Method for extraction of unsaturated fatty acid from silkworm chrysalis

An unsaturated fatty acid, silkworm chrysalis technology, applied in the direction of fatty acid production, fatty acid preparation/refining, production of fat, etc., can solve problems such as difficulty in extracting oil and fat, low yield of silkworm chrysalis oil, large solvent demand, etc. Alcoholic fatty liver, high content, the effect of improving purity

Inactive Publication Date: 2018-09-04
ZHEJIANG ESIGMA BIOTECH CO LTD
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AI Technical Summary

Problems solved by technology

[0003] At present, the methods for extracting silkworm chrysalis oil mainly include solvent leaching and solvent pressing, but these methods have certain defects.
Silkworm chrysalis is a high-protein, high-fat material with low crude fiber content and relatively soft texture, so it is difficult to extract oil by solvent pressing, and the yield of silkworm chrysalis oil is also very low.
The solvent extraction method is not affected by the softness and hardness of the oil texture. After the oil is properly pretreated and a suitable solvent is selected, the oil can be extracted. However, the current solvent extraction method generally uses dichloromethane, acetone, etc. Larger single solvent extracts silkworm chrysalis oil, which not only pollutes greatly, but also has low yield, which is unfavorable for industrialized production; Crude oil), but the demand for solvent is large and the consumption time is long

Method used

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  • Method for extraction of unsaturated fatty acid from silkworm chrysalis

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Effect test

Embodiment 1

[0016] The method for extracting unsaturated fatty acid from silkworm chrysalis, the most preferred steps are:

[0017] 1) Hydraulic cold pressing: place silkworm chrysalis in a hydraulic oil pressing device, pressurize to 52kg / cm at room temperature 2 , maintaining pressure to discharge oil to obtain initial oil and oil residue;

[0018] 2) Spiral cold pressing: crush the oil residue, then place it in the screw oil pressing device, and squeeze to obtain the second cold pressing oil;

[0019] 3) Preparation of crude oil: combine the primary oil and the second cold-pressed oil, filter, then place the filtrate under vacuum conditions, fill with nitrogen and let stand for 6 days to obtain crude oil;

[0020] 4) Extraction of unsaturated fatty acids from crude oil: put the crude oil in supercritical CO 2 In the device, supercritical extraction is carried out, and the entrainer used is an ethanol solution containing 7% ethyl acetate and 0.01% ofloxacin, and the raffinate is colle...

Embodiment 2

[0022] The method for extracting unsaturated fatty acid from silkworm chrysalis, the specific steps are:

[0023] 1) Hydraulic cold pressing: place silkworm chrysalis in a hydraulic oil pressing device, pressurize to 40kg / cm at room temperature 2 , maintaining pressure to discharge oil to obtain initial oil and oil residue;

[0024] 2) Spiral cold pressing: crush the oil residue, then place it in the screw oil pressing device, and squeeze to obtain the second cold pressing oil;

[0025] 3) Preparation of crude oil: combine the primary oil and the second cold-pressed oil, filter, then place the filtrate under vacuum conditions, fill with nitrogen and let stand for 5 days to obtain crude oil;

[0026] 4) Extraction of unsaturated fatty acids from crude oil: put the crude oil in supercritical CO 2 In the device, supercritical extraction is carried out, and the entrainer used is an ethanol solution containing 5% ethyl acetate and 0.02% ofloxacin, and the raffinate is collected t...

Embodiment 3

[0028] The method for extracting unsaturated fatty acid from silkworm chrysalis, the specific steps are:

[0029] 1) Hydraulic cold pressing: place silkworm chrysalis in a hydraulic oil pressing device, pressurize to 60kg / cm at room temperature 2 , maintaining pressure to discharge oil to obtain initial oil and oil residue;

[0030] 2) Spiral cold pressing: crush the oil residue, then place it in the screw oil pressing device, and squeeze to obtain the second cold pressing oil;

[0031] 3) Preparation of crude oil: combine the primary oil and the second cold-pressed oil, filter, then place the filtrate under vacuum conditions, and let stand for 8 days with nitrogen to obtain the crude oil;

[0032] 4) Extraction of unsaturated fatty acids from crude oil: put the crude oil in supercritical CO 2 In the device, supercritical extraction is carried out, and the entrainer used is an ethanol solution containing 10% ethyl acetate and 0.01% ofloxacin, and the raffinate is collected t...

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Abstract

The invention discloses a method for extraction of unsaturated fatty acid from silkworm chrysalis. The method includes: firstly conducting hydraulic cold pressing, spiral cold pressing and nitrogen charging standing to obtain crude oil, then carrying out critical CO2 extraction to remove impurities from the crude oil, and extracting unsaturated fatty acid. The method has the beneficial effects that: the production process is simple, the automation degree is high, and high purity unsaturated fatty acid can be extracted from silkworm chrysalis quickly. The extracted unsaturated fatty acid has natural fragrance, no organic solvent residual and high content of alpha-linolenic acid, can effectively prevent and treat hyperlipidemia, promote liver cell regeneration, prevent and treat non-alcoholic fatty liver disease.

Description

technical field [0001] The invention relates to the field of extraction of unsaturated fatty acids, in particular to a method for extracting unsaturated fatty acids from silkworm chrysalis. Background technique [0002] In the "Dictionary of Traditional Chinese Medicine", it is recorded as follows: silkworm chrysalis oil can cure malnutrition fever, weight loss, and thirst in children; silkworm chrysalis oil is rich in various amino acids, trace elements and n-3 and n-6 ​​series polyunsaturated fatty acids, especially containing Polyunsaturated fatty acids necessary for the human body. At present, the development and research of silkworm chrysalis oil is more focused on reducing plasma and cholesterol, improving liver function, increasing the production of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the body, And it has the functions of adjusting blood lipid and anti-oxidation; at the same time, silkworm chrysalis contains a lot of amino acids, that is, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/02C11B1/06C11B3/00A61K35/64A61P1/16A61P3/06
CPCC11C1/02A61K35/63C11B1/06C11B3/001
Inventor 陈贵才王贤玉徐天华张小朋吴中华刘柳何奇雷程文虹胡荣海
Owner ZHEJIANG ESIGMA BIOTECH CO LTD
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