CN116020163A - Green method for efficiently removing mucilaginous substances on surface of high-gel-content plant material by using superheated water - Google Patents
Green method for efficiently removing mucilaginous substances on surface of high-gel-content plant material by using superheated water Download PDFInfo
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Abstract
The invention belongs to the field of extraction and separation of natural active products, and discloses a green method for efficiently removing mucilaginous substances on the surface of a plant material with high gum content by using superheated water. The invention utilizes superheated water to extract mucilage in the plant material with high gum content, and utilizes pressure difference to collect mucilage, and the gum removal rate can reach 97.1%. The invention uses the water in the overheat state as the solvent, does not generate acid wastewater which pollutes the environment, and is environment-friendly; the pressure difference is collected, so that the viscous polysaccharide extract is separated from the solid materials with high efficiency, and the effect is remarkable.
Description
Technical Field
The invention belongs to the field of extraction and separation of natural active products, and particularly relates to a green method for efficiently removing mucilaginous substances on the surface of a plant material with high gum content by using superheated water.
Background
The flaxseeds are important oil crops in China, contain rich nutrient substances such as linolenic acid, vitamin E, flaxseed protein and the like, and also contain natural active ingredients such as flax lignans, flax gum (polysaccharide) and the like, wherein the flax lignans are in flaxseed shells, and the flax gum (polysaccharide) is on the flaxseed shells. The flax seed consists of seed coat, endosperm and embryo, wherein the seed coat accounts for about 30-39% of the total seed weight, a thicker Mucilage layer is contained on the surface of the seed coat, the main component is the Mucilage (Mucilage) on the surface of the flax seed, which is mainly an acidic or neutral polysaccharide formed by polymerizing 6 monosaccharides of xylose, galactose, arabinose, glucose, rhamnose and fucose, and belongs to anionic polysaccharide, wherein a small part of protein is connected with the polysaccharide and exists in the form of binding protein. The flaxseed surface mucilage belongs to secondary wall cell polysaccharide, and because the flaxseed mucilage has sticky property, if the process step of removing the colloid is not carried out in the production process of the flaxseed food, the flaxseed surface mucilage can be adhered to the parts of the upper jaw, the lower jaw, the teeth, the gums and the like of the oral cavity when eating, so that when eating the non-degummed flaxseed product, the strong discomfort is brought to consumers, and further the deep processing and the commercial popularization of the non-degummed flaxseed product are influenced. In addition, in the processing process of flax seed products such as stir-frying, baking and the like at higher temperature, the flax seed mucilage can be converted from a solid state attached to the surface to a viscous liquid state, so that the mucilage between the seeds is mutually adhered, and finally, a plurality of flax seeds are gathered to form caking at higher temperature due to dehydration or carbonization, and the caking can be adhered to the surface of a container, so that the flax seed mucilage is hard after cooling, is difficult to clean, is not beneficial to continuous production, and is difficult to accurately control the processing technology. Because the thick mucilage surface layer of the flaxseeds influences the heat conduction efficiency in the processing process to a certain extent, the interior of the oil crop flaxseeds with high oil content can not reach the expected processing temperature, so that the flaxseeds contain components with certain fishy smell, aromatic components can not be generated through Maillard reaction to reduce peculiar smell, and the quality of flaxseeds is further influenced. In conclusion, the removal of mucilages on the surface layer of high-gum-content oil materials such as flaxseeds is of great importance for further processing.
Because the traditional method has complex degumming process and high cost, the shell raw material containing mucilaginous substances is often used as waste for feed, or is burnt and buried, so that certain environmental pollution is caused, and meanwhile, active substances such as lignans, dietary fibers and the like in the flaxseed shells cannot be fully developed and utilized, and the added value cannot be embodied. The polysaccharide in the flaxseed mucilage is also one of the main components in the processing of flaxseed series functional products, and the content of the polysaccharide can reach more than 16%. Flax gum (polysaccharide) (also known as Fulanke gum) is widely used as a novel food additive in the food, pharmaceutical and daily chemical industries, has the functions of thickening, stabilizing emulsification and the like, and has the functional characteristics similar to that of Arabic gum. Therefore, the efficient separation process of mucilages in the processing of the oil materials such as the flaxseeds not only can improve the taste and the nutritive value of the flaxseeds and ensure the quality control in the industrial continuous production process, but also is very necessary and important for the value-added processing and comprehensive utilization of the flaxseeds and the like, and the maximum utilization of resources is realized.
The currently reported separation methods of the flaxseed gum (polysaccharide) mainly comprise mechanical polishing and degumming, hot water stirring and leaching and the like. The mechanical polishing and degumming method is to obtain flaxseed rubber powder by friction force of a sand roller, and then separate the powder according to density by an air screen. The normal pressure hot water soaking extraction method is the most mainstream extraction method for obtaining flaxseed polysaccharide at present, a great amount of water and time are needed for leaching by using hot water, and a screen mesh is needed to separate glue-containing liquid from base materials under natural gravity; or transferring the mixed solution to a centrifuge, and separating the flaxseed polysaccharide extract from the raw materials under the action of centrifugal force. Chinese patent publication CN1072184a uses an acid water bath to leach for 2.5 hours to remove the gum from the seed of the flax, which takes a long time, and the waste water contains sulfuric acid, which is discharged directly without treatment, thus polluting the environment, and the acidic waste water is not favorable for industrial mechanized production. In Chinese patent application publication No. CN202010762254.2, there is reported an extraction method of polysaccharide from oil-tea camellia meal, wherein the separation method comprises the steps of taking out an extracted pressure-resistant reaction bottle, cooling to room temperature, opening a bottle body, transferring a bottom material and an extract liquid to a centrifugal device, centrifuging to obtain a supernatant containing polysaccharide, and combining the supernatant with secondary colloid removal. Therefore, the oil with higher glue content can cause incomplete glue removal, more complex procedures and the like, and finally causes the situation of low glue removal rate.
So far, because the flaxseed mucilage (polysaccharide) is sticky and hard after being cooled, and is re-adhered to the extraction tank container and the surface of the raw material, the glue removing time is too long, and the large-scale rapid continuous production cannot be realized, and no good solution exists.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the primary purpose of the invention is to provide a green method for efficiently removing mucilaginous substances on the surface of high-gel-content plant materials by using superheated water.
The aim of the invention is achieved by the following scheme:
a green method for efficiently removing mucilaginous substances on the surface of a high-gel-content plant material by using superheated water comprises the following steps:
1) A filter cartridge is arranged in the superheated water reaction tank, the plant material with high gum content is added into the filter cartridge, the extraction solvent water is added into the superheated water reaction tank, and then the extraction solvent is heated under the sealing condition to form a superheated state, so that the plant material with high gum content is extracted;
2) The bottom of the superheated water reaction tank is provided with a liquid outlet, and the liquid outlet is connected with the extraction liquid collection tank through a pipeline; and after extraction is finished, vacuumizing the extraction liquid collection tank, opening a liquid outlet at the bottom of the superheated water reaction tank, and transferring the mucilage extraction liquid of the plant material with high colloid content into the extraction liquid collection tank by utilizing pressure difference when the plant material with high colloid content is hot, so as to obtain the crude mucilage extraction liquid of the plant material with high colloid content.
Preferably, the green method for efficiently removing mucilaginous substances on the surface of the high-gel-content plant material by using the superheated water specifically comprises the following steps:
a) Feeding: opening the superheated water state maintaining device 1, adding high-gel plant materials into the filter cylinder 2 of the built-in superheated water reaction tank 3, opening the water inlet switch SL1, closing the water inlet switch SL1 after extracting solvent water is added, and closing the superheated water state maintaining device 1;
b) Opening a control panel of the equipment, setting extraction temperature, extraction pressure, extraction time and stirring rate;
c) Mucilage extraction: closing the air pressure valve SP1, opening a switch of the stirring paddle 7, heating extraction solvent water by using the heating jacket 4, boosting by using the superheated water state maintaining device 1 until a superheated state is formed, extracting the plant material with high gum content, and closing heating and stirring after extraction is finished;
d) Mucilage separation: opening an air pressure valve SP2, evacuating air in the extraction liquid collection tank 6 by using a vacuum pump device 5, closing the air pressure valve SP2, opening a valve switch SL2 for connecting the overheated water reaction tank and the collection tank, and transferring the high-gel-content plant material mucilage extraction liquid into the extraction liquid collection tank 6 to obtain a high-gel-content plant material mucilage crude extract;
the high-gum-content plant material in the step 1) refers to a high-gum-content plant material with the gum content of more than 15 percent.
The plant material with high gum content in the step 1) comprises at least one of flaxseed, flaxseed shell and flaxseed meal cake.
The feed liquid ratio of the plant material with high gum content to water is 1:30-1:8 (g/mL), preferably 1:20-1:8 (g/mL).
The extraction temperature in step 1) and step b) is 105-175 ℃; the extraction pressure is 0.12-1.12MPa; the extraction time is 5-30min; the stirring rate was 20-120rpm.
The superheated state in step 1) and step c) is a state in which the temperature is higher than the boiling point of the solvent at normal pressure but the solvent is still liquid.
The extraction in step 1) and step c) is extraction under a closed environment.
And 2) forming strong pressure difference between the overheated water reaction tank and the extraction liquid collecting tank of the overheated reaction tank in the step 2) and the step d) to separate liquid from the liquid, wherein the pressure of the extraction liquid collecting tank is controlled to be-0.1-0 MPa, and the pressure of the overheated water reaction tank is controlled to be 0.1-1.5MPa. Under the pressure higher than two normal atmospheric pressures and the filtering action of the filter cylinder 2, the method can effectively separate the mucilage extract on the surface of the plant material with high mucilage content from the plant material with high mucilage content of the solid base material in a viscous state in a very short time.
The heating medium in the heating jacket in step c) is a high boiling point oil.
The method is applied to the integral removal of mucilaginous matters on the surface layer of the high-gum-content crops, and is convenient for further high-valued processing of the high-gum-content crops after degumming, such as the utilization of lignans and dietary fibers in flaxseeds. And also facilitates the subsequent full utilization of polysaccharide in mucilaginous materials, such as Chinese patent application publication CN201510391862.6.
Compared with the prior art, the invention has the following advantages:
(1) Compared with the traditional acid water leaching method, the method disclosed by the invention uses water in a superheated state as a solvent to extract the flaxseed mucilage, has the advantages of uniform and stable temperature distribution, high thermal efficiency, small energy consumption, high colloid removal rate and the like, can effectively reduce the production cost, does not generate acid wastewater which pollutes the environment, and is environment-friendly.
(2) Different from the temperature range of subcritical water, the superheated water used in the method can effectively separate mucilaginous substances only at 105-175 ℃ and is far lower than the critical temperature 374 ℃ of water, so that the energy consumption and the safety risk are greatly reduced, the manufacturing difficulty of pressure-related equipment is reduced, and most of oil materials are met.
(3) Different from the traditional decompression filtering separation, the invention changes the over-heating state and the normal temperature and normal pressure state of the water solvent in the extraction reaction tank, the heating or cooling temperature is easy to control, the dissolution efficiency of the water solvent is changed, and meanwhile, a strong pressure difference is formed with the negative pressure state in the collection tank, so that the viscous polysaccharide extract is separated from the solid material efficiently, and the effect is remarkable.
(4) The invention realizes the integrated continuous operation of mucilage extraction and crude extract separation without sectional operation, is suitable for large-scale removal of mucilage with high gum content, has fewer working procedures and is simple and convenient to operate.
(5) The invention lays a foundation for further improving the taste of the flaxseed product, improving the added value of the product, obtaining bioactive substances such as flaxseed mucilage (polysaccharide), lignan and the like, and simultaneously pays attention to energy conservation and emission reduction, has good environmental benefit and is easy for industrialization.
Drawings
FIG. 1 is a schematic diagram of a device for removing flaxseed mucilage from superheated water according to the present invention, wherein 1 represents a superheated water control device, 2 represents a cartridge, 3 represents a superheated water reactor, 4 represents a heating jacket, 5 represents a vacuum pump, 6 represents an extract collection tank, 7 represents a stirring paddle, SL1 represents a liquid level control switch 1, SL2 represents a liquid level control switch 2, SL3 represents a liquid level control switch 3, and SP1 represents a pressure control switch 1, SP2 represents a pressure control switch 2.
FIG. 2 is a standard curve for total sugar content determination.
FIG. 3 is a calibration curve for determining the content of reducing sugar.
FIG. 4 is a graph of the temperature optimization results of superheated water extraction of flaxseed mucilages.
Fig. 5 is a graph of time optimized results of superheated water extraction of flaxseed mucilages.
FIG. 6 is a graph of the results of optimizing the feed to liquid ratio of superheated water extraction of flaxseed mucilage.
FIG. 7 is a graph of the results of optimizing the number of extractions of flaxseed mucilages by superheated water.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The reagents used in the examples are commercially available as usual unless otherwise specified.
Mucilage content is expressed as polysaccharide content, total sugar content was determined using the phenol sulfuric acid method and reducing sugar content was determined using the DNS method:
(1) Determination of total sugar content:
the phenol sulfuric acid method is a standard method for general determination of total sugar, and the polysaccharide is fully hydrolyzed by concentrated sulfuric acid to obtain monosaccharide, and the monosaccharide obtained by hydrolysis, whether free or hydrolyzed, is rapidly dehydrated under heating to form a furfural derivative, and the furfural derivative and phenol form orange yellow color, which is determined by a colorimetric method. Glucose is the most common monosaccharide that is stable at normal temperature, so glucose is generally selected as the standard solution as the standard curve to calculate the total sugar content.
The specific operation is as follows:
glucose was used as a standard control. Accurately weighing 10.0mg of standard glucose in a 100mL volumetric flask, adding distilled water to the lowest concave liquid level of the scale mark, and shaking uniformly to prepare glucose standard mother solution.
And respectively sucking 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4 and 1.6mL, and supplementing water to 2.0mL to obtain a series of glucose standard solutions with different concentrations.
Drawing a standard curve: glucose standard solution is used as standard control, 1.0mL of 6% phenol and 5.0mL of concentrated sulfuric acid are added, standing is carried out for 10min, shaking is carried out, absorbance is measured at 490nm after standing for 20min at room temperature, 2.0mL of water is used as blank control according to the same chromogenic operation, a standard curve is drawn by taking the ordinate as absorbance and the abscissa as glucose content (mug), a standard curve equation is calculated through linear regression, and the variance of the linear regression variance is calculated.
Sample solution analysis: taking 2mL of a sample solution, adding 1.0mL of 6% phenol and 5.0mL of concentrated sulfuric acid, standing for 10min, shaking uniformly, standing at room temperature for 20min, measuring absorbance at 490nm, and calculating the total sugar content in the sample according to a regression equation.
(2) Determination of reducing sugar content:
determining the content of reducing sugar in flaxseed by adopting a 3, 5-dinitrosalicylic acid (DNS) method, accurately weighing 50.0mg of standard glucose in a 100mL volumetric flask, adding distilled water to a volume to a scale, respectively sucking 0.1 mL, 0.2 mL, 0.3 mL, 0.4 mL and 0.5mL of water to 0.5mL, adding 0.5mL of DNS, heating in a boiling water bath for 5min, taking out, cooling to room temperature, adding 4mL of distilled water into each pipe, fully mixing uniformly, determining absorbance at 540nm, taking 0.5mL of distilled water as a blank according to the same chromogenic operation, taking the ordinate as absorbance, taking the abscissa as glucose content (mug), and obtaining a regression curve through linear regression calculation.
Sample solution analysis: taking 0.5mL of extraction supernatant, adding 0.5mL of DNS solution, heating in boiling water bath for 5min, taking out, cooling to room temperature, adding 4mL of distilled water into each tube, fully and uniformly mixing, measuring absorbance at 540nm, and calculating the content of reducing sugar in the sample according to a regression equation.
(3) Mucilaginous matter content= (total sugar mass-reducing sugar mass)/mass of material= (M Total (S) -M And also (3) the method )/M 0
Wherein M is Total (S) M is the total sugar mass in Linum usitatissimum seed And also (3) the method Is the mass of reducing sugar in flaxseed, M 0 Is the quality of flaxseed.
Total mucilage (polysaccharide) content N determination in flaxseed:
distilled water is added into 100g of flaxseed to repeatedly extract under the overheat condition (the extraction condition is that the extraction temperature is 120 ℃, the feed-liquid ratio is 1:10 (g/mL), the extraction time is 10 min) for 4 times, and the polysaccharide quality of each extract is respectively marked as M 1 ,M 2 ,M 3 ，M 4 As can be seen from FIG. 7, the crude polysaccharide content was only able to extract 0.03g/100g when extracted for the fourth time, indicating that all polysaccharides in flaxseeds had been extracted for 4 extractions, i.e. the total mucilage (polysaccharide) content N= (M) in flaxseeds 1 +M 2 +M 3 +M 4 )/M 0 。
Calculated n= (18.22+0.62+0.29+0.03)/100=191.6 mg/g
Adhesive removal rate= (M Total (S) -M And also (3) the method )/M 0 /N×100％。
Example 1
(1) Feeding: opening the superheated water state maintaining device 1, adding 100g of flaxseeds into the filter cartridge 2 built in the reaction tank 3, opening the water inlet switch SL1, adding water 1L, closing the water inlet switch SL1, and closing the superheated water state maintaining device 1;
(2) Opening a control panel of the equipment, setting related parameters, setting the extraction temperature to 120 ℃, the extraction pressure to 0.2MPa, the extraction time to 10min, and the stirring speed to 100rpm;
(3) Closing an air pressure valve SP1 to enable the extraction tank to be in a closed state, opening a switch of a stirring paddle 7, heating water by using a heating jacket 4, and raising the temperature by using a superheated water state keeping device 1 until solvent water forms a superheated water state which is higher than the boiling point of the solvent water and still is liquid, extracting whole seeds of the flaxseeds in a closed environment, closing a heating system after extraction is finished, stopping heating, and closing the stirring paddle;
(4) Separation of mucilaginous substances under strong pressure: opening an air pressure valve SP2, evacuating air in an extraction liquid collection tank 6 by using a vacuum pump device 5 to form a vacuum state lower than normal atmospheric pressure, closing the air pressure valve SP2, opening a valve SL2 which connects the extraction tank and the collection tank, transferring the still high-temperature flaxseed mucilage extract into the extraction liquid collection tank 6 while the flaxseed mucilage extract is hot, and under the pressure higher than two normal atmospheric pressures and the filtering action of a filter cylinder 2, efficiently separating the flaxseed mucilage extract from the solid-state bottom material flaxseed in a very short time by the method, thereby finally obtaining a flaxseed mucilage crude extract;
(5) Opening a liquid outlet valve switch SL3 of the extraction liquid collection tank, discharging the flaxseed mucilage crude extract, and analyzing the mucilage content, wherein the mucilage content is 186.04mg/g, and the colloid removal rate is 97.1%.
Example 2
(1) Feeding: opening the superheated water state maintaining device 1, adding 250g of flaxseeds into the filter cylinder 2 built in the reaction tank 3, opening the water inlet switch SL1, adding water 2L, closing the water inlet switch SL1, and closing the superheated water state maintaining device 1;
(2) Opening a control panel of the equipment, setting related parameters, setting the extraction temperature to 105 ℃, the extraction pressure to 0.12MPa, setting the extraction time to 20min, and stirring at a speed of 80rpm;
(3) Closing an air pressure valve SP1 to enable the extraction tank to be in a closed state, opening a switch of a stirring paddle 7, heating water by using a heating jacket 4, and raising the temperature by using a superheated water state keeping device 1 until solvent water forms a superheated water state which is higher than the boiling point of the solvent water and still is liquid, extracting flaxseeds in a closed environment, closing a heating system after extraction is finished, stopping heating, and closing the stirring paddle;
(4) Separation of mucilaginous substances under strong pressure: opening an air pressure valve SP2, evacuating air in an extraction liquid collection tank 6 by using a vacuum pump device 5 to form a vacuum state lower than normal atmospheric pressure, closing the air pressure valve SP2, opening a valve SL2 which connects the extraction tank and the collection tank, transferring the still high-temperature flaxseed mucilage extract into the extraction liquid collection tank 6 when the flaxseed mucilage extract is hot, and separating the flaxseed mucilage extract from the solid-state bottom material flaxseed in a very short time under the pressure higher than two normal atmospheric pressures and the filtering action of a filter cylinder 2;
(5) Opening a liquid outlet valve switch SL3 of the extraction liquid collection tank, discharging the flaxseed mucilage crude extract, and analyzing the mucilage content, wherein the mucilage content is 172.67mg/g, and the colloid removal rate is 90.12%.
Example 3
(1) Feeding: opening the superheated water state maintaining device 1, adding 150g of flaxseeds into the filter cartridge 2 built in the reaction tank 3, opening the water inlet switch SL1, adding water 3L, closing the water inlet switch SL1, and closing the superheated water state maintaining device 1;
(2) Opening a control panel of the equipment, setting related parameters, setting the extraction temperature to 135 ℃, the extraction pressure to 0.41MPa, setting the extraction time to 5min, and stirring at 60rpm;
(3) Closing an air pressure valve SP1 to enable the extraction tank to be in a closed state, opening a switch of a stirring paddle 7, heating water by using a heating jacket 4, and raising the temperature by using a superheated water state keeping device 1 until solvent water forms a superheated water state which is higher than the boiling point of the solvent water and still is liquid, extracting flaxseeds in a closed environment, closing a heating system after extraction is finished, stopping heating, and closing the stirring paddle;
(4) Separation of mucilaginous substances under strong pressure: opening an air pressure valve SP2, evacuating air in an extraction liquid collection tank 6 by using a vacuum pump device 5 to form a vacuum state lower than normal atmospheric pressure, closing the air pressure valve SP2, opening a valve SL2 which connects the extraction tank and the collection tank, transferring the still high-temperature flaxseed mucilage extract into the extraction liquid collection tank 6 while the flaxseed mucilage extract is hot, and under the pressure higher than two normal atmospheric pressures and the filtering action of a filter cylinder 2, efficiently separating the flaxseed mucilage extract from the solid-state bottom material flaxseed in a very short time by the method, thereby finally obtaining a flaxseed mucilage crude extract;
(5) Opening a liquid outlet valve switch SL3 of the extraction liquid collection tank, discharging the flaxseed mucilage crude extract, and analyzing the mucilage content, wherein the mucilage content is 173.67mg/g, and the colloid removal rate is 93.41%.
The influence of different extraction temperatures on the content of mucilage is explored, the fixed extraction time is 10min, the fixed feed-liquid ratio is 1:20, the temperatures are changed to 105, 110, 120, 130 and 175 ℃ to extract the mucilage in the flaxseed raw material, and the extraction temperature is determined to be 120 ℃ according to the extraction result (figure 4).
The influence of different times on the content of mucilage is explored, the fixed extraction temperature is 120 ℃, and the fixed feed-liquid ratio is 1:10 (g/mL), the extraction time was changed to 5, 10, 20, 30 and 40min, and the mucilage in the flaxseed material was extracted, respectively, and the extraction time was determined to be 10min based on the extraction result (FIG. 5).
The influence of different feed liquid ratios on the content of mucilaginous substances is explored, the fixed extraction temperature is 120 ℃, the extraction time is 10min, and the feed liquid ratio is changed to be 1: 5. 1:10. 1:20, respectively extracting mucilages in the flaxseed raw materials, and determining that the feed liquid ratio is 1 according to the extraction result (figure 6): 10.
according to the single-factor optimal value result, the optimal extraction conditions are as follows: the extraction temperature is 120 ℃, the feed-liquid ratio is 1:10 (g/mL), the extraction time is 10min, and the removal rate of the superheated water-extracted flaxseed gum can reach 97.1%.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The green method for removing mucilaginous substances on the surface of the high-gel-content plant material by using the superheated water is characterized by comprising the following steps of:
1) A filter cartridge is arranged in the superheated water reaction tank, the plant material with high gum content is added into the filter cartridge, the extraction solvent water is added into the superheated water reaction tank, and then the extraction solvent is heated under the sealing condition to form a superheated state, so that the plant material with high gum content is extracted;
2) The bottom of the superheated water reaction tank is provided with a liquid outlet, and the liquid outlet is connected with the extraction liquid collection tank through a pipeline; and after extraction is finished, vacuumizing the extraction liquid collection tank, opening a liquid outlet at the bottom of the superheated water reaction tank, and transferring the mucilage extraction liquid of the plant material with high colloid content into the extraction liquid collection tank by utilizing pressure difference when the plant material with high colloid content is hot, so as to obtain the crude mucilage extraction liquid of the plant material with high colloid content.
2. The green method for removing mucilaginous substances on the surface of high-gel-content plant materials by superheated water according to claim 1, characterized by comprising the following steps:
a) Feeding: opening the superheated water state maintaining device, adding the plant material with high gum content into a filter cylinder of a built-in superheated water reaction tank, opening a water inlet switch, closing the water inlet switch after extracting solvent water is added, and closing the superheated water state maintaining device;
b) Opening a control panel of the equipment, setting extraction temperature, extraction pressure, extraction time and stirring rate;
c) Mucilage extraction: closing the air pressure valve, opening a switch of the stirring paddle, heating the extraction solvent water by using a heating jacket, boosting by using a superheated water state maintaining device until a superheated state is formed, extracting the plant material with high gum content, and closing heating and stirring after the extraction is finished;
d) Mucilage separation: and (3) opening an air pressure valve, evacuating air in the extraction liquid collection tank by using a vacuum pump device, closing the air pressure valve, opening a valve switch for connecting the overheated water reaction tank and the collection tank, and transferring the high-gel-content plant material mucilage extraction liquid into the extraction liquid collection tank 6 to obtain the high-gel-content plant material mucilage crude extraction liquid.
3. The green method for removing mucilaginous substances on the surface of high-gel-content plant materials by using superheated water according to claim 1, which is characterized in that: the high-gum-content plant material in the step 1) refers to a high-gum-content plant material with the gum content of more than 15 percent.
4. The green method for removing mucilaginous substances on the surface of high-gel-content plant materials by using superheated water according to claim 1, which is characterized in that: the plant material with high gum content in the step 1) comprises at least one of flaxseed, flaxseed shell and flaxseed meal cake.
5. The green method for removing mucilaginous substances on the surface of high-gel-content plant materials by using superheated water according to claim 1, which is characterized in that: the feed liquid ratio of the plant material with high gum content to water is 1:30-1:8, and the unit is g/mL.
6. A green method for removing mucilaginous substances from the surface of high-gel-content plant material by superheated water according to claim 1 or 2, characterized in that: the extraction temperature in step 1) and step b) is 105-175 ℃; the extraction time is 5-30min.
7. A green method for removing mucilaginous substances from the surface of high-gel-content plant material by superheated water according to claim 1 or 2, characterized in that: the superheated state in step 1) and step c) is a state in which the temperature is higher than the boiling point of the solvent at normal pressure but the solvent is still liquid.
8. A green method for removing mucilaginous substances from the surface of high-gel-content plant material by superheated water according to claim 1 or 2, characterized in that: the extraction in step 1) and step c) is extraction under a closed environment.
9. A green method for removing mucilaginous substances from the surface of high-gel-content plant material by superheated water according to claim 1 or 2, characterized in that: and 2) forming strong pressure difference between the overheated water reaction tank and the extraction liquid collecting tank of the overheated reaction tank in the step 2) and the step d) to separate liquid from the liquid, wherein the pressure of the extraction liquid collecting tank is controlled to be-0.1-0 MPa, and the pressure of the overheated water reaction tank is controlled to be 0.1-1.5MPa.
10. The green method for removing mucilaginous substances on the surface of high-gel-content plant materials by using superheated water according to claim 2, which is characterized in that: the heating medium in the heating jacket in step c) is a high boiling point oil.
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| CN117225004A (en) * | 2023-11-14 | 2023-12-15 | 湖南禧又多油脂有限公司 | Automatic control system for vegetable oil low-temperature extraction treatment based on Internet of things |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117225004A (en) * | 2023-11-14 | 2023-12-15 | 湖南禧又多油脂有限公司 | Automatic control system for vegetable oil low-temperature extraction treatment based on Internet of things |
| CN117225004B (en) * | 2023-11-14 | 2024-01-26 | 湖南禧又多油脂有限公司 | Automatic control system for vegetable oil low-temperature extraction treatment based on Internet of things |
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