Ginger extract and method for refining the same

Abstract

The present application relates to the technical field of extract refining, and specifically discloses a ginger extract and a refining method thereof. The method for refining the ginger extract comprises the following steps: (1) dispersing and dissolving ginger extract raw materials by using low-carbon alcohol to obtain a first material liquid; the ginger extract raw materials are obtained by supercritical carbon dioxide extraction of ginger; (2) adjusting the pH value of the first material liquid to 12-13, fully reacting, and then adjusting the pH value to 5-6 to obtain a second material liquid; (3) concentrating the second material liquid to a low-carbon alcohol concentration of 15%-45%, and then standing and separating to obtain a lower layer material; and (4) fully mixing the lower layer material with low-carbon alcohol with a concentration of 15%-45%, standing, and then separating and collecting a lower layer. The method can effectively remove the pesticide residues in the ginger extract raw materials, and obtain a safer product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of extract refining, in particular to a ginger extract and a refining method thereof. BACKGROUND

[0002] Ginger is a perennial herb of Zingiberaceae and Zingiber. Ginger is warm, and its unique gingerol can stimulate the gastrointestinal mucosa, cause the gastrointestinal tract to hyperemia, and enhance the digestive capacity, which can effectively treat abdominal distension, abdominal pain, diarrhea, vomiting and other symptoms caused by eating too much cold food. After eating ginger, people will have a body fever, which is because it can dilate blood vessels, speed up blood circulation, and promote the opening of the pores on the body, which not only takes away excess heat, but also takes out the bacteria and cold in the body.

[0003] The extraction methods of ginger extract currently mainly include steam distillation, solvent extraction, ultrasonic method, supercritical carbon dioxide extraction and pressing method. At present, the supercritical carbon dioxide extraction technology is relatively mature, and the extraction temperature is low in the supercritical carbon dioxide extraction process, and the yield of ginger essential oil and gingerol is ideal, which is very suitable for large-scale ginger raw material processing and industrial production.

[0004] However, in order to maximize the yield of ginger, excessive pesticides are usually used to fumigate the planting area before planting to prevent insect erosion and virus infection. During the planting process, pesticides need to be sprayed intermittently to prevent insects and ensure the healthy growth of ginger seedlings. A large amount of pesticides need to be sprayed during the storage process after harvesting to prevent bacteria and insects. This leads to the problem of excessive pesticide residues in the output ginger. When extracted by supercritical carbon dioxide extraction, part of the pesticide residues in the ginger raw material will migrate to the ginger extract product, and the types of pesticide residues are complex and diverse, and the dose is excessive. The main types of pesticide residues include organophosphorus pesticide residues and organochlorine pesticide residues, and pesticide residues have become one of the main factors limiting the application of ginger extract in food.

[0005] At present, there are related preparation technologies for removing pesticide residues, some of which involve using supercritical carbon dioxide extraction technology for separation. For example, Chinese patent CN116474415A separates pesticide residues in ginger oleoresin by using ginger essential oil as a carrier. However, the operation is complex, and the effect of removing pesticide residues still needs to be improved. Therefore, further research is needed on the removal of pesticide residues from ginger extract. SUMMARY

[0006] One of the purposes of the present application is to provide a refining method of ginger extract with low pesticide residues and high yield.

[0007] The present application provides a method for refining ginger extract, which comprises:

[0008] (1) using low carbon alcohol dispersion to dissolve ginger extract raw material to obtain liquid one; the ginger extract raw material is obtained by supercritical carbon dioxide extraction of ginger;

[0009] (2) adjusting the pH value of the liquid one to 12-13, fully reacting, then adjusting the pH value to 5-6 to obtain liquid two;

[0010] (3) concentrating the liquid two to a low carbon alcohol concentration of 15%-45%, then standing at 30-50℃ to separate and obtain the lower layer material (oil resin);

[0011] (4) fully mixing the lower layer material with low carbon alcohol with a concentration of 15%-45% at 30-50℃, then standing and collecting the lower layer.

[0012] The present application researches and finds that the ginger extract obtained by supercritical carbon dioxide extraction of ginger has serious pesticide residue problems and cannot meet the application requirements. Further research finds that when the ginger extract obtained by supercritical carbon dioxide extraction of ginger is first dissolved and dispersed, and then the pH value is adjusted to a specific alkaline condition for full reaction, thiamethoxam and fosthiazate can be effectively removed. Then, by adjusting the pH value of the liquid to 5-6, and then purifying and washing the liquid at a specific temperature when the alcohol concentration in the liquid is in a specific range, other pesticide residues can be further removed, and finally low-pesticide-residue ginger extract is obtained.

[0013] If the pH value of the liquid is not within the range defined in the present application when the liquid is fully reacted under alkaline conditions, the full removal of pesticide residues and the high yield of gingerols in the product cannot be considered. If the concentration of the alcohol solution is too low or the temperature is too low during purification and washing, it is not conducive to the full removal of pesticide residues. If the concentration of the alcohol solution is too high or the temperature is too high, it will affect the yield of gingerols in the product. Under the purification and washing conditions defined in the present application, the yield of gingerols can be improved.

[0014] Compared with the traditional pesticide residue removal method, the method of the present application has the advantages of being safer, more environmentally friendly, low in production cost, and suitable for industrial large-scale production. The ginger extract obtained by the method has high gingerol purity and can be used for high-value utilization.

[0015] The ginger extract raw material of the present application can be produced by the supercritical carbon dioxide extraction method known in the art. For example, the specific production method includes: after the dried ginger slices are crushed and put into the supercritical carbon dioxide extraction kettle, the extraction kettle pressure is increased to 25-30 MPa, the temperature is maintained at 35-55℃, the carbon dioxide flow rate is 5-10 kg / h per kilogram of dried ginger raw material, the extraction time is 3-5 h, the separation kettle pressure is 6-10 MPa, and the separation kettle temperature is 30-50℃.

[0016] The pesticide residue types include one or more of organophosphorus pesticides, organochlorine pesticides and phenylamide pesticides. The organophosphorus pesticides include thiamethoxam, imidacloprid, phosphoramidon, clothianidin, etc., the organochlorine pesticides include chlorpyrifos, etc., and the phenylamide pesticides include metalaxyl, etc.

[0017] In the present application, the pH value can be adjusted by using sodium hydroxide, potassium hydroxide, hydrochloric acid, phosphoric acid or nitric acid, etc., preferably sodium hydroxide and hydrochloric acid.

[0018] In the step (1) of the method of the present application, the low-carbon alcohol is one or more of ethanol and methanol; and the concentration of the low-carbon alcohol is greater than or equal to 55%, preferably 55%-95%.

[0019] Further preferably, the low-carbon alcohol is ethanol; and the concentration of the low-carbon alcohol is 65%.

[0020] The present application preferably uses aqueous ethanol solution, which is conducive to industrial recycling.

[0021] In the method of the present application, the mass / volume ratio of the ginger extract raw material to the low-carbon alcohol is 1: (3-7) g / mL; and / or, in the step (1), the dispersion and dissolution is carried out at 25-50°C.

[0022] Preferably, the mass / volume ratio of the ginger extract raw material to the low-carbon alcohol is 1:4 g / mL; and the dispersion and dissolution is carried out at 30-50°C (preferably 35-45°C).

[0023] In the step (4) of the method of the present application, the mass / volume ratio of the lower layer material to the low-carbon alcohol is 1: (1-3) g / mL.

[0024] In the step (2) of the method of the present application, the sufficient reaction is carried out at 25-55°C, and the reaction time is 1-3h.

[0025] Preferably, in the step (2), the sufficient reaction is carried out at 30-50°C (more preferably 35-45°C). The reaction under the conditions of the present application can ensure that the reaction is carried out sufficiently, and is also conducive to avoiding the loss of gingerol yield.

[0026] After the step (4) of the method of the present application, a step of removing residual solution is further included.

[0027] The conditions for removing residual solution can be: water bath temperature 55°C-70°C, vacuum degree -0.06MPa to -0.1Mpa.

[0028] In the step (3) of the method of the present application, the concentration conditions are: water bath temperature 55°C-70°C, vacuum degree -0.06MPa to -0.1MPa.

[0029] In the method of the present application, step (4) is preferably repeated for 2-5 times, more preferably 2-3 times, so as to balance the effect of removing pesticide residues and production efficiency.

[0030] The present application also provides a ginger extract prepared by the above method.

[0031] The ginger extract obtained by the method of the present application has low pesticide residues, and no residues of thiamethoxam, fosthiazate, chlorpyrifos, metalaxyl, etc. (detection limit 0.1 ppm) are detected.

[0032] The present application has at least the following beneficial effects:

[0033] The present application provides a method for removing pesticide residues in ginger extract, solves the problem of excessive pesticide residues in ginger extract products, and has the advantages of simple process operation, low cost, effective application in large-scale production, complete separation of gingerols and pesticide residues, and preparation of clean and safe ginger extract products. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described in detail below with reference to the examples. It should be understood that the following examples are given only for the purpose of illustration and are not intended to limit the scope of the present application. Those skilled in the art can make various modifications and substitutions to the present application without departing from the spirit and principles of the present application.

[0035] The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following examples can be obtained from commercial sources or prepared according to conventional methods in the art unless otherwise specified.

[0036] The raw material used in the embodiments of the present application is a ginger extract produced by supercritical carbon dioxide extraction for the purpose of extracting gingerols. The specific production method is as follows: dry ginger slices are crushed and then fed into a supercritical carbon dioxide extraction kettle. The extraction kettle pressure is raised to 28 MPa, the temperature is maintained at 45℃, the carbon dioxide flow rate is 8 kg / h per kg of dry ginger raw material, the extraction time is 4 h, the separation kettle pressure is 8 MPa, and the separation kettle temperature is 40℃.

[0037] The final ginger extract contains 41.35% gingerols (including 6-gingerol, 8-gingerol, 10-gingerol, 6-shogaol, 8-shogaol), 2.13 ppm chlorpyrifos, 3.73 ppm thiamethoxam, 2.46 ppm imidacloprid, 1.72 ppm fosthiazate, and 6.25 ppm metalaxyl.

[0038] In the present application, chlorpyrifos, fosthiazate, and metalaxyl are detected according to GB 23200.113, thiamethoxam is detected according to GB 23200.9, and imidacloprid is detected according to GB / T 20769.

[0039] Example 1

[0040] The present embodiment provides a method for removing pesticide residues in ginger extract, the specific steps are as follows:

[0041] 1. Take 100 kg of ginger extract raw material, add 4 times the volume (L) of ethanol solution (concentration 65%) of the extract weight, stir at 40°C for 0.5 h to obtain a first liquid;

[0042] 2. Add sodium hydroxide reagent to the first liquid, adjust pH to 12.5, stir at 40°C for 2 h, then add hydrochloric acid diluent to the liquid, adjust pH to 5.5, to obtain a second liquid;

[0043] 3. Concentrate the second liquid to a concentration of 30% ethanol in the liquid under the conditions of a water bath temperature of 65°C and a vacuum degree of -0.08 MPa, then stand at 40°C for 0.5 h, and collect the lower layer;

[0044] 4. Add 30% ethanol solution (liquid ratio 1:2 kg / L) to the lower layer material again, stir at 40°C for 1 h, stand for 0.5 h, and collect the lower layer material. Repeat the ethanol solvent washing according to the above operation for a total of 3 times, combine the upper ethanol solutions after each washing, and separately remove the dissolved residues (water bath temperature 65°C, vacuum degree -0.08 MPa) from the combined upper ethanol solution and the lower layer material. After concentrating the lower layer, 86.69 kg of pesticide-free ginger oleoresin is obtained, with a gingerol content of 39.87%, a content yield of 83.59%, and no chlorpyrifos, thiamethoxam, imidacloprid, thiofanox, or metalaxyl detected (detection limit 0.1 ppm). After concentrating the ethanol solution, 12.43 kg of ordinary ginger oleoresin is obtained, with a gingerol content of 41.43%, a content yield of 12.45%, chlorpyrifos 2.81 ppm, imidacloprid 3.47 ppm, metalaxyl 10.84 ppm, and no thiamethoxam or thiofanox detected (detection limit 0.1 ppm). The total gingerol content yield is 96.04%.

[0045] Example 2

[0046] The present embodiment provides a method for removing pesticide residues in ginger extract, the specific steps are as follows:

[0047] 1. Take 100 kg of ginger extract raw material, add 7 times the volume (L) of ethanol solution (concentration 55%) of the extract weight, stir at 50°C for 0.5 h to obtain a first liquid;

[0048] 2. Add sodium hydroxide reagent to the first liquid, adjust pH to 12.0, stir at 55°C for 3 h, then add hydrochloric acid diluent to the liquid, adjust pH to 5, to obtain a second liquid;

[0049] 3. Concentrate the solution two under the condition of water bath temperature 70℃ and vacuum degree -0.06 MPa until the concentration of ethanol in the solution is 15%, then stand still at 50℃ for 0.5h, and collect the lower layer;

[0050] 4. Add 15% ethanol solution (solution ratio 1:3 kg / L) to the lower layer, stir at 50℃ for 1h, stand still for 0.5h, and collect the lower layer. Repeat the ethanol solvent washing according to the above operation for 5 times. Combine the upper ethanol solution after each washing, and desolventize the combined upper ethanol solution and the lower layer respectively (water bath temperature 70℃, vacuum degree -0.06 MPa). The lower layer after concentration obtains 86.82 kg of ginger oil resin with pesticide residues removed, with gingerol content 40.03% and content yield 84.05%. Chlorpyrifos, thiamethoxam, imidacloprid, cadmium sulfide and metalaxyl are not detected (detection limit 0.1 ppm). The ethanol solution after concentration obtains 12.14 kg of ordinary ginger oil resin, with gingerol content 41.12% and content yield 12.07%. Chlorpyrifos 2.45 ppm, imidacloprid 3.45 ppm, metalaxyl 9.74 ppm, thiamethoxam and cadmium sulfide are not detected (detection limit 0.1 ppm). The total gingerol content yield is 96.12%.

[0051] Example 3

[0052] The present embodiment provides a method for removing pesticide residues in ginger extract, and the specific steps are as follows:

[0053] 1. Take 100 kg of ginger extract raw material, add 3 times the volume (L) of ethanol solution (concentration 95%) to the extract, stir at 25℃ for 0.5h to obtain solution one;

[0054] 2. Add sodium hydroxide reagent to the solution one, adjust pH to 13.0, and stir at 25℃ for 1h. Then add hydrochloric acid diluent to the solution, adjust pH to 6, and obtain solution two;

[0055] 3. Concentrate the solution two under the condition of water bath temperature 55℃ and vacuum degree -0.1 MPa until the concentration of ethanol in the solution is 45%, then stand still at 30℃ for 0.5h, and collect the lower layer;

[0056] 4. Add 45% ethanol solution (1:1 kg / L) to the lower layer material again, stir at 30°C for 1 h, stand for 0.5 h, and collect the lower layer material. Repeat the ethanol solvent washing according to the above operation for 2 times, combine the upper ethanol solutions after each washing, and desolventize the combined upper ethanol solution and the lower layer material respectively (water bath temperature is 55°C, vacuum degree is -0.1 MPa). After the lower layer is concentrated, 85.46 kg of pesticide residue-removed ginger oleoresin is obtained, with a gingerol content of 39.68% and a content yield of 82.01%, and chlorpyrifos, thiamethoxam, imidacloprid, ethoprophos, and metalaxyl are not detected (detection limit is 0.1 ppm). After the ethanol solution is concentrated, 12.76 kg of ordinary ginger oleoresin is obtained, with a gingerol content of 42.35% and a content yield of 13.07%, chlorpyrifos is 3.21 ppm, imidacloprid is 3.97 ppm, metalaxyl is 11.23 ppm, thiamethoxam and ethoprophos are not detected (detection limit is 0.1 ppm), and the total gingerol content yield is 95.08%.

[0057] Comparative Example 1

[0058] This comparative example provides a method for removing pesticide residues in ginger extract, and the specific method is basically the same as that of Example 1, except that in step 2, sodium hydroxide reagent is added to the material solution one, and the pH is adjusted to 14, and the remaining steps are the same as those of Example 1. After the final lower layer is concentrated, 86.61 kg of pesticide residue-removed ginger oleoresin is obtained, with a gingerol content of 23.17% and a content yield of 48.53%, and chlorpyrifos, thiamethoxam, imidacloprid, ethoprophos, and metalaxyl are not detected (detection limit is 0.1 ppm). After the ethanol solution is concentrated, 12.46 kg of ordinary ginger oleoresin is obtained, with a gingerol content of 24.15%, chlorpyrifos is 0.41 ppm, imidacloprid is 0.35 ppm, metalaxyl is 0.48 ppm, thiamethoxam and ethoprophos are not detected (detection limit is 0.1 ppm), and the content yield is 7.28%. The total gingerol content yield is 55.81%.

[0059] Comparative Example 2

[0060] The comparative example provides a method for removing pesticide residues in ginger extract, and the specific method is basically the same as that of example 1, the difference is that in step 2, sodium hydroxide reagent is added to the feed liquid 1, and the pH is adjusted to 11. After the final lower layer is concentrated, 86.72 kg of pesticide-free ginger oleoresin is obtained, the gingerol content is 40.56%, the content yield is 85.06%, chlorpyrifos is 1.31 ppm, thiamethoxam is 0.27 ppm, imidacloprid is 0.73 ppm, phosphorothioic acid is 0.11 ppm, and metalaxyl is 1.97 ppm. After the ethanol solution is concentrated, 12.38 kg of ordinary ginger oleoresin is obtained, the gingerol content is 41.96%, the content yield is 12.56%, chlorpyrifos is 5.42 ppm, thiamethoxam is 1.17 ppm, imidacloprid is 4.38 ppm, phosphorothioic acid is 0.89 ppm, and metalaxyl is 28.36 ppm. The total content yield of gingerol is 97.63%.

[0061] Comparative example 3

[0062] The comparative example provides a method for removing pesticide residues in ginger extract, and the specific method is basically the same as that of example 1, the difference is that the feed liquid 2 obtained in step 2 is directly concentrated to remove pesticide residues, and the ethanol separation and washing procedures in steps 3 and 4 are not performed. Finally, 99.87 kg of pesticide-free ginger oleoresin is obtained, the gingerol content is 39.92%, the content yield is 96.42%, chlorpyrifos is 0.16 ppm, thiamethoxam is not detected, imidacloprid is 0.39 ppm, phosphorothioic acid is not detected, and metalaxyl is 0.48 ppm.

[0063] Comparative example 4

[0064] The comparative example provides a method for removing pesticide residues in ginger extract, and the specific method is basically the same as that of example 1, the difference is that steps 1, 2, and 3 are not performed, and the ginger extract raw material is directly added to 30% ethanol and washed 4 times (feed liquid ratio 1:2 kg / L). After the final lower layer is concentrated, 86.43 kg of pesticide-free ginger oleoresin is obtained, the gingerol content is 40.97%, the content yield is 85.64%, chlorpyrifos is 1.43 ppm, thiamethoxam is 0.75 ppm, imidacloprid is 1.33 ppm, phosphorothioic acid is 0.42 ppm, and metalaxyl is 2.52 ppm. After the ethanol solution is concentrated, 12.53 kg of ordinary ginger oleoresin is obtained, the gingerol content is 42.76%, the content yield is 12.96%, chlorpyrifos is 7.08 ppm, thiamethoxam is 24.62 ppm, imidacloprid is 10.65 ppm, phosphorothioic acid is 10.87 ppm, and metalaxyl is 31.37 ppm. The total content yield of gingerol is 98.59%.

[0065] Comparative example 5

[0066] The comparative example provides a method for removing pesticide residues in ginger extract, the specific method is basically the same as that of example 1, the difference is only that in step 3, the feed liquid is concentrated to an ethanol content of <1%, the lower layer of ginger oleoresin is washed 4 times with 30% ethanol, and the steps not described are the same as those of example 1. After final concentration of the lower layer, 86.53 kg of pesticide residue-free ginger oleoresin is obtained, the gingerol content is 39.85%, the content yield is 83.39%, chlorpyrifos is 0.12 ppm, thiamethoxam is not detected, imidacloprid is 0.11 ppm, phosalone is not detected, metalaxyl is 0.15 ppm, and 12.28 kg of ordinary ginger oleoresin is obtained after concentration of the ethanol solution, the gingerol content is 41.41%, the content yield is 12.30%, chlorpyrifos is 1.74 ppm, imidacloprid is 2.84 ppm, metalaxyl is 9.97 ppm, thiamethoxam and phosalone are not detected (detection limit 0.1 ppm), and the total gingerol content yield is 95.69%.

[0067] Comparative example 6

[0068] The comparative example provides a method for removing pesticide residues in ginger extract, the specific method is basically the same as that of example 1, the difference is only that in step 3, the feed liquid is concentrated to an ethanol content of <1%, the lower layer of ginger oleoresin is washed 4 times with 30% ethanol, and the steps not described are the same as those of example 1. After final concentration of the lower layer, 86.53 kg of pesticide residue-free ginger oleoresin is obtained, the gingerol content is 39.85%, the content yield is 83.39%, chlorpyrifos is 0.12 ppm, thiamethoxam is not detected, imidacloprid is 0.11 ppm, phosalone is not detected, metalaxyl is 0.15 ppm, and 12.28 kg of ordinary ginger oleoresin is obtained after concentration of the ethanol solution, the gingerol content is 41.41%, the content yield is 12.30%, chlorpyrifos is 1.74 ppm, imidacloprid is 2.84 ppm, metalaxyl is 9.97 ppm, thiamethoxam and phosalone are not detected (detection limit 0.1 ppm), and the total gingerol content yield is 95.69%.

[0069] Comparative example 7

[0070] The comparative example 2 provides a method for removing pesticide residues in ginger extract, the specific method is basically the same as that of the example 1, the difference is that in step 3, the feed liquid is concentrated to the concentration of ethanol in the feed liquid is 50%, and then the lower layer is collected after standing at 40℃ for 0.5h, and in step 4, the lower layer is washed with 50% ethanol solution again, and the remaining steps are the same as those of the example 1. Finally, after concentration, 57.32kg of pesticide residue-free ginger oleoresin is obtained, the gingerol content is 31.54%, the content yield is 43.72%, and chlorpyrifos, thiamethoxam, imidacloprid, thiofanox and metalaxyl are not detected. After concentration of the ethanol solution, 42.45kg of ordinary ginger oleoresin is obtained, the gingerol content is 51.03%, the content yield is 52.39%, chlorpyrifos is 0.89ppm, imidacloprid is 0.73ppm, metalaxyl is 2.51ppm, thiamethoxam and thiofanox are not detected (the detection limit is 0.1ppm), and the total gingerol content yield is 96.11%.

[0071] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of the present application claimed.

Claims

1. A method for refining a ginger extract, characterized by, The method comprises the following steps: (1) dispersing and dissolving ginger extract raw material in low-carbon alcohol to obtain a first solution; the ginger extract raw material is obtained by supercritical carbon dioxide extraction of ginger; the low-carbon alcohol is one or more of ethanol and methanol; (2) adjusting the pH value of the first solution to 12-13, fully reacting, then adjusting the pH value to 5-6 to obtain a second solution; (3) concentrating the second solution to a low-carbon alcohol concentration of 15%-45%, and then standing at 30-50℃ to separate a lower layer material; (4) mixing the lower layer material with low-carbon alcohol with a concentration of 15%-45% at 30-50℃, and then standing to collect the lower layer.

2. The method of claim 1, wherein, In step (1), the concentration of the low-carbon alcohol is ≥55%.

3. The method of claim 2, wherein, The concentration of the low-carbon alcohol is 65%-85%.

4. The method of claim 3, wherein, In step (1), the low-carbon alcohol is ethanol; the concentration of the low-carbon alcohol is 65%.

5. The method according to any one of claims 1 to 4, characterized in that, The mass-volume ratio of the ginger extract raw material and the low-carbon alcohol is 1:(3-7) g / mL; In step (1), the dispersing and dissolving is performed at 25-50℃.

6. The method of claim 5, wherein, The mass-volume ratio of the ginger extract raw material and the low-carbon alcohol is 1:4 g / mL; the dispersing and dissolving is performed at 30-50℃.

7. The method according to any of claims 1 to 4, 6, characterized in that, In step (4), the mass-volume ratio of the lower layer material and the low-carbon alcohol is 1:(1-3) g / mL.

8. The method of claim 5, wherein, In step (4), the mass-volume ratio of the lower layer material and the low-carbon alcohol is 1:(1-3) g / mL.

9. The method according to any of claims 1-4, 6, 8, characterized in that, In step (2), the fully reacting is performed at 25-55℃.

10. The method of claim 5, wherein, In step (2), the fully reacting is performed at 25-55℃.

11. The method of claim 7, wherein, In step (2), the fully reacting is performed at 25-55℃.

12. The method of claim 9, wherein, In step (2), the fully reacting is performed at 30-50℃ for 1-3 hours.

13. The method of claim 10 or 11, wherein, In step (2), the fully reacting is performed at 30-50℃ for 1-3 hours.

14. The method of any one of claims 1-4, 6, 8, 10-12, wherein, After step (4), a step of removing residual solution is further included.

15. The method of claim 5, wherein, After step (4), a step of removing residual solution is further included.

16. The method of claim 7, wherein, After step (4), a step of removing residual solution is further included.

17. The method of claim 9, wherein, After step (4), a step of removing residual solution is further included.

18. The method of claim 13, wherein, After step (4), a step of removing residual solution is further included.

19. The method of any one of claims 1-4, 6, 8, 10-12, 15-18, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

20. The method of claim 5, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

21. The method of claim 7, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

22. The method of claim 9, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

23. The method of claim 13, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

24. The method of claim 14, wherein, In step (3), the concentration is performed under the following conditions: water bath temperature 55-70℃, vacuum degree -0.06 MPa to -0.1 MPa.

25. The method of any one of claims 1-4, 6, 8, 10-12, 15-18, 20-24, wherein, Step (4) is repeated for 2-5 times.

26. The method of claim 5, wherein, Step (4) is repeated for 2-5 times.

27. The method of claim 7, wherein, Step (4) is repeated 2-5 times.

28. The method of claim 9, wherein, Step (4) is repeated 2-5 times.

29. The method of claim 13, wherein, Step (4) is repeated 2-5 times.

30. The method of claim 14, wherein, Step (4) is repeated 2-5 times.

31. The method of claim 19, wherein, Step (4) is repeated 2-5 times.

32. A ginger extract, characterized in that, obtained by the process of any one of claims 1-31.