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Novel supercritical carbon dioxide extraction technology for continuously carrying out fine extraction on liquid raw materials

A carbon dioxide and liquid raw material technology, applied in liquid solution solvent extraction, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve the constraints on the development of supercritical extraction technology, low space-time yield of the device, difficulty in obtaining high purity and high added value Products and other issues, to achieve the effect of shortening the production cycle, reducing production costs, selective acquisition or removal

Inactive Publication Date: 2012-07-11
BIO SCENT INNOVATION XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] It can be seen that in this supercritical carbon dioxide extraction process, there is an extraction kettle that cannot be continuously operated, resulting in a low space-time yield of the device, and there is no good solution at present; at the same time, the fractions extracted by traditional supercritical extraction equipment are mostly mixtures. It is difficult to obtain high value-added products with high purity, which seriously restricts the development of supercritical extraction technology

Method used

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  • Novel supercritical carbon dioxide extraction technology for continuously carrying out fine extraction on liquid raw materials
  • Novel supercritical carbon dioxide extraction technology for continuously carrying out fine extraction on liquid raw materials

Examples

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Effect test

example 1

[0025] The free fatty acid and wax in rice bran oil seriously affect the quality of rice bran oil, so dewaxing and free fatty acid treatment are required for rice bran oil. Put the crudely squeezed rice bran oil into a container connected to the extraction kettle, fill the extraction kettle with zeolite and compact it. The supercritical fluid is carbon dioxide, the extraction pressure is set at 50MPa, the extraction temperature is 70°C, the pressure of the separation tank is 4.5~7MPa, the temperature of the separation tank is 75°C, and continuous extraction is performed to obtain dewaxed and low-free fatty acid rice bran oil , Improve the application value of rice bran oil.

[0026] About the rice bran oil utilization technique of the present invention and the extraction comparison of normal hexane method technique.

[0027] Crude rice bran oil contains 2-4% waxes, 1-2% phospholipids and 5-25% free fatty acids, pigments, etc., which makes crude rice bran oil difficult to puri...

example 2

[0030] Crude lemon essential oil contains a large amount of terpenes, which are easily oxidized and affect the stability of lemon essential oil as a food additive. Therefore, deterpened lemon essential oil has better stability and market value. Put the crudely squeezed lemon essential oil into a container that can lead to the extraction kettle, fill the 2L extraction kettle with 40-60 mesh microsphere silica gel and compact it. The supercritical fluid is carbon dioxide, the extraction pressure is set at 9MPa, the extraction temperature is 40°C, the temperature of the separation tank is 45°C, and the pressure is 4.5MPa. Control the flow of the essential oil raw material pumped into the extraction kettle from the container leading to the extraction kettle, and adjust the flow rate of the liquid carbon dioxide pumped into the extraction kettle so that the flow rate ratio of the two is 4:1. This moment, what collected in the separation kettle was mainly the terpene components in t...

example 3

[0034] Bergamot essential oil contains furanocoumarins, which can cause skin allergies and even cancer, so the furanocoumarins should be removed. The furanocoumarin content is that the thick bergamot essential oil of 4541ppm is packed in the container leading to extraction kettle, and 60~80 order diatomites are loaded into 2L extraction kettle. The supercritical fluid is carbon dioxide. Set the extraction pressure to 20MPa, the extraction temperature to 40°C, the temperature of the separation tank to 45°C, and the pressure to 4.5MPa. Control the flow of essential oil raw materials pumped into the extraction tank from the container leading to the extraction tank to adjust the liquid state. The flow rate of the carbon dioxide pumped into the extraction tank is such that the flow rate ratio of the two is 6:1. Under this process, defuranocoumarin bergamot essential oil can be obtained.

[0035] The extraction comparison of defuranocoumarin using technique of the present invention...

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Abstract

The invention relates to a novel supercritical carbon dioxide extraction technology for continuously carrying out fine extraction on liquid raw materials. The liquid raw materials are filtered, have slag removed, and then are added into a container communicated to an extraction kettle; a random pressure and a random temperature are set in the range that the extraction pressure is higher than or equal to 7.3 MPa and the extraction temperature is higher than or equal to 3.2 DEG C; the flow of the liquid raw materials pumped into the extraction kettle from the container communicated to the extraction kettle is controlled and the flow rate of supercritical carbon dioxide pumped into the extraction kettle is regulated so as to change the ratio of supercritical liquid to a liquid sample to reach the optimal separation efficiency of different liquid samples and implement the continuous dynamic extraction; and fraction in a separation kettle is collected at regular time or continuously, so that corresponding extraction phases can be obtained; the extraction phases are absorbed by column chromatography fillers; and the extraction phases can be extracted by methods of changing the extraction pressure and the extraction temperature or changing the flow rate of the supercritical liquid or pumping a cosolvent and the like. According to the invention, the continuous supercritical carbon dioxide extraction of the liquid raw materials is implemented; the novel supercritical carbon dioxide extraction technology has the advantages of simple process flow, high repeatability, short process flow and wide application range, is convenient to operate, is green and has no pollution.

Description

technical field [0001] The invention relates to a supercritical carbon dioxide extraction technology, in particular to a novel supercritical carbon dioxide extraction technology for continuously refining liquid raw materials. Background technique [0002] Supercritical fluid extraction technology is a new type of extraction and separation technology that emerged in the 1960s. Supercritical Fluid Extraction (SFE) generally uses carbon dioxide as the extraction agent. It has the advantages of simple process, no organic solvent residue, mild operating conditions, It is not easy to destroy the active ingredients and other advantages. The principle is to use the unique dissolving ability of supercritical fluid and the characteristics that the solubility of substances in supercritical fluid is very sensitive to changes in pressure and temperature, and dissolve the dissolved substances in supercritical fluid by means of temperature rise and pressure reduction (or both). The substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04B01D15/10
Inventor 刘祝君曾骥孟陈康刘节喜朱洪珍郑声煊谢加凤伍宏李煌基
Owner BIO SCENT INNOVATION XIAMEN
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