CN114634840A - High-value pure natural preparation process of linseed oil - Google Patents
High-value pure natural preparation process of linseed oil Download PDFInfo
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- CN114634840A CN114634840A CN202111444689.3A CN202111444689A CN114634840A CN 114634840 A CN114634840 A CN 114634840A CN 202111444689 A CN202111444689 A CN 202111444689A CN 114634840 A CN114634840 A CN 114634840A
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- 235000021388 linseed oil Nutrition 0.000 title claims abstract description 101
- 239000000944 linseed oil Substances 0.000 title claims abstract description 101
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
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- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
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- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
-
- 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
- C11B3/16—Refining fats or fatty oils by mechanical means
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention relates to a high-valued pure natural preparation process of linseed oil, which comprises a main process and an auxiliary process, wherein the main process comprises the following steps: raw material cleaning → crushing → tempering → low temperature pressing → filtering → degumming → dewaxing → linseed oil, and the auxiliary flow comprises the following steps: baking and frying → cooling → crushing, wherein after the raw materials are cleaned, the raw materials are divided according to the weight ratio, 10% -20% of the raw materials enter the baking and frying process of the auxiliary process, and the rest raw materials enter the crushing process of the main process; and after the crushing process of the auxiliary process, mixing the crushed materials with the materials after the tempering process of the main process, and then performing primary pressing in a low-temperature pressing process. Under the combination of the main flow and the auxiliary flow, the invention not only maintains the nutrient components, avoids the contact pollution and the harmful substances generated at high temperature, has no solvent residue and harmful substances, but also maintains the faint scent of the characteristics of the linseed oil, so that the linseed oil not only accords with the characteristics of green, environment-friendly and original natural oil, but also is beneficial to the application in the aspects of catering, food and the like.
Description
Technical Field
The invention belongs to the technical field of oil preparation, and particularly relates to a high-valued pure natural preparation process of linseed oil.
Background
Flax is an annual or perennial herbaceous plant of the linaceae family, is one of five oil crops in China, is mainly distributed in northern China, northwest China and other places, and has the second place in the world for planting area and yield. The flax seeds are commonly called flax and are about 30 ten thousand tons of flax seeds in China, moreover, the whole flax seeds contain 30 to 45 percent of oil and 10 to 30 percent of protein, and also contain amino acid necessary for human bodies, abundant edible fibers, mineral substances, various vitamins (A, B families, D, E and the like), phenolic acids, flavone, phytic acid, lecithin and other active nutritional ingredients, thereby having good edible and medicinal values.
The linseed planted in China is mainly used for preparing grease, and is called linseed oil, linseed oil or linseed oil and the like. With the continuous and deep scientific research on the linseed oil in recent years, the nutrition and health care function of the linseed oil gradually draws attention of people, and the research field mainly relates to the food industry, livestock and poultry feed, medical health care products, cosmetics and the like. The linseed oil is rich in unsaturated fatty acid, contains 39-62% of linolenic acid, 13-39% of oleic acid and 12-30% of linoleic acid, has good nutrition and health care effects, and is a very valuable oil. Alpha-linolenic acid rich in linseed oil is a fatty acid essential to human body, and can be converted into eicosapentaenoic acid and docosahexaenoic acid in human body, which is an effective active ingredient in fish oil. The alpha-linolenic acid is the main component with health care physiological function in the linseed oil, belongs to essential fatty acid of a human body, has multiple functions of reducing blood fat, reducing cholesterol, preventing cancer, improving eyesight and the like, and has good application prospect in the fields of medicines, health care products and the like. The linseed oil also contains a strong and effective free radical scavenger VE, and has the effects of delaying aging and resisting oxidation. The non-saponified matter of linseed oil is 8.26%, which indicates that considerable amounts of higher fatty alcohol, sterol and hydroxyl, etc. are also present in linseed oil. The application of linseed oil in the food field mainly comprises the following steps: nutritional edible oil, fortified food and health food.
At present, linseed oil as a kind of functional oil products is commonly used in developed countries such as the united states and canada, and the commercially available linseed oil products in China are as follows: low-temperature cold-pressed linseed oil, pregnant woman-specific linseed oil, strong-fragrance linseed oil and the like. In addition, the refined linseed oil can be mixed with vegetable oil such as soybean oil, rice bran oil and the like according to the proper proportion of fatty acid required by a human body to prepare nutritional edible blend oil.
Like other kinds of oil, the health care function of the linseed oil mainly depends on the specific fatty acid composition, and the linseed oil preparation process from the linseed oil can affect the components such as the fatty acid contained in the linseed oil, so that the nutritional value of the linseed oil is influenced to a certain extent, and the requirements on the linseed oil preparation process are mainly to improve the oil quality and reduce the damage to functional components such as alpha-linolenic acid.
Meanwhile, the preparation method of the linseed oil mainly comprises the following steps: squeezing, solvent leaching, supercritical CO2 extraction, biological enzyme method, etc.
And (3) squeezing: at present, the linseed oil is prepared by a squeezing method which directly separates grease from linseed by physical and mechanical pressure, and no chemical substance is added in the whole process, so that the method is an environment-friendly and healthy grease preparation method. The squeezing method is divided into two methods: firstly, the hot pressing method is to steam and fry the flaxseeds at 120 ℃ to form clinker, and the clinker is input into an oil press to be pressed and extracted when the pressing condition is reached, so that the obtained flaxseed oil has thick roasted fragrance. The other method is a cold pressing method, wherein the flaxseeds are directly put into an oil press to be pressed and extracted without being subjected to heat treatment of steaming and frying, and the prepared flaxseed oil has light fragrance. The cold pressing method is directly prepared under basic natural conditions, the main nutrient components of the linseed oil are slightly influenced in the whole pressing process, the fatty acid oxidation degree of the linseed oil is also lower, the adverse effect generated in the traditional high-temperature pressing process is avoided because high temperature is not passed, the natural flavor and color of the linseed oil are retained in the linseed oil, the bioactive substances such as alpha-linolenic acid, vitamin E, sterol, carotenoid and the like in the linseed oil are completely preserved, and the linseed oil has high nutrition and health care functions. Compared with the cold pressing method, the hot pressing method has relatively high oil yield and low production cost.
A solvent leaching method: the method comprises the steps of extracting grease from flaxseeds by using vegetable oil extraction solvent oil as an extracting agent, separating oil from the solvent to obtain crude flaxseed oil, and carrying out degumming, deacidification, decoloration, deodorization, dewaxing and other processing on the crude flaxseed oil to obtain the finished flaxseed oil meeting the national standard. The solvent leaching method can extract the grease of the flaxseeds to the maximum extent and can also effectively remove harmful substances such as cyanogenic glycosides.
Supercritical CO2 extraction: the method for preparing the oil is a new technology, has more scientific researches in recent years, and has the advantages of fast mass transfer, high extraction rate, safety, no toxicity, no pollution, mild extraction conditions and capability of avoiding oxidative deterioration reaction of products. Compared with the traditional separation method, the supercritical CO2 extraction method not only simplifies the operation process, but also has relatively low energy consumption.
The biological enzyme method comprises the following steps: the biological enzyme method is an efficient method for preparing linseed oil, namely, biological enzymes such as cellulase, hemicellulase, pectinase, protease and the like are adopted to degrade cell tissues such as lipoprotein, polysaccharide and the like in linseed seeds, so that effective ingredients in a cell structure are liberated, and the oil yield of the linseed oil is improved. Besides high phosphorus content, other indexes of the linseed crude oil extracted by the process are obviously superior to those of the traditional method, and the extraction condition is mild and the production is safe.
The above detailed description of the linseed oil preparation method shows that:
a squeezing method: the cold pressing method has the advantages of relatively low oil yield and high production cost, and the cold pressed linseed oil has over-light flavor and lacks attractive fragrance, so that the linseed oil has limitation in catering, and the cold pressed linseed oil has a great defect as edible oil. During the hot pressing method, the oil needs to be steamed and fried at high temperature, so that the alpha-linolenic acid in the linseed oil is easily oxidized and deteriorated, in addition, the color and luster of the oil can also become dark, and the active substances in the linseed oil are seriously damaged, thereby causing resource waste.
A solvent leaching method: because chemical solvents are added into the flaxseeds, the prepared flaxseed oil can be eaten only after strict separation and refining, the nutritional value and the physiological activity function of the flaxseeds are seriously damaged and basically have little difference with common vegetable oil, and the oil produced by the method conflicts with the current nutritional, healthy and natural consumption concept due to the solvent residue.
Supercritical CO2 extraction: however, the whole operation process needs to be carried out under high pressure, so the requirements on instruments and process conditions are relatively high, and the early investment is large.
The biological enzyme method comprises the following steps: how to reduce the production cost and realize the recovery and the recycling of the enzyme is a difficult problem which limits the industrial application of the biological enzyme method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an improved high-value pure natural preparation process for preparing linseed oil by cold pressing oil by using linseed as a raw material. The linseed oil not only furthest reserves nutrient components, avoids contact pollution, avoids harmful substances generated at high temperature, has no solvent residue, has no benzo (a) pyrene, has no trans-fatty acid harmful to human bodies, has pure natural characteristics, but also reserves the faint scent of the characteristic, has attractive unique fragrance, accords with the characteristics of green, environment-friendly and original natural pure natural oil, is more favorable for application in catering, food and the like, has good reprocessing performance and has wide application prospect.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high-value pure natural preparation process of linseed oil comprises a main process, wherein the main process comprises the following steps: raw material cleaning → crushing → conditioning → low temperature pressing → filtering → degumming → dewaxing → linseed oil, in particular, the process further comprises an auxiliary flow, wherein the auxiliary flow comprises the following steps: baking and frying → cooling → crushing, wherein after the raw materials are cleaned, the raw materials are divided according to the weight ratio, 10% -20% of the raw materials enter the baking and frying process of the auxiliary process, and the rest raw materials enter the crushing process of the main process; after the crushing process of the auxiliary process, the materials are mixed with the materials after the tempering process of the main process, and then the mixture enters a low-temperature squeezing process to be squeezed for the first time.
Preferably, the barrel temperature of the oil press selected in the low-temperature pressing process is lower than 80 ℃, and further, the barrel temperature of the oil press selected in the low-temperature pressing process is lower than 60 ℃. Pressing at the temperature can not damage active substances in the linseed oil, can not cause oxidative deterioration of alpha-linolenic acid in the linseed oil, and can not cause darkening of the color of the grease.
According to a specific implementation and a preferable aspect of the invention, the baking and frying process of the auxiliary flow is hot air baking and frying, wherein the temperature of the hot air is controlled to be 130-150 ℃, and the flax seeds should not be burnt and burnt after being fried and have strong fragrance. Only in this way is the characteristic scent ensured (i.e. the scent is increased).
In accordance with yet another embodiment and preferred aspect of the present invention, the cooling step of the secondary flow is performed by cooling the cooked flaxseed with air in a roller cooler, and cooling the flaxseed to a temperature of less than 60 ℃. The mode of rapid cooling is adopted, and the main purposes are as follows: prevent the materials from being carbonized due to heat accumulation, and further cause the grease to contain benzo (a) pyrene and trans fatty acid harmful to human bodies.
According to still another embodiment and preferred aspect of the present invention, the raw material cleaning process comprises a previous screening and a classification screening, wherein the previous screening removes impurities carried in the raw material, and the impurity content is reduced to below 0.1%; and the classified screening is to select the flaxseeds with full grains and mature color as raw materials. Therefore, the requirements of cold pressing of the flaxseeds on raw materials are high, the subsequent processing of the flaxseed oil prepared by cold pressing is simple, and various bioactive substances in the flaxseed oil can be retained to the maximum extent, which is the key for ensuring that the flaxseed oil has excellent nutrition and health care functions. Therefore, the quality of the raw material should be ensured to be good, the flaxseeds with poor quality should be separated in the previous procedures of cleaning, grading and the like, and the flaxseeds with proper maturity, full grains and good quality are selected as the raw materials of the cold pressed oil. The impurities in the raw materials are removed by cleaning, and the impurity content is reduced to below 0.1%.
In addition, in the tempering process of the main process, the moisture of the flaxseed material is regulated, and the moisture content is controlled to be 7-8%. The water content of the flaxseed material is adjusted, the pressing temperature is increased as much as possible on the premise of meeting the technological requirements of cold pressing so as to facilitate oil production, the flaxseed material is adjusted to the proper pressing water content of about 7-8% according to the characteristics of flaxseeds and the characteristics of an oil press, and the extraction of the flaxseed oil is not facilitated due to overhigh or overlow water content.
Preferably, the filtering process of the main process comprises preliminary deslagging and filtering of the pressed crude oil.
Preferably, in the degumming procedure of the main flow, the peptizing impurities in the grease are removed by hydration degumming, and the vacuum dehydration is carried out after the hydration degumming.
Preferably, in the dewaxing process of the main process, the wax with high melting point in the oil is separated from the oil by cooling, crystallization and crystal growth, and then the wax is removed by filtration or centrifugal separation, so as to obtain the finished linseed oil.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
under the combination of the main process and the auxiliary process, the invention not only furthest retains the nutrient components, avoids contact pollution, avoids harmful substances generated at high temperature, has no solvent residue, has no benzo (a) pyrene, has no trans-fatty acid harmful to human bodies, has pure natural characteristics, but also retains the faint scent of the characteristic of the oil, ensures that the oil has attractive and unique fragrance, ensures that the linseed oil conforms to the characteristics of green, environment-friendly and original ecological pure natural oil, is more favorable for application in catering, food and the like, ensures that the linseed oil has good reprocessing performance and has wide application prospect.
Detailed Description
The present invention will be described in detail with reference to the embodiments, so that the above objects, features, and advantages of the present invention can be understood more clearly. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
Example 1
The high-valued pure natural linseed oil preparation process related by the embodiment comprises a main process and an auxiliary process.
Specifically, the main process includes: cleaning raw materials → crushing → tempering → low-temperature pressing → filtering → degumming → dewaxing → linseed oil.
The auxiliary process comprises the following steps: parching → cooling → crushing.
In this example, the relationship between the main flow and the auxiliary flow is that the auxiliary flow is located on a branch of the main flow.
Specifically, the flaxseeds after the raw materials are cleaned are divided into two paths, one path of the flaxseeds goes to the crushing process of the main process, and the other path of the flaxseeds goes to the baking and frying process of the auxiliary process.
Meanwhile, the flaxseeds are fully mixed after being subjected to the crushing process of the auxiliary process and the conditioning process of the main process respectively, and then are squeezed once.
In the main flow, the raw material cleaning process comprises the steps of primary screening and classified screening, wherein the primary screening removes impurities carried in the raw materials, and the impurity content is reduced to be below 0.1%; and the classified screening is to select the flaxseeds with full grains and mature color as raw materials. Therefore, the cold pressing of the flaxseeds has higher requirements on raw materials, the subsequent processing of the flaxseed oil prepared by cold pressing is simpler, and various bioactive substances in the flaxseed oil can be retained to the greatest extent, which is the key for ensuring that the flaxseed oil has excellent nutrition and health care functions. Therefore, the quality of the raw material should be ensured to be good, the flaxseeds with poor quality should be separated in the previous procedures of cleaning, grading and the like, and the flaxseeds with proper maturity, full grains and good quality are selected as the raw materials of the cold pressed oil. The impurities in the raw materials are removed by cleaning, and the impurity content is reduced to below 0.1%.
In the main process, flaxseed is crushed, refined and homogenized, but the powder size cannot be too large.
In the main flow, the moisture of the flaxseed material is regulated, and the water content is controlled to be 7-8%. The water content of the linseed material is adjusted, the pressing temperature is increased as much as possible on the premise of meeting the technological requirements of cold pressing so as to be beneficial to oil production, the linseed material is adjusted to the proper pressing water content of about 7% -8% according to the characteristics of flaxseeds and the characteristics of an oil press, and the extraction of the flaxseed oil is not facilitated due to the overhigh and overlow water content.
In the main flow, the barrel temperature of the oil press selected in the low-temperature pressing process is 55 +/-2 ℃. Pressing at the temperature can not damage active substances in the linseed oil, can not cause oxidative deterioration of alpha-linolenic acid in the linseed oil, and can not cause darkening of the color of the grease.
In the main process, the filtering process comprises preliminary deslagging and filtering of the squeezed crude oil.
In the main flow, in the degumming procedure, hydration degumming is adopted to remove peptized impurities in the grease, and vacuum dehydration is carried out after the hydration degumming.
In the main flow, in the dewaxing process, wax with a high melting point in the oil is separated out from the oil through cooling, crystallization and crystal growth, and the wax is removed through filtration or centrifugal separation, so that a finished linseed oil product is obtained.
In the auxiliary process, the flaxseed is divided according to the weight ratio, 10% of flaxseed enters the baking and frying process of the auxiliary process, and 90% of flaxseed enters the crushing process of the main process.
In the auxiliary flow, the baking and frying process is hot air baking and frying, wherein the temperature of hot air is controlled to be 130-150 ℃, and the fried flax seeds are not burnt and have thick fragrance. Only in this way, a characteristic fragrance can be ensured.
In the auxiliary process, the cooling process mainly comprises parchingHemp seedVentilating and cooling the seeds by a roller cooler, wherein the temperature of the cooled flaxseeds is below 60 ℃. The mode of rapid cooling is adopted, and the main purposes are as follows: so as to prevent the materials from being carbonized due to heat accumulation, and further cause the oil to contain benzo (a) pyrene and trans-fatty acid harmful to human bodies.
In the auxiliary process, flaxseeds are crushed to facilitate oil pressing.
In conclusion, the linseed oil is prepared according to the main process and the auxiliary process, has special thick fragrance, meets the characteristics of green, environment-friendly and original-ecology pure natural oil, is more favorable for application in catering, food and the like, and has good reprocessing performance and wide application prospect.
Comparative example 1
The high-valued pure natural linseed oil preparation process related to the comparative example adopts the same process as the main process in example 1 to obtain linseed oil.
Meanwhile, the following quality index detection is carried out on the obtained linseed oil, specifically referring to the national standard GB/T8235-2019 Linseed oil, but the solvent residue and the trans-fatty acid are used for avoiding the cold-pressed Linseed oil from being mixed or mixed with the refined Linseed oil, so the quality index detection is carried out by referring to the group standard T/CCOA27-2020 Cold-pressed Linseed oil published by the Chinese food and oil institute in the embodiment, and the result is shown in Table 1.
TABLE 1
Example 2
The high-valued pure natural linseed oil preparation process comprises a main process and an auxiliary process, wherein the main process and the auxiliary process are respectively the same as those of the embodiment 1. The difference is that in this example, 15% of the flaxseeds by weight are processed in the secondary process and 85% of the flaxseeds are processed in the primary process.
Comparative example 2
The difference lies in that in the comparative example, 8% of the flaxseeds by weight enter the baking and frying process of the auxiliary process, and 92% of the flaxseeds enter the crushing process of the main process.
In summary, it is evident that the linseed oil obtained in example 2 is more fragrant in taste compared to comparative example 2. Meanwhile, the quality index detection is carried out by referring to the group standard T/CCOA27-2020 cold-pressed linseed oil published by the Chinese food and oil society, and the result is shown in Table 2.
TABLE 2
Example 3
The high-valued pure natural linseed oil preparation process comprises a main process and an auxiliary process, wherein the main process and the auxiliary process are respectively the same as those of the embodiment 1. The difference is that in this example, 20% of the flaxseeds by weight are processed in the secondary process of parching, and 80% of the flaxseeds are processed in the primary process of crushing.
Comparative example 3
The difference is that in the comparative example, 30% of the flaxseeds by weight enter the baking and frying process of the auxiliary process, and 70% of the flaxseeds enter the crushing process of the main process.
In summary, in example 3, compared with comparative example 3, it is obvious that the linseed oil obtained in comparative example 3 has more fragrant taste, and the quality index test is performed by referring to the group standard T/CCOA27-2020 Cold pressed linseed oil published by the Chinese food and oil society, and the results are shown in Table 3.
TABLE 3
The present invention is described in detail in order to make those skilled in the art understand the content and practice the invention, and the invention is not limited to the above embodiments, and all equivalent changes or modifications made according to the spirit of the invention should be covered by the scope of the invention.
Claims (10)
1. A high-value pure natural preparation process of linseed oil comprises a main process, wherein the main process comprises the following steps: cleaning raw materials → crushing → tempering → low temperature pressing → filtering → degumming → dewaxing → linseed oil, which is characterized in that: the process also comprises an auxiliary flow, wherein the auxiliary flow comprises the following steps: baking and frying → cooling → crushing, wherein after the raw materials are cleaned, the raw materials are divided according to the weight ratio, 10% -20% of the raw materials enter the baking and frying process of the auxiliary flow, and the rest raw materials enter the crushing process of the main flow; and after the crushing process of the auxiliary process, mixing the crushed materials with the materials after the tempering process of the main process, and then performing primary pressing in the low-temperature pressing process.
2. The high-valued pure natural linseed oil according to claim 1, wherein: the barrel temperature of the oil press selected in the low-temperature pressing procedure is lower than 80 ℃.
3. The high-valued pure natural linseed oil according to claim 2, wherein: the barrel temperature of the oil press selected in the low-temperature pressing procedure is lower than 60 ℃.
4. The high-valued pure natural linseed oil according to claim 1, wherein: the baking and frying procedure of the auxiliary flow is hot air baking and frying, wherein the temperature of hot air is controlled to be 130-150 ℃, and the flax seeds are not burnt and burnt after being fried and are fragrant.
5. The high-valued pure natural linseed oil according to claim 1, wherein: in the cooling process of the auxiliary flow, the parched flaxseeds are ventilated and cooled by a roller cooler, and the temperature of the cooled flaxseeds is below 60 ℃.
6. The high-valued pure natural flaxseed oil production process according to claim 1, wherein: the raw material cleaning process comprises the steps of previous screening and classification screening, wherein the previous screening removes impurities carried in the raw materials, and the impurity content is reduced to be below 0.1%; and the classified screening is to select the flaxseeds with full grains and mature color as raw materials.
7. The high-valued pure natural linseed oil according to claim 1, wherein: in the conditioning process of the main process, the moisture of the flaxseed material is regulated, and the water content is controlled to be 7-8%.
8. The high-valued pure natural flaxseed oil production process according to claim 1, wherein: the filtering process of the main process comprises the steps of preliminary deslagging and filtering of the squeezed crude oil.
9. The high-valued pure natural linseed oil according to claim 1, wherein: in the degumming procedure of the main flow, the peptizing impurities in the grease are removed by hydration degumming, and the vacuum dehydration is carried out after the hydration degumming.
10. The high-valued pure natural linseed oil according to claim 1, wherein: in the dewaxing procedure of the main flow, wax with a high melting point in the oil is separated out from the oil through cooling, crystallization and crystal growth, and the wax is removed through filtration or centrifugal separation, so that a finished product of the linseed oil is obtained.
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