Introduction to the characteristics of supercritical extraction equipment, come and collect it!
A supercritical fluid is a supercritical fluid, a state between a gas and a liquid, neither a gas nor a liquid. This substance can only be present when the temperature and pressure exceed the critical point. Supercritical fluids have a higher density, similar to liquids, and viscosity closer to gases. Therefore, supercritical fluids are an ideal extractant.
The principle of the technical separation and development process of supercritical extraction device is to use supercritical carbon dioxide to have a special dissolving effect on the research of special natural products in some countries, and the use of supercritical carbon dioxide dissolution problem ability can be related to its different density, that is, the influence of working pressure and temperature on the dissolution behavior of supercritical carbon dioxide. What are the characteristics of supercritical extraction units? Let's take a brief look at it together.
1. It can be extracted at close to room temperature (35-40 °C) and CO2 gas shrouded, effectively preventing the oxidation and escape of heat-sensitive substances, therefore, the extract retains the active ingredients of medicinal plants, and substances with high boiling point, low volatility and easy pyrolysis can be extracted at temperatures far below the boiling point.
2. The use of SFE is a cleaner extraction method, because the whole process does not use organic solvents, so the extract has no residual solvent substances, thereby preventing the existence of harmful substances to the human body and environmental pollution during the extraction process.
3. Extraction and separation are combined into one, when the saturated dissolved CO2 fluid enters the separator, due to the drop in pressure or temperature change, the CO2 and the extract quickly become two phases (gas-liquid separation) and immediately separate, not only the extraction efficiency is high and the energy consumption is less, the production efficiency is improved and the cost is reduced.
4. CO2 is an inactive gas, no chemical reaction occurs during the extraction process, and it is a non-combustible gas, tasteless, odorless, and very safe.
5. CO2 gas is cheap, high purity, easy to prepare, can be reused in production, effectively reducing the cost.
6, supercritical extraction pressure and temperature can become the parameters to adjust the extraction process, supercritical extraction by changing the temperature and pressure to achieve the purpose of extraction, supercritical extraction pressure fixed by changing the temperature can also separate the substance, by reducing the pressure to separate the extract, so the process is simple and easy to master, and the speed of extraction is fast.
What is the technical principle of the supercritical extraction device? Let's take a brief look at it together.
In the supercritical state, the supercritical carbon dioxide is contacted with the substance to be separated in the uranium ore, so that the components of polarity, boiling point and molecular weight in the uranium ore are selectively extracted in turn. Of course, it is impossible to get an extract in every pressure range, but you can control the conditions to get the right mixture ratio, and then lower the pressure and raise the temperature to make the supercritical fluid into an ordinary gas, and the extraction process of carbon dioxide is a combination of extraction and separation of supercritical fluid.
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