CN105038971A - Linseed oil supercritical fluid extraction technology - Google Patents

Abstract

The invention provides a linseed oil supercritical fluid extraction technology. Linseed oil is obtained through the CO2 supercritical fluid extraction step and the hyperfiltration step. In the production technology, especially in the refining process of linseed oil, no chemical reagent is added, a pure physical method is adopted for refining, and the obtained linseed oil reserves the specific flavonoid substances, linolenic acid, Vitamin E and other active materials of linseeds, and is free of residual solvent and pollution, good in safety and high in quality. Due to the fact that no chemical reagent is added in the extraction process and no chemical residual reagent exists, the linseed oil can serve as excellent high-end edible oil and cosmetic or a pharmacy additive. The linseed oil is heavy in fragrance and unique in flavor, can be widely applied to cooking various food and dishes and has high nutritive value and healthcare and maintaining effects, the high anti-oxidative active ingredients are ensured, and the linseed oil supercritical fluid extraction technology is especially suitable for being popularized in the technical field of small-batch special oil production.

Description

Linseed oil supercritical fluid extraction technique

Technical field

The present invention relates to a kind of method of linseed oil supercritical extraction, art: biological and new medical technology, modern agricultural technology, agricultural-food intensive processing and modern accumulating: agriculture and forestry product and extraordinary enhance productivity are processed.

Background technology

linseed oil (LinumustitatissimumL), also known as flax, belongs to flax family (Linaceae), linum, is one of large oil crops in the world ten, mainly for countries such as Canada, Argentina, India, the U.S., China.Main containing functional ingredient such as fat, albumen, carbohydrates in linseed oil, what is more important linseed oil is rich in the linseed oil of alpha-linolenic acid content, and linseed oil is one of known plants grease that current n-3 fatty acid content is the highest.Be rich in multiple unsaturated fatty acids in linseed oil, wherein the content of alpha-linolenic acid can reach 40% ~ 60%.Alpha-linolenic acid belongs to essential fatty acid, and be otherwise known as vitamin F, can not only synthesize other two kinds of unsaturated fatty acidss EPA, DHA, is the core substance participating in phosphatide synthesis, metabolism, conversion simultaneously.Nowadays in developed countries such as America and Europes, oleum lini uses as nutritional additive or functional food ingredients.Recent study finds, linseed oil has preventing hyperlipidemia, atherosclerosis, reduce blood pressure, strengthen Regular Insulin falls hypoglycemic effect.

the traditional hot moulding of China squeezes after oil crop seeds by using is fried roasting, smell special fragrant, color is comparatively dark, output higher but

can nutrition be destroyed, be of low nutritive value.

and current cold pressing process, more or less all can use chemical additive in process of production, thus at final product

chemical residue is had in product.Be badly in need of a kind of linseed oil production and processing method.

Summary of the invention

The object of the present invention is to provide the linseed oil production method of a kind of easy, nutritive value and health care, rational technology.

Technical scheme of the present invention is achieved in that and comprises the steps:

A, airing is carried out to linseed oil, control water ratio 3%-5%;

B, the linseed kernel dried put into freezing 3 ~ 9 hours of the refrigerated tank of-25 DEG C, to be placed in the vacuum environment of-10 DEG C 3 ~ 8 hours, be finally placed in 40 ~ 60 DEG C of vacuum environment drying treatment 2 ~ 7 hours;

C, the linseed kernel pulverizing will obtained after B, process, sieve by 20 ~ 40 mesh sieve;

D, CO ₂supercritical extraction, fluid extraction pressure is 35 ~ 45MPa, extraction temperature 35 ~ 45 DEG C, CO ₂fluid flow rate is 800 ~ 1100L/h, and extraction time is 40 ~ 100 minutes, obtains linseed kernel slightly oily;

E, hyperfiltration remove lipoxygenase, select the hyperfiltration film of molecular weight cut-off 80-120kD, carry out hyperfiltration process to the linseed oil after filtering;

F, uv irradiating, the linseed oil after filtration flows through the irradiating unit that ultraviolet lamp is settled in top, and irradiation dose is 300-400J/m2, and irradiation time is 10-20 second.

Compared with prior art the inventive method tool has the following advantages: (1) the invention provides a kind of linseed oil production technique, particularly in the refining process of linseed oil, do not add chemical reagent, pure physical method is adopted to carry out refining, the linseed oil obtained remains the distinctive Flavonoid substances of linseed oil and vitamin-E isoreactivity material, and no solvent residue, pollution-free, security good, oil quality is high.Owing to not adding any chemical reagent in extractive process, without chemical residual reagent, can be used as fabulous high-end edible oil and makeup or pharmacy additive.Edible and in medicine can kidney tonifying benefit lung, helping inspiration to relieve asthma, relax bowel; (2) the present invention utilizes Lyophilisation technique for making, is convenient to by walnut kernel pulverize; (3) the present invention utilizes CO ₂supercritical extraction technique, make do not have organic solvent residual in product, the crude oil color and luster that simultaneously extracts is more shallow than squeezing linseed oil, do not need through coming unstuck, alkali refining, decolouring, deodorization process, thus the loss such as natural nutrition VE is few, and also not producing the objectionable impuritiess such as trans fatty acid provides; (4) the present invention utilizes ultra micro membrane filtration technique, eliminates in linseed oil storage process and causes rotten biotic factor; Oxygenase in linseed oil, in storage process, the double bond fracture in the unsaturated fatty acids in catalyzed oxidation linseed oil, produces the smell substances such as aldehyde ketone and produces, and linseed oil is gone bad; Tradition hot moulding utilizes high temperature to make oxygenase deactivation; Solvent extraction method is in refining process, make oxygenase inactivation; Technique of the present invention is without heat denatured process, also do not carry out refining, and adopt ultra micro membrane filtration technique, the lipoxygenase in ultrafiltration removing linseed oil, eliminate in linseed oil storage process and cause rotten biotic factor, and the clarity simultaneously added; (5) the present invention utilizes uv irradiating technology, kills the activity of fatty oxygenase do not removed completely in hyperfiltration process, and destroys the structure of remaining aflatoxin further, reaches the object eliminated further.In order to ensure the circulation of ultrafiltration, the ultra-filtration membrane of the 80-120KD selected in technique, can remove most lipoxygenase, but can not remove completely.Remaining lipoxygenase, utilizes the uv irradiating process of low dosage, both can ensure that the quality of oil is not suffered a loss, can reduce again residual fat oxygenase further active, ensure the storage of oil.Meanwhile, utilize the wavelength of UV-light short, energy is large, when being irradiated to body surface, is easily subsequently absorbed in the material, becomes the interior energy of material, destroys the characteristic of the chemical bond of material molecule, reduces the aflatoxin content in linseed oil further; The aldehyde material letones of rapid removal wherein in peculiar smell, and produce the free fatty acids of peculiar smell, and ensure that nutritive substance loss is wherein little; (6) in the high-quality grease that the present invention produces, because be rich in the natural antioxidantss such as natural VE, do not need in grease storage process additionally to add oxidation inhibitor.

The invention provides the linseed oil production method of a kind of easy, nutritive value and health care, rational technology, can produce for short run special oil and technical support is provided, be suitable for promoting in edible fat production technical field.

Embodiment

A kind of linseed oil production technique:

A, airing is carried out to linseed kernel, control water ratio 4%;

B, the linseed kernel dried put into freezing 6 hours of the refrigerated tank of-25 DEG C, to be placed in the vacuum environment of-10 DEG C 7 hours, be finally placed in 45 DEG C of vacuum environment drying treatment 3 hours;

C, the linseed kernel pulverizing will obtained after B, process, sieve by 20 mesh sieve;

D, CO ₂supercritical extraction, fluid extraction pressure is 40MPa, extraction temperature 40 DEG C, CO ₂fluid flow rate is

1000L/h, extraction time is 70 minutes, obtains linseed kernel slightly oily;

E, hyperfiltration remove lipoxygenase, select the hyperfiltration film of molecular weight cut-off 80-120kD, carry out hyperfiltration process to the linseed oil after filtering;

F, uv irradiating, the linseed oil after filtration flows through the irradiating unit that ultraviolet lamp is settled in top, and irradiation dose is 300-400J/m ², irradiation time is 15 seconds.

The present invention can be used for special oil and produces, and is applicable to nutritive value and health care's edible fat production, accomplishes pollution-free, less energy-consumption.

Claims (3)

1. produce a working method for linseed oil, it is characterized in that comprising the steps:

A, airing is carried out to linseed oil, control water ratio 3%-5%;

B, the linseed kernel dried put into freezing 3 ~ 9 hours of the refrigerated tank of-25 DEG C, to be placed in the vacuum environment of-10 DEG C 3 ~ 8 hours, be finally placed in 40 ~ 60 DEG C of vacuum environment drying treatment 2 ~ 7 hours;

C, the linseed kernel pulverizing will obtained after B, process, sieve by 20 ~ 40 mesh sieve;

D, CO ₂supercritical extraction, fluid extraction pressure is 35 ~ 45MPa, extraction temperature 35 ~ 45 DEG C, CO ₂fluid flow rate is 800 ~ 1100L/h, and extraction time is 40 ~ 100 minutes, obtains linseed kernel slightly oily;

E, hyperfiltration remove lipoxygenase, select the hyperfiltration film of molecular weight cut-off 80-120kD, carry out hyperfiltration process to the linseed oil after filtering;

F, uv irradiating, the linseed oil after filtration flows through the irradiating unit that ultraviolet lamp is settled in top, and irradiation dose is 300-400J/m2, and irradiation time is 10-20 second.

2. linseed oil supercritical extraction process according to claim 1, is characterized in that, adopts 30 mesh sieve to sieve in C, step.

3. linseed oil supercritical extraction process according to claim 1 and 2, is characterized in that, the molecular weight cut-off of the hyperfiltration film adopted in E, step is 100kD.