CN115261132A - Soybean blend oil with oxidation resistance and balanced nutrition and preparation method thereof - Google Patents
Soybean blend oil with oxidation resistance and balanced nutrition and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B5/00—Preserving by using additives, e.g. anti-oxidants
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/007—Other edible oils or fats, e.g. shortenings, cooking oils characterised by ingredients other than fatty acid triglycerides
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/02—Other edible oils or fats, e.g. shortenings, cooking oils characterised by the production or working-up
- A23D9/04—Working-up
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/02—Pretreatment
- C11B1/04—Pretreatment of vegetable raw material
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/06—Production of fats or fatty oils from raw materials by pressing
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
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Abstract
The invention provides soybean blend oil with oxidation resistance and balanced nutrition and a preparation method thereof, wherein the preparation method comprises the following steps: selecting soybeans, corns, sunflower seeds and flaxseeds which are full and uniform in size; pretreating soybean, corn, sunflower seed and flaxseed by using a fluidized bed dryer, cooling by using a cooling machine, and peeling by using a peeling machine to obtain a soybean raw material, a corn raw material, a sunflower seed raw material and a flaxseed raw material; parching the peeled soybean raw material, corn raw material, sunflower seed kernel raw material and linseed raw material, then drying, squeezing, sequentially filtering, degumming, deacidifying, decolorizing and deodorizing the squeezed crude oil to obtain refined soybean oil, corn oil, sunflower oil and linseed oil; mixing refined soybean oil, corn oil, sunflower oil and linseed oil, stirring, and standing to obtain the blend oil. The blend oil prepared by the invention has the advantages of good oxidation resistance, balanced nutrition and low price.
Description
The technical field is as follows:
the invention relates to the technical field of food, in particular to soybean blend oil with oxidation resistance and balanced nutrition and a preparation method thereof.
Background art:
with the rapid development of the economy of China and the annual improvement of the living standard of people, the requirements of people on the quality of edible oil are continuously improved. Edible oil and fat is a component of human diet and also a main source of energy required by human bodies and essential fatty acids, and the fatty acids are divided into three main categories: saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids. Nutrition research proves that the high intake of saturated fatty acid can increase the risk of obesity and cardiovascular diseases, the monounsaturated fatty acid and polyunsaturated fatty acid are beneficial to human health, and the alpha-linolenic acid has the effects of preventing and relieving hyperlipidemia, hypertension, obesity, atherosclerosis, myocardial infarction, cerebral infarction, stroke, senile dementia and the like. The edible oil for daily consumption of people mainly comprises: the single oil product such as corn oil, sunflower seed oil, peanut oil, soybean oil, rapeseed oil and the like, which is often eaten by a single vegetable oil, can cause the insufficient intake or the excessive intake of one or more fatty acids, thereby causing the metabolic balance in the human body to be changed and causing various diseases. The intake of various fatty acids in a scientifically, reasonably and evenly balanced manner is essential for maintaining the health of human beings.
Soybean oil is an oil extracted from soybeans as a pressing raw material, and is one of the most commonly used cooking oils. The ratio of omega-6 fatty acids to omega-3 fatty acids in soybean oil is about 8:1. the Chinese Nutrition society recommends and internationally relatively recognizes that the ratio of omega-6: omega-3 = (4-6): 1 in polyunsaturated fatty acids. The main component of soybean oil is unsaturated fatty acid, which is easy to be oxidized and deteriorated. Oxidation of fats and oils is one of the main causes of deterioration in the quality of vegetable oils, and oxidation of fats and oils deteriorates the color and flavor of fats and oils, and also lowers the nutritional value of fats and oils and produces harmful substances. Therefore, the preparation of the soybean blend oil with good oxidation resistance and balanced nutrition is very important.
The invention content is as follows:
the invention aims to solve the technical problem of providing the soybean blend oil with oxidation resistance and balanced nutrition and the preparation method thereof aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of soybean blend oil with oxidation resistance and balanced nutrition comprises the following steps:
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating soybean, corn, sunflower seed and linseed by using a fluidized bed dryer, then cooling by using a cooler, and finally treating by using a huller and a wind selector to obtain hulled soybean oil seeds, corn oil seeds, sunflower oil seeds and linseed oil seeds;
(3) Respectively frying peeled soybean oil seeds, corn oil seeds, sunflower oil seeds and linseed oil seeds, then drying and squeezing, sequentially filtering, degumming and deacidifying crude oil obtained by squeezing, then adding activated clay for decoloring, and finally entering a deodorization tower for deodorizing to obtain refined soybean oil, corn oil, sunflower oil and linseed oil;
(4) Mixing the refined soybean oil, corn oil, sunflower oil and linseed oil at a certain ratio, stirring, and standing to obtain the blend oil.
As a preferable technical scheme, in the step (2), the pretreatment is carried out for 20-30min at 100-120 ℃; the heated material enters a cooler, the size of an air door of the cooler is adjusted to enable the temperature of the material to reach 4-7 ℃, and the skin and the material of the material are separated by the principle of expansion with heat and contraction with cold; removing peel by a peeling machine.
As a preferable technical solution, in the step (3), the stir-frying conditions are as follows: parching at 90-100 deg.C for 50-60min; the drying condition is 60-70 ℃, and the drying time is 3-4h.
As a preferable technical scheme, in the step (3), continuous hydration degumming is adopted during degumming, the degumming temperature is 80-90 ℃, the mass ratio of water to oil during degumming is 1:8-1, and when the separated oil foot is brown viscose during hydration degumming, the hydration degumming is finished.
As a preferable technical scheme, in the step (3), the alkali used for the alkalization deacidification is sodium hydroxide solution with the concentration of 10-14 Be, the time is 1h, and the temperature is 50-60 ℃.
As a preferable technical scheme, in the step (3), the adding amount of activated clay is 1-3% during the decoloring treatment, the temperature of the decoloring treatment is 120 ℃, and the time is 20-40min.
As a preferable technical scheme, in the step (3), the temperature of the deodorization treatment is 150-160 ℃, the time is 1h, and the vacuum degree is-0.092 MPa.
As a preferable technical scheme, in the step (4), the temperature of the mixing and stirring treatment is 25-35 ℃, the stirring speed is 120-150r/min, and the time is 5-10min; the standing time is 1-3h.
As a preferable technical scheme, in the step (4), the components are 50-65 parts by weight of soybean oil, 13-20 parts by weight of corn oil, 14-20 parts by weight of sunflower oil and 7-10 parts by weight of linseed oil.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the invention, the self-made refined soybean oil, refined sunflower oil, refined corn oil and refined linseed oil are mixed and compounded, the use amount of each component is effectively adjusted, the prepared soybean blend oil has balanced nutrition and good oxidation resistance, the proportion of the soybean oil accounts for more than half, and the cost of the blend oil is greatly reduced.
When the soybean oil, the sunflower oil, the corn oil and the linseed oil are refined, the selected soybean, the corn kernels, the sunflower kernels and the linseed are subjected to hot-cold alternate treatment by adopting a fluidized bed dryer and a cooler in sequence, and the peels and the materials of the materials are separated by the principle of expansion with heat and contraction with cold, so that the subsequent peeling treatment is convenient. The invention respectively carries out stir-frying and drying treatment on peeled soybeans, corn kernels, sunflower and flaxseeds, effectively controls stir-frying and drying conditions, effectively removes beany flavor of the soybean blend oil and improves the taste of the blend oil.
The specific implementation mode is as follows:
in order to better understand the present invention, the following examples further illustrate the invention, the examples are only used for explaining the invention, not to constitute any limitation of the invention.
Example 1
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 100 deg.C for 20min; then, a cooling machine is used to ensure that the temperature of the materials reaches 4 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of thermal expansion and cold contraction; removing oil coat with a huller and a pneumatic separator to obtain hulled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively parching the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed at 90 deg.C for 50min; then drying at 60 ℃ for 3h, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 80 ℃ and under the condition that the water-oil ratio is 1:8, then carrying out alkalization deacidification at the temperature of 60 ℃ for 1h, finally adding 1% of activated clay into the deacidified oil, and carrying out treatment at 120 ℃ for 30min; respectively feeding the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 150 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 50 parts of refined soybean oil, 20 parts of refined corn oil, 20 parts of refined sunflower oil and 10 parts of refined linseed oil are stirred for 5min at the temperature of 25 ℃ and the rotating speed of 120r/min, and then standing treatment is carried out for 2h, so that the soybean blend oil with oxidation resistance and balanced nutrition is prepared.
Example 2
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in grains and uniform in size through a gravity grading and stoning machine, a specific gravity fine screening machine and a coarse cereal color sorting machine;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 105 deg.C for 25min; then, a cooler is used to ensure that the temperature of the material reaches 5 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of expansion with heat and contraction with cold; removing the peel by using a peeling machine and a wind separator to obtain peeled soybean oil seeds, corn oil seeds, sunflower oil seeds and linseed oil seeds;
(3) Respectively placing the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed in a concocting pot, and parching at 95 deg.C for 55min; then drying the oil seeds at 65 ℃ for 3h respectively, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 85 ℃ and under the condition that the water-oil ratio is 1:9, then carrying out alkalization deacidification at 60 ℃ for 1h, finally adding 2% of activated clay into the deacidified oil, and carrying out treatment at 120 ℃ for 30min; respectively feeding the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 155 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 55 parts of refined soybean oil, 18 parts of refined corn oil, 18 parts of refined sunflower oil and 9 parts of refined linseed oil are stirred for 6min at the temperature of 30 ℃ and the rotating speed of 125r/min, and then the mixture is kept stand for 2h, so that the soybean blend oil with the oxidation resistance and balanced nutrition is prepared.
Example 3
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 110 deg.C for 30min; then, a cooler is used to ensure that the temperature of the material reaches 6 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of expansion with heat and contraction with cold; removing oil coat with a huller and a pneumatic separator to obtain hulled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively parching the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed at 100 deg.C for 60min; then drying for 4h at 70 ℃, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the squeezed crude oil by a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 90 ℃ under the condition that the water-oil ratio is 1; respectively placing the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 160 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) 60 parts of refined soybean oil, 16 parts of refined corn oil, 16 parts of refined sunflower oil and 8 parts of refined linseed oil are stirred for 6min at the temperature of 35 ℃ and the rotating speed of 140r/min in parts by weight, and then the mixture is kept stand for 2h to prepare the soybean blend oil with oxidation resistance and balanced nutrition.
Example 4
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 120 deg.C for 25min; then, a cooling machine is used to ensure that the temperature of the materials reaches 7 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of thermal expansion and cold contraction; removing oil coat with a huller and a pneumatic separator to obtain hulled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively placing the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed in a concocting pot, and parching at 95 deg.C for 55min; then drying at 60 ℃ for 3.5h, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 85 ℃ under the condition that the water-oil ratio is 1; respectively feeding the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 155 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 65 parts of refined soybean oil, 14 parts of refined corn oil, 14 parts of refined sunflower oil and 7 parts of refined linseed oil are stirred for 5min at the temperature of 25 ℃ and the rotating speed of 150r/min, and then standing treatment is carried out for 2h, so that the soybean blend oil with oxidation resistance and balanced nutrition is prepared.
Comparative example 1
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 85 deg.C for 30min; then, a cooler is used to ensure that the temperature of the material reaches 15 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of expansion with heat and contraction with cold; removing oil coat with a huller and a pneumatic separator to obtain hulled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively placing the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed in a concocting pot, and parching at 100 deg.C for 65min; then drying at 35 ℃ for 1h, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 100 ℃ and under the condition that the water-oil ratio is 1:7, then carrying out alkalization deacidification at 70 ℃ for 1h, finally adding 0.5% of activated clay into the deacidified oil, and carrying out treatment at 120 ℃ for 30min; respectively feeding the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 165 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 10 parts of refined soybean oil, 20 parts of refined corn oil, 30 parts of refined sunflower oil and 40 parts of refined linseed oil are stirred for 5min at the temperature of 25 ℃ and the rotating speed of 120r/min, and then standing is carried out for 2h, so as to obtain the soybean blend oil.
Comparative example 2
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer, wherein the heating temperature is 90 ℃ and the time is 35min; then, a cooling machine is used to ensure that the temperature of the materials reaches 15 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of thermal expansion and cold contraction; removing oil coat with a huller and a pneumatic separator to obtain hulled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively parching the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed at 85 deg.C for 45min; then drying the oil seeds for 1 hour at 35 ℃, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 90 ℃ and under the condition that the water-oil ratio is 1:7, then carrying out alkalization deacidification for 1 hour at the temperature of 70 ℃, finally adding 4% of activated clay into the deacidified oil, and carrying out treatment for 30 minutes at 120 ℃; respectively placing the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 145 deg.C under vacuum degree of-0.092 MPa for 1h to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 20 parts of refined soybean oil, 30 parts of refined corn oil, 40 parts of refined sunflower oil and 10 parts of refined linseed oil are stirred for 8min at the temperature of 35 ℃ and the rotating speed of 130r/min, and then standing is carried out for 2h, so as to obtain the soybean blend oil.
Comparative example 3
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 85 deg.C for 40min; then, a cooler is used to ensure that the temperature of the material reaches 15 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of expansion with heat and contraction with cold; removing oil coat with a peeler and a wind separator to obtain peeled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively placing the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed in a concocting pot, and parching at 85 deg.C for 65min; then drying the oil seeds at 35 ℃ for 0.5h respectively, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 95 ℃ and at the water-oil ratio of 1; respectively feeding the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 165 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 30 parts of refined soybean oil, 40 parts of refined corn oil, 10 parts of refined sunflower oil and 20 parts of refined linseed oil are stirred for 6min at the temperature of 30 ℃ and the rotating speed of 140r/min, and then standing is carried out for 2h, so as to obtain the soybean blend oil.
Comparative example 4
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in particles and uniform in size through a gravity grading stone remover, a specific gravity fine selector and a coarse cereal color selector;
(2) Respectively pretreating 4 vegetable oil materials with a fluidized bed dryer at 95 deg.C for 30min; then, a cooler is used to ensure that the temperature of the material reaches 15 ℃, and the epidermis of the vegetable oil is easier to remove by the principle of expansion with heat and contraction with cold; removing oil coat with a peeler and a wind separator to obtain peeled soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed;
(3) Respectively placing the obtained soybean oil seed, corn oil seed, sunflower oil seed and linseed oil seed in a concocting pot, and parching at 100 deg.C for 60min; then drying the oil seeds at 35 ℃ for 0.5h respectively, finally squeezing the dried 4 oil seeds respectively, controlling the residual oil rate to be below 7.5%, filtering the crude oil obtained by squeezing through a plate filter, carrying out hydration degumming treatment on the filtered crude oil at 85 ℃ and at the water-oil ratio of 1; respectively placing the degummed, deacidified and decolorized four vegetable oils into a deodorizing tower, deodorizing at 160 deg.C under vacuum degree of-0.092 MPa for 1 hr to obtain refined soybean oil, refined corn oil, refined sunflower oil and refined linseed oil;
(4) According to parts by weight, 40 parts of refined soybean oil, 10 parts of refined corn oil, 20 parts of refined sunflower oil and 30 parts of refined linseed oil are stirred for 5min at the temperature of 25 ℃ and the rotating speed of 150r/min, and then standing is carried out for 2h, so as to obtain the soybean blend oil.
The performance tests of the soybean blend oils prepared in the above examples and comparative examples are described below.
1. Fatty acid composition
The compositions of the soybean blend oil fatty acids prepared in the above examples and comparative examples were measured by a gas mass spectrometer, and the results are shown in table 1.
TABLE 1
| ω-6∶ω-3 | |
| Example 1 | 5.8：1 |
| Example 2 | 6.0：1 |
| Example 3 | 5.2：1 |
| Example 4 | 5.9：1 |
| Comparative example 1 | 2.0：1 |
| Comparative example 2 | 7.9：1 |
| Comparative example 3 | 3.9：1 |
| Comparative example 4 | 2.5：1 |
As can be seen from the test results in Table 1, the blend oils of examples 1-4 all have a ratio of 4-6 omega-3 fatty acids to 4-6 omega-3 fatty acids: 1, according with the recommended amount of fatty acid proportion of Chinese Nutrition society. The unbalanced ratio of omega-6 to omega-3 fatty acids in the soybean blend oils prepared in the comparative examples 1-4 does not meet the recommended amount of fatty acid ratio in the Chinese society of nutrition, and is not good for human health.
2. Oxidation resistance
The oxidation stability of the soybean blend oils obtained in the above examples and comparative examples was measured using a Rancimat 892 model oil oxidation stability analyzer under conditions of a temperature of 120 ℃ and an intake air amount of 18L/h, and the results are shown in Table 2.
TABLE 2
As can be seen from the test results in Table 2, compared with the comparative example, the soybean blend oil prepared by the invention has higher DPPH free radical scavenging capability, the DPPH whole oil reaches 230mol TE/100g, the DPPH polarity reaches more than 70mol TE/100g, and the DPPH nonpolar is 170mol TE/100g, and the soybean blend oil prepared by the example has better oxidation stability, and reaches more than 3h.
3. Physical and chemical properties
The physical and chemical properties of the soybean blend oils obtained in the examples and comparative examples are shown in table 3.
TABLE 3
As can be seen from the test results in table 3, the soybean blend oil prepared according to the present invention has no beany flavor and better mouthfeel compared to the comparative example.
4. Tocopherol content
The tocopherol contents of the soybean blend oils prepared in examples and comparative examples are shown in table 4.
TABLE 4
As can be seen from the test results in Table 4, the delta-tocopherol content as well as the gamma-tocopherol content of the soybean blend oil produced according to the present invention was higher than that of the comparative example.
In conclusion, the soybean blend oil prepared by the invention takes the soybean oil as the main raw material, has low price, no beany flavor, good taste, rich nutrition and excellent oxidation resistance.
Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the claims appended to the present application.
Claims (10)
1. A preparation method of soybean blend oil with oxidation resistance and balanced nutrition is characterized by comprising the following steps:
(1) Respectively selecting soybeans, corns, sunflower seeds and flaxseeds which are full in grains and uniform in size through a gravity grading and stoning machine, a specific gravity fine screening machine and a coarse cereal color sorting machine;
(2) Respectively pretreating soybean, corn, sunflower seed and linseed by using a fluidized bed dryer, then cooling by using a cooler, and finally treating by using a huller and a wind selector to obtain hulled soybean oil seeds, corn oil seeds, sunflower oil seeds and linseed oil seeds;
(3) Respectively frying peeled soybean oil seeds, corn oil seeds, sunflower oil seeds and linseed oil seeds, then drying and squeezing, sequentially filtering, degumming and deacidifying crude oil obtained by squeezing, then adding activated clay for decoloring, and finally entering a deodorization tower for deodorizing to obtain refined soybean oil, corn oil, sunflower oil and linseed oil;
(4) Mixing refined soybean oil, corn oil, sunflower seed oil and linseed oil in a certain proportion, stirring, and standing to obtain the blend oil.
2. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein in the step (2), the pretreatment is that the material is treated at 100-120 ℃ for 20-30min; the heated material enters a cooler, and the size of an air door of the cooler is adjusted to enable the temperature of the material to reach 4-7 ℃.
3. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein in the step (3), the stir-frying conditions are as follows: parching at 90-100 deg.C for 50-60min; the drying condition is 60-70 ℃, and the drying time is 3-4h.
4. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition according to claim 1, wherein in the step (3), continuous hydration degumming is adopted during degumming, the degumming temperature is 80-90 ℃, and the mass ratio of water to oil during degumming is 1:8-1.
5. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein in the step (3), the alkali used for alkalization deacidification is sodium hydroxide solution with concentration of 10-14 ° Be, time of 1h and temperature of 50-60 ℃.
6. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein in the step (3), the adding amount of activated clay is 1-3% during the decolorization treatment, the temperature of the decolorization treatment is 120 ℃, and the time is 20-40min.
7. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein the temperature of the deodorization treatment in the step (3) is 150-160 ℃, the time is 1h, and the vacuum degree is-0.092 MPa.
8. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition according to claim 1, wherein in the step (4), the temperature of the mixing and stirring treatment is 25-35 ℃, the stirring speed is 120-150r/min, and the time is 5-10min; the standing time is 1-3h.
9. The method for preparing soybean blend oil with oxidation resistance and balanced nutrition as claimed in claim 1, wherein in the step (4), the amount of each component is 50-65 parts by weight of soybean oil, 13-20 parts by weight of corn oil, 14-20 parts by weight of sunflower oil and 7-10 parts by weight of linseed oil.
10. A soybean blend oil having antioxidant and balanced nutrition, characterized by being prepared by the method of any one of claims 1 to 9.
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