Supercritical extraction method of fruit and vegetable active substances

Abstract

The invention discloses a supercritical extraction method of fruit and vegetable active substances, and belongs to the technical field of supercritical extraction. When the device needs to perform supercritical extraction of fruit and vegetable active substances, an electric heater and a pressurizer are started to heat and apply pressure to an extractor, a deformation air bag deforms due to pressure, magnetic insulation powder originally making contact with one another in an inner cavity is gradually separated, a magnet block emits magnetism to the outside, a plurality of separating rotating beads between the inner walls of a groove are affected by an annular magnetic field to do circular motion and rotate all the time, fruits and vegetables placed inside are decomposed and fall into screening holes, and preliminary screening is conducted. Due to the fact that the granularity of raw materials is reduced, the contact area of solids and a solvent is increased, the extraction speed is increased, the screened raw material particles cannot be too small or too fine, the situation that too small or too fine particles block sieve holes is avoided, and therefore, blockage of a filter screen at an outlet of the extractor is avoided, and working efficiency is improved.

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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