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Method for extracting oil and protein in silybum marianum kernels by subcritical fluid

A technology of subcritical fluid and milk thistle, which is applied in the extraction and separation of vegetable oil and protein, and the field of subcritical fluid extraction of oil and protein in milk thistle kernels, to achieve the improvement of extraction yield, product quality and equipment manufacturing cost low effect

Inactive Publication Date: 2015-05-27
吴长军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the research of the applicant: the current subcritical fluid extraction technology is suitable for large-scale industrial production, especially the simultaneous extraction and separation of two products of oil and protein in milk thistle seeds in one process is still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: make extraction solvent with butane.

[0022] (1) Mechanically peel the silymarin seeds that have been screened and dried without impurities. Obtain milk thistle seed kernels.

[0023] (2) Grind (squeeze) the milk thistle seeds and break them.

[0024] (3) Put the crushed milk thistle seed kernel and the extraction solvent butane into the subcritical fluid extraction kettle at a ratio of 1:20, the extraction temperature is 5°C, the extraction pressure is 0.8mpa, and the extraction solvent flow rate is 80L / Under the condition of h, the countercurrent gradient extraction was carried out continuously for 10 times, and the extract was obtained for 75 min each time. The extraction process was supplemented by ultrasonic waves and stirring.

[0025] (4) Transfer the extract to the evaporation system, and use the method of decompression and heating to vaporize and separate the butane in the extract. The separation pressure is 0.4mpa, and the separation temperat...

Embodiment 2

[0027] Embodiment 2: make extraction solvent with dimethyl ether.

[0028] (1) The pretreatment of the extract - milk thistle seed kernel is as in Example 1.

[0029] (2) Put the pretreated milk thistle kernels and the extraction solvent dimethyl ether into the subcritical fluid extraction kettle at a ratio of 1:5. Under the condition of 40L / h, countercurrent gradient extraction was carried out continuously 15 times, 30min each time. To obtain an extract, the extraction process is supplemented by ultrasonic waves and stirring.

[0030] (3) Transfer the obtained extract to the evaporation system, and use the method of decompression and heating to vaporize and separate the dimethyl ether in the extract. The separation pressure is 0.1mpa, the separation temperature is 30°C, and the dimethyl ether is separated from the extract. , namely milk thistle seed oil.

[0031] (4) Reduce the pressure in the extraction kettle to 0.1mpa and raise the temperature to 30°C to collect the vap...

Embodiment 3

[0032] Embodiment 3: make extraction solvent with isobutane.

[0033] (1) The pretreatment of the extract - milk thistle seed kernel is as in Example 1.

[0034] (2) Put the pretreated milk thistle kernels and the extraction solvent isobutane into the subcritical fluid extraction kettle at a ratio of 1:1, the extraction temperature is 35°C, the extraction pressure is 2.3mpa, and the extraction solvent flow rate is Under the condition of 120L / h, countercurrent gradient extraction was performed continuously for 5 times, 120min each time. To obtain an extract, the extraction process is supplemented by ultrasonic waves and stirring.

[0035] (3) Transfer the obtained extract to the evaporation system, and use the method of decompression and heating to vaporize and separate the isobutane in the extract. The separation pressure is 1.0mpa, the separation temperature is 45°C, and the isobutane is separated from the extract. , vested milk thistle seed oil.

[0036] (4) Reduce the pr...

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Abstract

The invention relates to a method for extracting oil and protein in silybum marianum kernels by subcritical fluid. The method is characterized by comprising the following steps: (1) screening dried silybum marianum kernels, removing impurities, and peeling hulls by virtue of a peeling machine to obtain silybum marianum kernels; (2) rolling or extruding and grinding the silybum marianum kernels; (3) putting the ground silybum marianum kernels and an extraction solvent into a subcritical fluid extraction kettle for continuous extraction to obtain extracting liquid; (4) gasifying the extracting solvent by means of pressure reduction and temperature increase in an evaporation system to separate the extracting solvent from the extracting liquid so as to obtain silybum marianum kernel oil; (5) keeping the solid in the extraction kettle as the silybum marianum protein. Compared with supercritical extraction, the method has the advantages of low equipment investment and low production state stress, and is suitable for industrial large-scale production. Compared with a traditional process for preparing oil and protein, the method has the advantages of simple process flow, high yield, good quality of oil and protein, environmental friendliness and no pollution.

Description

technical field [0001] The invention relates to a treatment method of milk thistle, in particular to a method for extracting oil and protein in milk thistle seed kernels with a subcritical fluid, which belongs to the extraction and separation technology of vegetable oil and protein. Background technique [0002] Milk thistle, also known as pheasant and milk thistle, is a plant of the genus Milk thistle in the family Asteraceae. Its scientific name is Herba Silybi in English and Silyum marianum in Latin. Native to the Mediterranean coast, it is also distributed wildly on the western grasslands of Asia. It is a biennial or annual herbaceous plant. It is now cultivated in Europe, Asia, Africa, and North and South America. [0003] Milk thistle is an excellent economic crop and oil plant, and its fruit or seeds have good nutritional and health effects. In the late 1960s, scientists represented by H Wanger from West Germany discovered and confirmed that the extract of milk thist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/04C11B1/00C07K1/14
CPCC07K1/14C11B1/04C11B1/104C11B1/108C11B3/12Y02P20/54
Inventor 吴长军
Owner 吴长军
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