CN111304006A - Preparation method of high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid and product - Google Patents
Preparation method of high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid and product Download PDFInfo
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- CN111304006A CN111304006A CN202010139402.5A CN202010139402A CN111304006A CN 111304006 A CN111304006 A CN 111304006A CN 202010139402 A CN202010139402 A CN 202010139402A CN 111304006 A CN111304006 A CN 111304006A
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
Abstract
The invention discloses a preparation method of high-quality triglyceride with a medium-long carbon chain structure and rich in α -linolenic acid and a product, which comprises the steps of uniformly mixing medium-carbon chain triglyceride and refined linseed oil, removing excessive water in raw materials through vacuum drying to obtain a refined linseed oil mixture with the medium-carbon chain triglyceride, adding sodium methoxide into the refined linseed oil mixture with the medium-carbon chain triglyceride, reacting for a certain time under the condition of stirring, stopping heating and stirring, adding hot water to stop the reaction, washing to be neutral, and performing vacuum drying to obtain a high-quality triglyceride product with the medium-long carbon chain structure and rich in α -linolenic acid.
Description
Technical Field
The invention belongs to the technical field of deep processing of grease, and particularly relates to a preparation method of high-quality triglyceride with a medium-long carbon chain structure and rich in α -linolenic acid and a product.
Background
MLCT (triglyceride with medium and long carbon chains) is taken as a special structural lipid, and long-term clinical experimental research shows that the MLCT has no toxic or side effect on human bodies and is widely applied to the food and medicine industries. In the food industry, MLCT can be used as cooking oil, margarine, shortening, and the like. In the pharmaceutical industry, MLCT plays a more important role, mainly as a new type of intravenous emulsion.
The linseed oil is natural vegetable oil extracted from mature linseed, and has the obvious characteristics of rich unsaturated fatty acid content, especially n-3 series as the main component, wherein α -linolenic acid content is more than 40%, oleic acid and linoleic acid respectively account for 19.3% -9.4% and 14.0% -18.2%, and total unsaturated fatty acid content is more than 85%.
α -linolenic acid is a synthetic precursor of polyunsaturated fatty acid such as EPA, DHA necessary for human body, can be converted into other polyunsaturated fatty acid by enzyme catalysis in human body for absorption and utilization, because the fat intake of the resident diet in China is mainly soybean oil and rapeseed oil, the intake of n-3 series fatty acid is insufficient, the intake of α -linolenic acid has very important significance for human health, linseed oil contains rich essential fatty acid for human body, and has various physiological activities of reducing blood fat, reducing blood pressure, resisting tumor, preventing kidney and liver damage, preventing Alzheimer's disease and cardiovascular and cerebrovascular diseases.
At present, most products rich in α -linolenic acid are obtained by physical blending or adding exogenous α -linolenic acid, and patents for improving the biological absorption and utilization of the products by combining α -linolenic acid with medium-chain fatty acid are not published.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, the invention aims to overcome the defects in the prior art and provide a preparation method of triglyceride rich in α -linolenic acid with medium-long carbon chain structure.
The invention provides a preparation method of medium and long carbon chain structure triglyceride rich in α -linolenic acid, which comprises the following steps of uniformly mixing medium and long carbon chain triglyceride with refined linseed oil, removing excessive water in raw materials through vacuum drying to obtain a medium and long carbon chain triglyceride refined linseed oil mixture, adding sodium methoxide into the medium and long carbon chain triglyceride refined linseed oil mixture, reacting for a certain time under the condition of stirring, stopping heating and stirring, adding hot water to stop the reaction, washing to be neutral, and performing vacuum drying to obtain a high-quality medium and long carbon chain structure triglyceride product rich in α -linolenic acid.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure rich in α -linolenic acid, the refined linseed oil meets the quality standard of the primary refined linseed oil in the linseed oil with GB/T8235-2019, and the content of α -linolenic acid is more than 45%.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, the medium-carbon chain triglyceride is refined medium-carbon chain triglyceride, wherein the content of medium-carbon chain fatty acid rich in caprylic acid, capric acid and lauric acid is more than 90%, the acid value is not more than 0.1mgKOH/g, and the peroxide value is not more than 1 mmol/kg.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure rich in α -linolenic acid, the medium-chain triglyceride and the refined linseed oil are uniformly mixed, wherein the addition amount of the linseed oil accounts for 40-70% of the total mass percentage of the medium-chain triglyceride and the refined linseed oil.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, the excessive water in the raw material is removed by vacuum drying, wherein the vacuum drying temperature is 75-95 ℃, and the time is 25-60 min.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, sodium methoxide is added into the refined linseed oil mixture containing the medium-long carbon chain triglyceride, wherein the addition amount of the sodium methoxide is 0.2-0.4%.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, the heating and stirring are stopped after the reaction is carried out for a certain time, wherein the reaction temperature is 40-70 ℃, and the reaction time is 15-60 min.
As a preferable scheme of the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, the stirring rotating speed is 200-800 r/min.
The preferable scheme of the method for preparing the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid is that the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid is obtained by vacuum drying, wherein the drying temperature is 60-90 ℃, and the vacuum degree is 0.05-0.1 MPa.
The invention also aims to overcome the defects in the prior art and provide a product prepared by the preparation method of triglyceride rich in α -linolenic acid with medium-long carbon chain structure.
In order to solve the technical problems, the invention provides the following technical scheme that the product is prepared by the preparation method of the high-quality triglyceride with the medium-long carbon chain structure and rich in α -linolenic acid, wherein the MLCT content in the product reaches 40-75%, and the α -linolenic acid content in the product reaches 20-40%.
The invention has the beneficial effects that:
(1) the invention provides a preparation method of high-quality triglyceride with a medium-long carbon chain structure, which focuses on the content of α -linolenic acid in triglyceride with a medium-long carbon chain structure (MLCT) for the first time, provides a product which is rich in fatty acid (α -linolenic acid) beneficial to health in the MLCT, produces a product which is rich in both MLCT and α -linolenic acid, is beneficial to human health, has the MLCT content of 40-75 percent and the α -linolenic acid content of more than 20 percent.
(2) The invention has simple production process and strong operability, and meets the requirement of actual production.
(3) In the process of preparing the high-quality triglyceride with the medium-long carbon chain structure rich in α -linolenic acid, the invention pays attention to the indexes of the content, the acid value and the peroxide value of the diglyceride, and has better product quality and wide application range.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The evaluation indexes of the invention include MLCT content, DAG content, acid value, peroxide value and α -linolenic acid content, wherein,
(1) MLCT content, DAG content determination: measuring by high performance liquid chromatography;
(2) α -linolenic acid content, refer to GB 5009.168-2016 determination of fatty acid in national food safety Standard;
(3) acid value: refer to GB5009.229-2016 determination of acid value in food safety national standard food;
(4) peroxide number: refer to GB5009.227-2016, determination of peroxide value in food safety national standard food.
The refined linseed oil in the embodiment of the invention meets the quality standard of the primary refined linseed oil in GB/T8235-2019 linseed oil, the content of α -linolenic acid is more than 45%, and the specific indexes are as follows:
smell and taste: has the inherent odor and taste of crude oil of semen Lini, and has no peculiar smell
Moisture and volatile content/%: less than or equal to 0.50
Insoluble impurities content/%: less than or equal to 0.50
Color: light yellow to yellow
Smell and taste: has the intrinsic odor and taste of oleum Lini, and has no peculiar smell
Transparency (20 ℃ C.): is transparent
Moisture and volatile content/%: less than or equal to 0.2
Insoluble impurities content/%: less than or equal to 0.05
Acid value (in KOH)/(mg/g): less than or equal to 1.0
The medium-carbon chain triglyceride is refined medium-carbon chain triglyceride, wherein the content of medium-carbon chain fatty acid rich in caprylic acid, capric acid and lauric acid is more than 90%, the acid value is not more than 0.1mgKOH/g, and the peroxide value is not more than 1 mmol/kg.
Example 1
(1) Taking a 250g system with the linseed oil proportion of 60% as an example, taking 100g of medium-chain triglyceride and 150g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa for 30min to obtain the MLCT product.
(3) The product index obtained by measurement is shown in the following table 1.
TABLE 1
Example 2
(1) Taking a 250g system with the linseed oil proportion of 50% as an example, taking 125g of medium-chain triglyceride and 125g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 60 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa for 30min to obtain the MLCT product.
(3) The product index obtained by measurement is shown in the following table 2.
TABLE 2
| MLCT content/%) | α linolenic acid/％ | DAG content/%) | Acid value mg/g | Peroxide number/mmol/kg |
| 71.71 | 32.20 | 10.35 | 0.46 | 1.27 |
Example 3
(1) Taking a 250g system with the linseed oil proportion of 60% as an example, taking 100g of medium-chain triglyceride and 150g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 90 ℃ for 20min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.4% of sodium methoxide catalyst, reacting for 20min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa for 30min to obtain the MLCT product.
(3) The product index obtained by measurement is shown in the following table 3.
TABLE 3
| MLCT content/%) | α -linolenic acid/%) | DAG content/%) | Acid value mg/g | Peroxide number/mmol/kg |
| 72.29 | 32.42 | 14.11 | 0.54 | 1.36 |
Example 4
(1) Taking a 250g system with the linseed oil proportion of 60% as an example, taking 100g of medium-chain triglyceride and 150g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 75 ℃ for 50min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.2% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa for 30min to obtain the MLCT product.
(3) The product index obtained by measurement is shown in the following table 4.
TABLE 4
| MLCT content/%) | α -linolenic acid/%) | DAG content/%) | Acid value mg/g | Peroxide number/mmol/kg |
| 59.06 | 32.77 | 8.63 | 0.40 | 1.03 |
Example 5
(1) Taking a 250g system with the linseed oil proportion of 80% as an example, taking 50g of medium-chain triglyceride and 200g of first-level refined linseed oil, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa for 30min to obtain the MLCT product.
(3) The product index obtained by measurement is shown in the following table 5.
TABLE 5
Example 6
(1) Taking a 250g system with the linseed oil proportion of 60% as an example, taking 100g of medium-chain triglyceride and 150g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying at 110 ℃ for 30min under normal pressure to obtain the MLCT product.
(3) The product indices were determined as shown in Table 6 below.
TABLE 6
As can be seen from Table 6, the peroxide number of the product obtained by normal pressure drying is obviously higher than that of the vacuum drying product, α -linolenic acid is a fatty acid which is sensitive to heat, and is easy to be oxidized and deteriorated under the high temperature condition, the vacuum drying can reduce the influence of the temperature on the quality, and the vacuum drying effect is better than that of normal pressure drying under the same condition (the boiling point of water is reduced under the vacuum condition, the water in the product can be removed more quickly, and the influence of oxygen on α -linolenic acid is isolated), therefore, the vacuum drying effect is better than that of normal pressure drying for the product, and the preferable vacuum drying parameters are 60-90 ℃ and 0.05-0.1 MPa.
Example 7
(1) Ratio of substrates
On the basis of the embodiment 1, taking the first-stage refined linseed oil with the proportion of 40%, 50%, 60%, 70% and 80% respectively by a 250g system, taking the rest medium-carbon chain triglyceride to complement to 250g, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing the redundant water in the raw material;
adjusting the temperature to 50 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the stirring condition of 500r/min, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing with water to be neutral, and drying under vacuum at 90 ℃ and 0.1MPa to obtain an MLCT product, wherein the test results are shown in Table 7.
TABLE 7
From Table 7, it can be seen that the medium-chain fatty acid in the medium-long-chain triglyceride is provided by MCT, the long-chain fatty acid is provided by linseed oil, and the mixture ratio of the medium-long-chain triglyceride and the long-chain fatty acid directly affects the medium-long-chain triglyceride content and the linolenic acid content in the product. α -linolenic acid content is significantly affected by the substrate ratio, the higher the content of the linseed oil in the substrate is, the higher the α -linolenic acid content in the product is, but too much linseed oil can cause the reduction of the MLCT content and also can cause the small increase of the peroxide value and the acid value of the product.
(2) Reaction temperature
The reaction temperatures were 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃ and 90 ℃ respectively based on example 1, and the test results are shown in Table 8.
TABLE 8
The transesterification reaction catalyzed by sodium methoxide is used as a chemical catalytic reaction, the temperature cannot be too low, and the temperature must reach the minimum temperature required by the activation energy of the reaction. As can be seen from Table 8, the linolenic acid content of the products obtained at different temperatures does not change much, the MLCT content shows a trend of increasing-decreasing-basically not changing, the DAG, the peroxide number and the acid value are continuously increased along with the increase of the temperature, and the temperature is increased obviously when the temperature exceeds 80 ℃, and the preferred temperature of the invention is 40-70 ℃.
(3) Catalyst addition
The amounts of the catalysts added were 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% in example 1, and the test results are shown in Table 9.
TABLE 9
As can be seen from table 9, the amount of catalyst mainly affects the MLCT content of the product, with the increase of the amount of catalyst, the MLCT content of the product tends to increase significantly first and then to be almost unchanged, and sodium methoxide shows a high-efficiency catalytic effect, but when reaching a certain amount, the catalyst is continuously increased, so that the MLCT content cannot be further increased, and the DAG as a byproduct is increased. The catalyst has the advantages of high linolenic acid content, high acid value and high peroxidation value of the product. Therefore, in order to ensure the MLCT content, the invention preferably adds 0.2-0.4% (by mass of the substrate) of the catalyst.
(4) Reaction time
On the basis of example 1, the reaction time was 5min, 10min, 15min, 20min, 40min, 60min and 80min, respectively, and the test results are shown in Table 10.
Watch 10
As can be seen from Table 10, the MLCT content of the obtained product shows a tendency of first increasing remarkably and then almost unchanged; the DAG content shows a continuous increasing trend, and when the reaction time exceeds 80min, the increase of the DAG content is more obvious than that of the prior period; the acid value and the peroxide value both show a slow increasing trend; the linolenic acid content has no obvious difference. In order to ensure the content of MLCT and avoid overhigh DAG, peroxide value and acid value, the optimal reaction time of the method is 15-60 min.
Example 8
(1) Taking a 250g system with the linseed oil proportion of 60% as an example, taking 100g of medium-chain triglyceride and 150g of primary refined linseed oil, uniformly mixing, carrying out vacuum drying at 80 ℃ for 30min, and removing excessive water in the raw materials.
(2) Adjusting the temperature to 50 ℃, adding 0.3% of sodium methoxide catalyst, reacting for 30min under the condition of stirring, stopping heating and stirring, adding hot water (softened water) to stop the reaction, washing to be neutral, and drying in vacuum (90 ℃, 0.1MPa, 30min) to obtain the MLCT product. Wherein the vacuum drying parameters are respectively set as:
test 1: drying at 60 deg.C under vacuum degree of 0.05MPa for 110 min;
test 2: drying at 90 deg.C under vacuum degree of 0.05MPa for 85 min;
test 3: drying at 50 deg.C under vacuum degree of 0.05MPa for 180 min;
test 4: drying at 100 deg.C under vacuum degree of 0.1MPa for 60 min;
test 5: drying at 80 deg.C under vacuum degree of 0.1MPa for 95 min.
TABLE 11
The product is a structural ester product rich in α -linolenic acid, the fatty acid unsaturation degree is high, and a vacuum drying process is adopted, so that a product with more excellent quality is obtained, and the product is particularly suitable for rotary vacuum drying, the heating area of materials is increased, the vacuum drying efficiency is improved, the working efficiency is considered, the overlong drying time caused by overlow temperature is avoided, and the vacuum drying temperature is preferably 60-90 ℃ and the vacuum degree is preferably 0.05-0.1 MPa.
The inventors have further studied and found that the transesterification reaction in a solvent-free system catalyzed by sodium methoxide is highly viscous, and the efficiency of the reaction is greatly reduced without stirring. And if the stirring is insufficient, the reaction efficiency is too low, the stirring speed is too high, the generation amount of reaction products cannot be increased, and the preferable stirring speed is 200-800 r/min.
The method takes the MLCT content and the DAG content as evaluation indexes, obtains proper chemical catalytic ester exchange parameters through optimization, produces the triglyceride with the medium-long chain structure of the grease with high MLCT content, low DAG content and rich α -linolenic acid, and has the advantages that the product is rich in natural plant source n-3 polyunsaturated fatty acid (α linolenic acid), the α -linolenic acid content reaches more than 20 percent, the price of the chemical method ester exchange is lower than that of the enzyme method ester exchange, the operation is easy, the applicability is strong, the reaction is stable, the temperature is low, the MLCT content of the product reaches 40 to 75 percent, and the α -linolenic acid content reaches more than 20 percent.
The invention emphasizes the content of n-3 polyunsaturated fatty acid (α -linolenic acid) and beneficial effects thereof in a long carbon chain in the structure, namely, the conventional MLCT product does not pay attention to α -linolenic acid, namely n-3 series fatty acid in the product, however, α -linolenic acid has poor stability, so that the invention optimizes DAG (diglyceride) content (the existence of DAG affects the quality of the product and is lower and more suitable) as a quality index at the same time under a drying condition to ensure the quality of the product because the drying process is likely to cause adverse side reaction, namely oxidation.
The product prepared by the invention has the indexes that MLCT is obtained as much as possible by optimizing process conditions from the viewpoint of product quality, meanwhile, α -linolenic acid content is higher, the product prepared by the invention is different from a common MLCT product and contains higher α -linolenic acid, the MLCT content of the product reaches 40-75%, and the α -linolenic acid content reaches more than 20%, so that the product is more beneficial to health.
The invention obtains the product with lower peroxide value by optimizing the drying process and preferably selecting the vacuum drying process, has simple preparation, less catalyst consumption, mature process, low temperature and short time, and is beneficial to protecting α -linolenic acid.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for preparing triglyceride rich in α -linolenic acid with medium-long carbon chain structure is characterized by comprising the following steps,
uniformly mixing medium-carbon chain triglyceride and refined linseed oil, and removing redundant water in the raw material by vacuum drying to obtain a medium-carbon chain triglyceride refined linseed oil mixture;
adding sodium methoxide into the medium-chain triglyceride refined linseed oil mixture, reacting for a certain time under the condition of stirring, stopping heating and stirring, adding hot water to stop the reaction, washing with water to be neutral, and performing vacuum drying to obtain a high-quality medium-chain triglyceride product rich in α -linolenic acid.
2. The method for preparing high-quality triglyceride with medium-long carbon chain structure rich in α -linolenic acid as claimed in claim 1, wherein the refined linseed oil meets the quality standard of the primary refined linseed oil in the linseed oils GB/T8235-2019, and the content of α -linolenic acid is more than 45%.
3. The method for producing high-quality triglyceride with a medium-and-long-carbon-chain structure and rich in α -linolenic acid according to claim 1, wherein the medium-carbon-chain triglyceride is refined medium-carbon-chain triglyceride, wherein the content of medium-carbon-chain fatty acids rich in caprylic acid, capric acid and lauric acid is more than 90%, the acid value is not more than 0.1mgKOH/g, and the peroxide value is not more than 1 mmol/kg.
4. The method for preparing high-quality triglyceride with medium and long carbon chain structure rich in α -linolenic acid according to claim 1, wherein the medium chain triglyceride is uniformly mixed with the refined linseed oil, wherein the addition amount of the linseed oil accounts for 40-70% of the total mass percentage of the medium chain triglyceride and the refined linseed oil.
5. The method for preparing high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid according to claim 1, wherein the excess water in the raw material is removed by vacuum drying, wherein the vacuum drying temperature is 75-95 ℃ and the vacuum drying time is 25-60 min.
6. The method for producing high-quality triglyceride with medium-and-long carbon chain structure rich in α -linolenic acid according to claim 1, wherein sodium methoxide is added into the refined linseed oil mixture containing medium-chain triglyceride, wherein the addition amount of sodium methoxide is 0.2-0.4%.
7. The method for preparing high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid according to claim 1, wherein the heating and stirring are stopped after the reaction is carried out for a certain time, wherein the reaction temperature is 40-70 ℃, and the reaction time is 15-60 min.
8. The method for producing high-quality triglyceride with a medium-long carbon chain structure, which is rich in α -linolenic acid, according to claim 1, wherein the stirring speed is 200 to 800 r/min.
9. The method for producing high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid according to claim 1, wherein the high-quality triglyceride with medium-long carbon chain structure and rich in α -linolenic acid is obtained by vacuum drying, wherein the drying temperature is 60-90 ℃ and the vacuum degree is 0.05-0.1 MPa.
10. The product prepared by the method for preparing high-quality triglyceride with medium-long carbon chain structure rich in α -linolenic acid according to any claim 1 to 9, wherein the MLCT content in the product is 40-75%, and the α -linolenic acid content in the product is 20-40%.
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| CN103380827A (en) * | 2012-05-02 | 2013-11-06 | 丰益(上海)生物技术研发中心有限公司 | Grease composition for preventing obesity fatty liver and preparation method thereof |
| CN103891920A (en) * | 2012-12-25 | 2014-07-02 | 中粮营养健康研究院有限公司 | Grease composition containing medium and long carbon chain triglycerides, and preparation method thereof |
| CN105821089A (en) * | 2016-06-12 | 2016-08-03 | 江南大学 | Method for enzymatically synthesizing medium-long chain structure triglyceride |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156273A1 (en) * | 2021-01-22 | 2022-07-28 | 南昌大学 | Functional edible oil, preparation method therefor and use thereof |
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