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Method for extracting coix seed oil by supercritical CO2 extraction and rectification

A kind of Coix seed oil, supercritical technology, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat generation, etc., can solve the problem that the oleic acid value of Coix seed is not mentioned, and achieves improved purity, convenient operation, and avoidance of deterioration. Effect

Active Publication Date: 2013-06-19
JIANGSU JIANGDAYUAN ECOLOGICAL BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these methods are to solve the extraction rate of coix seed oil, and the control of the acid value of coix seed oil is not mentioned

Method used

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  • Method for extracting coix seed oil by supercritical CO2 extraction and rectification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 2.0 kg of coix seed that has been crushed to 40 mesh and put it into the extraction kettle 1, set the CO 2 Flow 200kg / h, open CO 2 pump 4, CO 2 gas from CO 2 Cylinder 1 passes through purifier 2, condenser 3, CO 2 Pump 4, preheater 5, will treat the CO 2 The gas is continuously passed into the extraction kettle 6 with coix seed, the temperature of the extraction kettle is set to 40°C, the pressure is 35MPa, and the extraction time is 3h; the CO containing coix seed oil is 2 The gas flows out from the top of the extraction kettle 6 and enters from the bottom of the rectification column 7; the temperature in the rectification column 7 is divided into four sections, respectively 35°C, 40°C, 45°C, and 50°C. The pressure inside is 13MPa, the coix seed oil is deacidified and filtered through the rectification column 7, and the coix seed oil contains CO 2 From the top of the rectification column 7, flow into the separation kettle I 8 and the separation kettle II 9, ...

Embodiment 2

[0024] Weigh 2.0 kg of coix seed that has been crushed to 60 mesh and put it into extraction kettle 1, set the temperature of extraction kettle 1 to 48°C, and the pressure to 35MPa; CO 2 The flow rate is 400kg / h; the extraction time is 3h. Coix seed oil dissolved in CO 2 After the temperature gradient from bottom to top is 37°C, 41°C, 45°C, 53°C, the whole column pressure is deacidified and filtered in the rectification column 7 in the range of 13MPa, and it flows into the separation tank I 8 from the top of the rectification column 7 and separates Kettle II 9, separation kettle I 8 temperature 50°C, pressure 10MPa; separation kettle II 9 temperature 33°C, pressure 5.2MPa; by reducing the pressure step by step and changing the temperature, coix seed oil can be separated from CO 2 precipitated and discharged from the bottom of the separation tank, CO 2 The gas is discharged from the top of the separation tank II 9 and returned to the system through the purifier 2 and condense...

Embodiment 3

[0027] Weigh 2.0 kg of coix seed that has been crushed to 60 mesh and put it into extraction kettle 1, set the temperature of extraction kettle 1 to 60°C, and the pressure to 40MPa; CO 2 The flow rate is 400kg / h; the extraction time is 3.5h. Coix seed oil dissolved in CO 2 After the temperature gradient from bottom to top is 36°C, 40°C, 47°C, 51°C, deacidification and filtration of the rectification column with the entire column pressure in the range of 12MPa, and flows into the separation tank I, 8 and separation tank II from the top of the rectification column 7 9. Separation kettle I 8 temperature 52°C, pressure 10MPa; Separation kettle II 9 temperature 32°C, pressure 5MPa; By reducing the pressure step by step and changing the temperature, coix seed oil can be separated from CO 2 precipitated and discharged from the bottom of the separation tank, CO 2 The gas is discharged from the top of the separation tank II 9 and returned to the system through the purifier 2 and con...

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Abstract

The invention discloses a method for extracting coix seed oil by supercritical CO2 extraction and rectification. In the method, the acid value of the coix seed oil is reduced by the processes of rectifying deacidification and two-stage deacidification; then colloidal lecithoid matters are obtained by eluting with a rectifying column; finally the coix seed oil is filtered; and thus, clear yellow coix seed oil is obtained. The extracted coix seed oil has a low acid value and is free of any entrainer, and the production method disclosed by the invention has high yield, is safe in production and operation and is an industrial high-grade coix seed oil extraction method with high practicability.

Description

technical field [0001] The invention relates to a method for extracting coix seed oil, in particular to using supercritical CO 2 The method for extracting coix seed oil with low acid value by combining extraction technology and rectification technology belongs to the technical field of coix seed deep processing. Background technique [0002] Coix seed is the dry and mature seed kernel of the Gramineae plant Coix. Coix seed contains many ingredients, including coix seed oil and coix seed ester, etc. Among them, coix seed oil is a mixture, mainly including protein, fat, vitamin, coix lactone, amino acid, etc., because coix seed oil contains a lot of Unsaturated fatty acids can significantly expand the pulmonary blood vessels, so it is clinically used in the treatment of cancer. However, the unsaturated fatty acid in coix seed oil is affected by factors such as environment, light, oxygen, moisture, and metal ions, and is easily oxidized to generate low-molecular fatty acids, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/04C11B1/10C11B3/00C11B3/12
Inventor 曹辉蒋云云郁树美
Owner JIANGSU JIANGDAYUAN ECOLOGICAL BIOLOGICAL TECH