A kind of supercritical extraction method of fruit and vegetable active substances

Abstract

The invention discloses a supercritical extraction method of active substances of fruits and vegetables, which belongs to the technical field of supercritical extraction. When the device needs to perform supercritical extraction of active substances of fruits and vegetables, an electric heater and a pressurizer are started to pressurize the extractor. Gentle pressure is applied, and the deformed airbag is deformed by the pressure, which causes the magnetic powders in the inner cavity that are originally in contact with each other to gradually separate, making the magnet block emit magnetism to the outside world, and causing multiple separation beads between the inner walls of the groove to be affected. Under the influence of the annular magnetic field, it keeps rotating in a circular motion, decomposes the fruits and vegetables placed inside it and falls into the screening hole for preliminary screening, because the particle size of the raw material is reduced, the contact area between the solid and the solvent is increased, and the extraction speed is increased. The screened raw material particles will not be too small or too fine, which prevents the sieve holes from being too small or too fine to block, thereby avoiding the blockage of the filter screen at the outlet of the extractor and improving work efficiency.

Description

technical field [0001] The invention relates to the technical field of supercritical extraction, in particular to a supercritical extraction method of fruit and vegetable active substances. Background technique [0002] Supercritical is a supercritical fluid, which is a state of matter that is neither gaseous nor liquid between gas and liquid. This substance can only exist when its temperature and pressure exceed the critical point. The density of supercritical fluid is relatively high. Large, similar to liquid, and its viscosity is closer to gas, so supercritical fluid is a very ideal extraction agent. [0003] At present, during the supercritical extraction of active substances of fruits and vegetables, since the fruits and vegetables may contain pesticides, it is necessary to extract the pesticides together. The contact area between the solid and the solvent is small, so that the extraction speed is weakened. At the same time, most of the existing technologies are usuall...

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Problems solved by technology

[0003] At present, during the supercritical extraction of active substances of fruits and vegetables, since the fruits and vegetables may contain pesticides, it is necessary to extract the pesticides together. The contact area between the solid and the solvent is small, so that the extraction speed is weakened. At the same time, most of the existing technologies are usually directly injected with CO 2 , while CO 2 If the flow rate is too large, it will cause CO in the extractor 2 As the flow rate increases, the CO 2 The residence time is shortened, and the contact time with the extract is reduced, which is not conducive to the improvement of the extraction rate. Also through this injection of CO 2 Pressurized situation, control CO 2 The flow rate may also cause the temperature and pressure in the extractor to not reach the required critical point, thereby reducing work efficiency

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