Supercritical CO2 Fluid Extraction Device

DESCRIPTION

The principle of the supercritical CO2 fluid extraction (SFE) separation process is based on the relationship between the solubility of supercritical fluid and its density, that is, the influence of pressure and temperature on the solubility of supercritical fluid. In the supercritical state, the supercritical fluid is brought into contact with the substance to be separated, so that the components with polarity, boiling point and molecular weight can be selectively extracted in sequence. Of course, the extract obtained corresponding to each pressure range cannot be single, but the conditions can be controlled to obtain the ideal proportion of mixed components, and then the supercritical fluid can be turned into an ordinary gas by reducing pressure and raising temperature, and the extracted substances can be completely Or basically precipitate, so as to achieve the purpose of separation and purification, so the supercritical CO2 fluid extraction process is a combination of extraction and separation processes.

The supercritical CO2 device mainly consists of an extraction kettle, a separation kettle, a CO2 high-pressure pump, an entrainer pump, a refrigeration system, a CO2 storage tank, a heat exchange system, a purification system, a flow meter, a temperature control system, a pressure control measurement system, and a touch screen PLC. It is composed of control acquisition system, safety protection device, etc.

The characteristics of supercritical CO2 extraction determine that its application range is very broad. For example, in the pharmaceutical industry, it can be used for the extraction of active ingredients of Chinese herbal medicine, the refining of heat-sensitive biological drugs, and the separation of lipid mixtures; in the food industry, the extraction of hops, the extraction of pigments, etc.; in the spice industry, natural and Refining of synthetic fragrances; separation of mixtures in the chemical industry, etc. Specific applications can be divided into the following aspects:

1. Extraction of bioactive molecules from medicinal plants, extraction and separation of alkaloids;

2. Lipid lipids from different microorganisms, or used for lipid lipid recovery, or to remove lipid lipids from glycosides and proteins;

3. Extract anti-cancer substances from a variety of plants, especially paclitaxel from the bark, branches and leaves of yew trees to prevent and treat cancer;

4. Vitamins, mainly the extraction of vitamin E;

5. Purify various active substances (natural or synthetic) to remove unnecessary molecules (such as removing pesticides from vegetable extracts) or "dregs" to obtain purified products;

6. Processing of various natural antibacterial or antioxidant extracts, such as basil, basil, thyme, garlic, onion, chamomile, paprika, licorice and fennel seeds, etc.

FEATURES

1. Supercritical extraction can be performed near room temperature (35-40°C) and under a CO2 gas envelope, effectively preventing the oxidation and escape of heat-sensitive substances. Therefore, the active ingredients of medicinal plants are maintained in the extract, and substances with high boiling points, low volatility, and easy pyrolysis can be extracted at temperatures far below their boiling points;

2. The use of supercritical extraction is a clean extraction method. Since the whole process does not use organic solvents, there is no residual solvent substance in the extract, thus preventing the presence of harmful substances to the human body and pollution to the environment 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 the change in temperature, the CO2 and the extract quickly become two phases (gas-liquid separation) and are immediately separated. Not only is the extraction efficiency high, but it also consumes less energy, which improves production efficiency and reduces costs;

4. CO2 is an inactive gas. No chemical reaction occurs during the extraction process, and it is a non-flammable gas. It is tasteless, odorless, non-toxic and safe;

5. CO2 gas is cheap, has high purity, is easy to prepare, and can be recycled repeatedly in production, thus effectively reducing costs;

6. Pressure and temperature can both become parameters for regulating the extraction process. The purpose of extraction is achieved by changing the temperature and pressure. Substances can also be separated by fixing the pressure and changing the temperature; conversely, by fixing the temperature, the extract can be extracted by lowering the pressure. separation, so the process is simple and easy to master, and the extraction speed is fast.

SPECIFICATIONS