Method for preparing instant ampelopsis grossedentata powder through double-effect extraction

Abstract

The invention provides a method for preparing instant ampelopsis grossedentata powder through double-effect extraction, which comprises the following steps: S1, raw material treatment: drying and crushing ampelopsis grossedentata raw materials; s2, performing double-effect extraction, namely extracting the ampelopsis grossedentata raw material and a solvent to obtain an extraction solution A, uniformly dividing the extracted ampelopsis grossedentata raw material into two parts, and respectively extracting the two parts with the solvent to obtain an extraction solution B and an extraction solution C; s3, filtering and concentrating, namely filtering the leach liquor A, the leach liquor B and the leach liquor C, cooling and settling the leach liquor A to obtain supernate D, uniformly mixing the leach liquor B and the leach liquor C, cooling and settling to obtain supernate E, and concentrating the supernate D and the supernate E to obtain concentrated liquor F and concentrated liquor G; s4, blending and sterilizing: respectively adding beta-cyclodextrine and maltodextrin into the concentrated solution F and the concentrated solution G, dissolving to obtain blended solutions H and I, and sterilizing and cooling the blended solutions H and I; and S5, drying the finished product: drying the blending liquid H and I to obtain tea powder J and tea powder K, and uniformly mixing the tea powder J and the tea powder K to obtain the instant ampelopsis grossedentata powder. The ampelopsis grossedentata powder is convenient to dissolve, and has good use feeling and nutritional effect.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of rattan tea powder, in particular to a method for preparing instant rattan tea powder by double-effect extraction. Background Art

[0002] Rattan tea has medicinal effects, can enhance immunity, moisten the lungs and relieve cough, detoxify the liver, purify the heart, strengthen the spleen, and strengthen the kidneys. It can eliminate blood toxins in the body in many ways, improve blood quality, restore the normal endocrine system of the five internal organs, and comprehensively improve the body's immune ability; lower blood lipids, dihydromyricetin in rattan tea has the effect of anti-oxidant free radicals, can inhibit the formation of venous thrombosis in the body, and has a unique effect on lowering blood lipids. Total flavonoids have the effects of lowering blood lipids, anti-atherosclerosis and inhibiting the formation of mild fatty liver; delaying aging, rattan tea can delay aging. Because rattan tea contains a large amount of flavonoids, it has a very high scavenging rate for free radicals, can reduce oxidative damage in the body, and has an anti-aging effect. Drinking a little rattan tea in daily life can delay aging;

[0003] The rattan tea is prepared into an instant tea powder, which is easy to carry and use in daily life and can be quickly dissolved and drunk. In the preparation process of the rattan tea powder, the effective ingredients in the rattan tea raw materials need to be extracted, and because the extraction of different nutrients is affected by factors such as temperature, time, and concentration, different preparation processes have different effects on the nutritional components of the rattan tea powder products, and the taste and drinking feel of the rattan tea products obtained by different preparation processes are also different. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for preparing instant rattan tea powder by double-effect extraction, which can ensure that the prepared rattan tea powder product has sufficient effective ingredients, is easy to dissolve and has a good taste.

[0005] According to an embodiment of the present invention, a method for preparing instant rattan tea powder by double-effect extraction is provided, comprising the following steps:

[0006] S1, raw material processing, drying and crushing the rattan tea raw materials;

[0007] S2, double-effect extraction, taking rattan tea raw material and solvent in a mass ratio of 1:8-13, extracting at a temperature of 20-25°C to obtain extract A, dividing the extracted rattan tea raw material into two parts, extracting with the solvent in a mass ratio of 1-11-13 and 1:5-7 at a temperature of 85°C, respectively, to obtain extract B and extract C;

[0008] S3, filtering and concentrating, filtering the extracts A, B, and C, cooling the extract A at a temperature below 15° C. to separate and obtain a supernatant D, mixing the extracts B and C evenly, cooling and concentrating at a temperature below 15° C. to separate and obtain a supernatant E, and concentrating the supernatants D and E to obtain concentrated solutions F and G;

[0009] S4, preparing and sterilizing, adding β-cyclodextrin and maltodextrin to the concentrated solutions F and G respectively, and obtaining prepared solutions H and I after fully dissolving, sterilizing the prepared solutions H and I under high pressure conditions and cooling them to 45-60°C;

[0010] S5, drying the finished product, drying the sterilized mixed solutions H and I to obtain tea powder J and tea powder K respectively, and uniformly mixing the tea powder J and tea powder K to obtain instant rattan tea powder.

[0011] Preferably, in step S1, the raw material of rattan tea includes old and tender leaves, crushed powder or tender stems of rattan tea that have undergone primary processing; the degree of drying is that the moisture content is less than 8%; the degree of crushing is less than 40 mesh and the content of crushed powder accounts for less than 20%.

[0012] Further preferably, in step S2, the solvent is pure water with a resistivity of less than 10 MΩ*cm, the extraction time of the extract A is 30-60 min, and the extraction time of the extracts B and C is 30 min.

[0013] Further preferably, in step S3, the temperature of the extract A is maintained at 20-25°C during filtration, and the temperature of the extracts B and C is maintained at 45-60°C during filtration.

[0014] Further preferably, in step S3, a tubular centrifuge is used for separation, and the centrifugal flow rate is 300 L / hr.

[0015] Further preferably, in step S3, the extracts B and C are mixed and then rapidly cooled to 10-15° C. in a cooling barrel by means of a coil; cooled for 6 hours; and the precipitate is separated by a horizontal centrifuge to obtain a supernatant E.

[0016] Further preferably, in step S4, a triple-effect vacuum concentrator is used to concentrate the supernatants D and E respectively until the solid content is 15-20% Brix to obtain concentrated liquids F and G, and 0-5% β-cyclodextrin and 0-30% maltodextrin are added according to the solid content to fully dissolve them.

[0017] Further preferably, in step S5, a tube-in-tube or coil UHT instantaneous high temperature sterilization device is used, the sterilization temperature is controlled at 115-127°C, the sterilization time is 10-15s, and the temperature is cooled to 45-60°C.

[0018] Further preferably, in step S5, a pressure spray drying tower is used for drying, and the homogenization pressure is controlled to be 20 MPa, the temperature inside the tower is 90° C., and the exhaust temperature is 85° C.

[0019] Still more preferably, in step S5, the mixing ratio of tea powder J to tea powder K is 1:1-2.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The selectivity of raw materials is wider, and the old and young leaves, crushed powder or young stems of rattan tea that have undergone primary processing can all be used as production raw materials; firstly, part of the cold-soluble nutrients can be extracted through low-temperature extraction to ensure that the nutrients will not be affected by high temperature before use, and then the high-temperature extraction method can significantly ensure the full dissolution of various components in the rattan tea; and after the high-temperature extraction is completed, low-temperature sedimentation separation is performed, which can fully ensure that the components obtained by high-temperature extraction have good cold solubility; by adding a certain proportion of β-cyclodextrin and maltodextrin, substances that are easy to precipitate can be effectively embedded, so that the solubility of instant rattan tea powder is greatly improved. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below in conjunction with embodiments.

[0023] Embodiment 1:

[0024] S1, raw material processing, selecting old and young leaves, crushed powder or young stems of rattan tea that have undergone primary processing as raw materials for rattan tea, and drying and crushing the raw materials for rattan tea; making the moisture content of the raw materials for rattan tea less than 8%, and the crushed powder content of less than 40 mesh is less than 20%;

[0025] S2, double-effect extraction, prepare pure water with a resistivity of less than 10MΩ*cm as a solvent, take 1kg of rattan tea raw material and 8kg of solvent, mix them evenly, and then extract them at 20℃ for 30min to obtain extract A, divide the extracted rattan tea raw material into two parts, respectively mix them with 11kg of solvent and 5kg of solvent, mix them evenly, and then extract them at 85℃ for 30min to obtain extract B and extract C;

[0026] S3, filtering and concentrating, using a tubular centrifuge for filtration, with a centrifugal flow rate of 300L / hr, after filtering the extracts A, B, and C, the temperature of the extract A is maintained at 20°C when filtering, and the temperature of the extracts B and C is maintained at 45°C when filtering. The filtered extract A is cooled and settled at a temperature set at 13°C, and the supernatant D is separated; the extracts B and C are evenly mixed and cooled in a cooling barrel through a coil to quickly cool the temperature to 13°C, cooled and settled for 6 hours, and the precipitate is separated by a horizontal centrifuge to obtain the supernatant E. The supernatants D and E are concentrated by a triple-effect vacuum concentration device, respectively, and concentrated to a solid content of 15% Brix to obtain concentrated solutions F and G;

[0027] S4, preparation and sterilization, adding 1% β-cyclodextrin and 1% maltodextrin according to the solid content and fully dissolving them, obtaining preparation liquids H and I after fully dissolving, using a tube or coil UHT instantaneous high temperature sterilization equipment, controlling the sterilization temperature to 115° C., the sterilization time to 10 s, sterilizing the preparation liquids H and I, and then cooling them to 45° C.;

[0028] S5, drying the finished product, using a pressure spray drying tower to dry, controlling the homogenization pressure to 20 MPa, the temperature in the tower to 90° C., and the exhaust temperature to 85° C., drying the sterilized prepared liquids H and I to obtain tea powder J and tea powder K, respectively, and uniformly mixing the tea powder J and tea powder K in a mass ratio of 1:1 to obtain instant rattan tea powder X.

[0029] Embodiment 2:

[0030] S1, raw material processing, selecting old and young leaves, crushed powder or young stems of rattan tea that have undergone primary processing as raw materials for rattan tea, and drying and crushing the raw materials for rattan tea; making the moisture content of the raw materials for rattan tea less than 8%, and the crushed powder content of less than 40 mesh is less than 20%;

[0031] S2, double-effect extraction, prepare pure water with a resistivity of less than 10MΩ*cm as a solvent, take 1kg of rattan tea raw material and 10kg of solvent, mix them evenly, and then extract them at 23℃ for 40min to obtain extract A, divide the extracted rattan tea raw material into two parts, mix them with 12kg solvent and 6kg solvent respectively, mix them evenly, and then extract them at 85℃ for 30min to obtain extract B and extract C;

[0032] S3, filtering and concentrating, using a tubular centrifuge for filtration, with a centrifugal flow rate of 300L / hr, after filtering the extracts A, B, and C, the temperature of the extract A is maintained at 23°C when filtering, and the temperature of the extracts B and C is maintained at 50°C when filtering. The filtered extract A is cooled and settled at a temperature set to 14°C, and the supernatant D is separated; the extracts B and C are evenly mixed and cooled in a cooling barrel through a coil to quickly cool the temperature to 14°C, cooled and settled for 6 hours, and the precipitate is separated by a horizontal centrifuge to obtain a supernatant E. The supernatants D and E are concentrated by a triple-effect vacuum concentration device, respectively, and concentrated to a solid content of 18% Brix to obtain concentrated solutions F and G;

[0033] S4, preparation and sterilization, adding 3% β-cyclodextrin and 10% maltodextrin according to the solid content and fully dissolving them, obtaining preparation liquids H and I after fully dissolving, using a tube or coil UHT instantaneous high temperature sterilization equipment, controlling the sterilization temperature to 120° C., the sterilization time to 13 seconds, sterilizing the preparation liquids H and I, and then cooling them to 50° C.;

[0034] S5, drying the finished product, using a pressure spray drying tower to dry, controlling the homogenization pressure to 20Mpa, the temperature in the tower to 90°C, and the exhaust temperature to 85°C, drying the sterilized prepared liquids H and I to obtain tea powder J and tea powder K respectively, and uniformly mixing the tea powder J and tea powder K in a mass ratio of 1:1.5 to obtain instant rattan tea powder Y.

[0035] Embodiment three:

[0036] S1, raw material processing, selecting old and young leaves, crushed powder or young stems of rattan tea that have undergone primary processing as raw materials for rattan tea, and drying and crushing the raw materials for rattan tea; making the moisture content of the raw materials for rattan tea less than 8%, and the crushed powder content of less than 40 mesh is less than 20%;

[0037] S2, double-effect extraction, prepare pure water with a resistivity of less than 10MΩ*cm as a solvent, take 1kg of rattan tea raw material and 13kg of solvent, mix them evenly, and then extract them at 25℃ for 60min to obtain extract A, divide the extracted rattan tea raw material into two parts, respectively mix them with 13kg of solvent and 7kg of solvent, mix them evenly, and then extract them at 85℃ for 30min to obtain extract B and extract C;

[0038] S3, filtering and concentrating, using a tubular centrifuge for filtration, with a centrifugal flow rate of 300L / hr, after filtering the extracts A, B, and C, the temperature of the extract A is maintained at 25°C when filtering, and the temperature of the extracts B and C is maintained at 60°C when filtering. The filtered extract A is cooled and settled at a temperature set at 15°C, and the supernatant D is separated; the extracts B and C are evenly mixed and cooled in a cooling barrel through a coil to quickly cool the temperature to 15°C, cooled and settled for 6 hours, and the precipitate is separated by a horizontal centrifuge to obtain the supernatant E. The supernatants D and E are concentrated by a triple-effect vacuum concentration device, respectively, and concentrated to a solid content of 20% Brix to obtain concentrated solutions F and G;

[0039] S4, preparation and sterilization, adding 5% β-cyclodextrin and 30% maltodextrin according to the solid content and fully dissolving them, obtaining preparation liquids H and I after fully dissolving, using a tube or coil UHT instantaneous high temperature sterilization equipment, controlling the sterilization temperature to 127°C, the sterilization time to 15s, sterilizing the preparation liquids H and I, and then cooling them to 60°C;

[0040] S5, drying the finished product, using a pressure spray drying tower to dry, controlling the homogenization pressure to 20Mpa, the temperature in the tower to 90°C, and the exhaust temperature to 85°C, drying the sterilized prepared liquids H and I to obtain tea powder J and tea powder K respectively, and uniformly mixing the tea powder J and tea powder K in a mass ratio of 1:2 to obtain instant rattan tea powder Y.

[0041] Comparative example: using the existing preparation method to prepare rattan tea powder:

[0042] S1, raw material processing, selecting old and young leaves, crushed powder or young stems of rattan tea that have undergone primary processing as raw materials for rattan tea, and drying and crushing the raw materials for rattan tea; making the moisture content of the raw materials for rattan tea less than 8%, and the crushed powder content of less than 40 mesh is less than 20%;

[0043] S2, double-effect extraction, prepare pure water with a resistivity of less than 10MΩ*cm as a solvent, take 1kg of rattan tea raw material and 10kg of solvent, mix them evenly, and extract at 85℃ for 30min to obtain extract L;

[0044] S3, filtration and concentration, using a tubular centrifuge for filtration with a centrifugal flow rate of 300L / hr, filtering the extract L, maintaining the temperature at 50°C during filtration, cooling and settling the filtered extract L at a temperature set to 14°C, and separating to obtain a supernatant M; using a triple-effect vacuum concentrator, concentrating the supernatant M to a solid content of 18% Brix to obtain a concentrated solution N.

[0045] S4, preparation and sterilization, adding 3% β-cyclodextrin and 10% maltodextrin according to the solid content and fully dissolving them, obtaining a preparation liquid O after fully dissolving, using a tube or coil UHT instantaneous high temperature sterilization equipment, controlling the sterilization temperature to 120° C., the sterilization time to 13 seconds, sterilizing the preparation liquid O, and then cooling it to 50° C.;

[0046] S5, drying the finished product, using a pressure spray drying tower to dry, controlling the homogenization pressure to 20Mpa, the temperature in the tower to 90°C, and the exhaust temperature to 85°C, and drying the sterilized prepared liquid O to obtain instant rattan tea powder P.

[0047] Take instant rattan tea powder X, Y, Z, and P of equal mass, mix and dissolve with equal amount of cold water at room temperature, and invite multiple people to drink and sensory evaluate the dissolved tea, mainly from the perspective of vision, smell, and taste. The score is 1-100, and the higher the score, the better the experience. The average score of multiple people is shown in Table 1 below:

[0048] Table 1

[0049] Soup color odor taste X 92 93 92 Y 92 93 93 Z 93 92 95 P 90 89 91

[0050] Take the same mass of instant rattan tea powder X, Y, Z, P, and test the content of dihydromyricetin therein respectively. The test results are shown in Table 2 below:

[0051] Table 2

[0052] X Y Z P Dihydromyricetin content 25.9％ 26.1％ 26.2％ 23.3％

[0053] It can be seen from Table 1 that the instant rattan tea powder prepared by the present invention is not inferior to the rattan tea powder prepared by the existing method in terms of vision, smell and taste after dissolution, and thanks to the double-effect extraction method of the product, more nutrients can be extracted to a greater extent, ensuring the nutritional effect of the rattan tea powder.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for preparing instant rattan tea powder by double-effect extraction, characterized in that: The following steps are involved: S1, raw material processing, drying and crushing the rattan tea raw materials; S2, double-effect extraction, taking rattan tea raw material and solvent in a mass ratio of 1:8-13, extracting at a temperature of 20-25°C to obtain extract A, dividing the extracted rattan tea raw material into two parts, extracting with the solvent in a mass ratio of 1:11-13 and 1:5-7 at a temperature of 85°C, respectively, to obtain extract B and extract C; S3, filtering and concentrating, filtering the extracts A, B, and C, cooling and settling the extract A at a temperature below 15° C., separating and obtaining a supernatant D, mixing the extracts B and C evenly, cooling and settling the extracts at a temperature below 15° C., separating and obtaining a supernatant E, and concentrating the supernatants D and E to obtain concentrated solutions F and G; S4, preparing and sterilizing, adding β-cyclodextrin and maltodextrin to the concentrated solutions F and G respectively, and obtaining prepared solutions H and I after fully dissolving, sterilizing the prepared solutions H and I under high pressure conditions and cooling them to 45-60°C; S5, drying the finished product, drying the sterilized mixed solutions H and I to obtain tea powder J and tea powder K respectively, and uniformly mixing the tea powder J and tea powder K to obtain instant rattan tea powder.

2. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S1, the raw materials of rattan tea include old and tender leaves, crushed powder or tender stems of rattan tea that have undergone primary processing; the degree of drying is that the moisture content is less than 8%; the degree of crushing is that the content of crushed powder is less than 40 mesh and the proportion of crushed powder is less than 20%.

3. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S2, the solvent is pure water with a resistivity less than 10 MΩ*cm, the extraction time of the extract A is 30-60 min, and the extraction time of the extracts B and C is 30 min.

4. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S3, the temperature of the extract A is maintained at 20-25°C during filtration, and the temperature of the extracts B and C is maintained at 45-60°C during filtration.

5. The method for preparing instant rattan tea powder by double-effect extraction according to claim 4, characterized in that: In step S3, a tubular centrifuge is used for filtration, and the centrifugal flow rate is 300 L / hr.

6. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In the step S3, the extracts B and C are mixed and then rapidly cooled to 10-15° C. in a cooling barrel by means of a coil; cooled for 6 hours; and the precipitate is separated by a horizontal centrifuge to obtain a supernatant E.

7. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S3, a triple-effect vacuum concentrator is used to concentrate the supernatants D and E respectively until the solid content is 15-20% Brix to obtain concentrated solutions F and G; in step S4, 1-5% β-cyclodextrin and 1-30% maltodextrin are added according to the solid content to fully dissolve.

8. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S4, a tube-in-tube or coil UHT instantaneous high temperature sterilization device is used, the sterilization temperature is controlled at 115-127° C., the sterilization time is 10-15 seconds, and the temperature is cooled to 45-60° C.

9. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S5, a pressure spray drying tower is used for drying, and the homogenization pressure is controlled to be 20 MPa, the temperature inside the tower is 90° C., and the exhaust air temperature is 85° C.

10. The method for preparing instant rattan tea powder by double-effect extraction according to claim 1, characterized in that: In step S5, the mixing mass ratio of tea powder J to tea powder K is 1:1-2.