of the instrument for reference when needed.
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