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According to the principle of similar dissolution of organic matter, the subcritical extraction equipment transfers the fat soluble components in solid materials to the liquid extractant through the molecular diffusion process of extraction material and extractant in the soaking process. Then the extraction agent is separated from the target product by the process of vacuum evaporation, and the target product is finally obtained.
| No. | Equipment | Models and Key Parameter | Quantity | Notes |
|---|---|---|---|---|
| 1 | Volume of Extraction Pot | 5L/ 20L/ 50L/ 100L/ 150L/ 200L | 1 | With Heating Jacket |
| 2 | Separation Tank | 5L/ 20L/ 50L/ 100L/ 150L/ 200L | 1 | With Heating Jacket |
| 3 | Buffer Tank | 5L/ 20L/ 50L/ 100L/ 150L/ 200L | 1 | With Heating Jacket |
| 4 | Condenser | 1m²/ 2m²/ 5m²/ 8m²/ 10m² | 1 | Cool Water |
| 5 | Solvent Pot | 19L/ 29L/ 59L/ 119L/ 159L | 1 | With Solvent Exchange Unit |
| 6 | Gauge Tank | 1L/ 15L/ 45L/ 95L/ 145L | 1 | With Measurement Scale |
| 7 | Heater | 6kw | 1 | Electrical Heating |
| 8 | Hot Water Tank | Size:300*500*500 | 1 | Explosion-proof heater: 5KW |
| 9 | Hot Water Pump | 1 | Explosion-Proof Motor:0.75KW | |
| 10 | Diaphragm compressor | 1 | Explosion-Proof Motor:5.5KW | |
| 11 | Distribution Box | 400*600 | 1 | |
| 12 | Switch Cabinet | 400*500 | 1 |
Principle and advantages of sub-critical low temperature extraction technology:
The subcritical fluid is mainly liquefied butane. The boiling point of the components in the solvent is below 0 ° C, and the boiling point of butane is -0.5 ° C, which is a gas at normal temperature and pressure and is liquid after pressure.
The basic principle of the process is to extract oil with subcritical fluid countercurrent at room temperature and certain pressure. Then the solvent in the feed liquid is vaporized under pressure. The solvent gas after gasification is compressed and condensed by the compressor and then recycled.
A. The method of normal temperature extraction and low temperature dissolution does not destroy the heat sensitive substances in tea seed oil and protein. The content of active substance in the extracted oil was higher than that of solvent No. 6. (The No. 6 solvent has a boiling point of 60-90°, so the separation of solvent and oil requires a high temperature of more than 100°, which is very destructive to biological activity). Both the active substance in the oil and the active substance in the meal are guaranteed. Tea saponin, protein and polysaccharide can be extracted from the residue.
B. The active substance in the material remains intact after sub-critical low temperature extraction, achieving the same effect as supercritical extraction. However, subcritical low-temperature extraction equipment investment and operating costs are much lower than supercritical extraction, less than 30% of supercritical extraction.
C. The equipment is a universal device, which can process a variety of materials: such as microalgae oil, almond oil, tea seed oil, safflower seed oil, grape seed oil, Chinese herbal medicine, sea buckthorn seed, pigment, etc.
At present, the demonstration plant with 70 tons of materials per day has been running stably for 18 years.
Subcritical extraction process of tea seed oil:
Preprocessing:
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