CN105038975A - Supercritical extraction process for rapeseed oil - Google Patents

Abstract

The invention provides a supercritical extraction process for rapeseed oil; the rapeseed oil is obtained through steps of CO2 supercritical extraction and hyperfiltration. According to the supercritical extraction process, especially in the refining process of the rapeseed oil, no chemical reagents are added; as refining is performed by adopting a pure physical method, the obtained rapeseed oil reserves specific active substances, such as flavonoids, rapeseed acid and Vitamin E, of rapeseeds, and is free of residual solvent and pollution, high in safety and high in oil product quality. As no chemical reagents are added in the refining process, no chemical reagents remain, and the rapeseed oil can be used as excellent high-end edible oil and cosmetics or pharmaceutical additives; the rapeseed oil extracted by the supercritical extraction process provided by the invention smells fragrant and is particular in flavor, can be widely suitable for cooking various foods and dishes, has higher nutritive value and a health-care effect, reserves high-antioxidant active ingredients, and is especially suitable for being popularized in the technical field of small-batch production of special oil.

Description

Rapeseed oil supercritical extraction process

Technical field

The present invention relates to a kind of method of rapeseed 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

Rapeseed oil is one of traditional edible vegetable oil of China; be of high nutritive value; be easy to absorption of human body; its main component is triacylglycerol; in addition also containing micro-nutrient compositions such as polyphenol from rapeseed, tocopherol, plant brassicasterol and polyphenol from rapeseed; these nutritive ingredients have multiple physiologically active and nourishing function, and its stronger anti-oxidant activity to vegetable seed oil oxidation stability also

Play positive provide protection.

Traditional rapeseed oil manufacture craft is divided into mechanical expression and solvent extraction two kinds, mechanical expression technique adopts physical impact mode, the method that grease is squeezed out from vegetable seed, be divided into again hot moulding and cold press two kinds, general hot moulding meeting havoc vegetable seed cell, can destroy the nutritive ingredient in oil after high temperature, reduce nutritive value and the quality of rapeseed oil, and pressed oil oxidative stability is not very desirable, and oil yield is low, and in cake, Residual oil is high.

Therefore, further investigation and exploitation rapeseed Processing technology, promote rapeseed oil quality and nutritive value, improve the oil yield of vegetable seed, improve vegetable seed oil oxidation stability, thus promote that China's rape processing technology progress and Rape industry sound development become very important and urgent task.

In order to solve Problems existing in current rapeseed oil production process, retaining original nutritive ingredient such as Semen Brassicae campestris acid and vitamin-E in rapeseed oil to greatest extent, reducing and avoid the formation of trans fatty acid, guarantee the nutrition of rapeseed oil product, safety; Improve quality product and yield, reduce energy consumption and waste discharge, achieve the impairment synergy that rapeseed oil is produced.Be badly in need of a kind of rapeseed oil production and processing method.

Summary of the invention

The object of the present invention is to provide the rapeseed 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 Semen Brassicae campestris, control water ratio 3%-5%;

B, the rape seed 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 rape seed 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 rape seed slightly oily;

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

F, uv irradiating, the rapeseed 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 rapeseed oil production technique, particularly in the refining process of rapeseed oil, do not add chemical reagent, pure physical method is adopted to carry out refining, the rapeseed oil obtained remains the distinctive Flavonoid substances of Semen Brassicae campestris 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 simultaneously extracted is more shallow than pressed oil rapeseed 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 rapeseed oil storage process and causes rotten biotic factor; Oxygenase in rapeseed oil, in storage process, the double bond fracture in the unsaturated fatty acids in catalyzed oxidation rapeseed oil, produces the smell substances such as aldehyde ketone and produces, and rapeseed 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 Semen Brassicae campestris, eliminate in rapeseed 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 rapeseed 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 rapeseed 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 rapeseed oil production technique:

A, airing is carried out to rape seed, control water ratio 4%;

B, the rape seed 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 rape seed 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 rape seed slightly oily;

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

F, uv irradiating, the rapeseed 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 (2)

1. produce oil the working method of rapeseed oil, it is characterized in that comprising the steps:

A, airing is carried out to Semen Brassicae campestris, control water ratio 3%-5%;

B, the rape seed 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 rape seed 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 rape seed slightly oily;

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

F, uv irradiating, the rapeseed 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. rapeseed oil supercritical extraction process according to claim 1, is characterized in that, adopts 30 mesh sieve to sieve in C, step.