Prebiotic instant granules as well as preparation method and application thereof

Abstract

The invention provides prebiotic instant granules as well as a preparation method and application thereof, and belongs to the technical field of prebiotic instant granule processing. The preparation method of the prebiotic instant granules comprises the following steps: weighing the resistant dextrin, the xylooligosaccharide and the fructo-oligosaccharide, and mixing the resistant dextrin, the xylooligosaccharide and the fructo-oligosaccharide with 45-65% by volume of alcohol to obtain an adhesive; weighing resistant dextrin, xylooligosaccharide and fructo-oligosaccharide to obtain a mixed material, and adding an adhesive accounting for 4-13% of the weight of the mixed material to prepare particles; and drying the granules to obtain the prebiotic instant granules. The prebiotic instant granules obtained by the preparation method disclosed by the invention have the advantages of high dissolving speed, no caking, no sticking to teeth, no alcohol taste, mellow taste, large granules, fluffiness, uniform granules and good fluidity.

Description

Technical Field

[0001] The invention belongs to the technical field of prebiotic instant granule processing, and particularly relates to prebiotic instant granules and a preparation method and application thereof. Background Art

[0002] As a new type of dietary supplement, prebiotics have attracted extensive attention for their unique physicochemical properties and physiological activities. Prebiotics play an important role in maintaining intestinal health by inducing intestinal flora diversity, improving intestinal barrier integrity, improving intestinal microenvironment and metabolic balance, and have become an ideal functional factor. With the deepening of relevant research, the natural food resources of prebiotics are becoming more diverse. The way in which prebiotics exert their health-promoting effects can be summarized into two aspects: first, prebiotics are directly utilized by some microorganisms of the host, or indirectly stimulate the growth of beneficial microorganisms through cross-feeding, thereby playing a role in regulating the flora; second, prebiotics are metabolized by the flora to produce metabolites that are beneficial to the health of the host, such as short-chain fatty acids (SCFA) such as acetate, propionate and butyrate. Current studies have found that prebiotics have a variety of health-promoting effects, such as relieving constipation, promoting bone health, alleviating obesity, inhibiting pathogenic bacteria, reducing inflammation, and immunomodulating.

[0003] At present, prebiotics are used to replace sucrose to prepare instant products on the market to achieve the purpose of weight loss and fat reduction. However, there are still some problems with the taste of the preparation of prebiotic instant granules, such as low particle fluffiness, poor solubility, uneven particle size, agglomeration, and sticking to teeth. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a prebiotic instant granule and a preparation method and application thereof, aiming to solve the problems of the existing prebiotic instant granules such as low fluffiness, poor solubility, uneven particle size, agglomeration, and sticking to teeth.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: The invention provides a method for preparing prebiotic instant granules, comprising the following steps: weighing resistant dextrin, xylooligosaccharide and fructo-oligosaccharide, mixing the mixture with 45-65% by volume of alcohol to obtain an adhesive; weighing resistant dextrin, xylooligosaccharide and fructo-oligosaccharide to obtain a mixed material, adding 4-13% by weight of the mixed material as the adhesive to prepare granules; and drying the granules to obtain the prebiotic instant granules.

[0006] Preferably, in the preparation of the adhesive and the mixed material, the resistant dextrin is 75-85 parts by weight, the xylooligosaccharide is 10-20 parts by weight, and the fructo-oligosaccharide is 3-7 parts by weight.

[0007] Preferably, the resistant dextrin is 77-83 parts by weight, the xylooligosaccharide is 12-18 parts by weight, and the fructo-oligosaccharide is 4-6 parts by weight.

[0008] Preferably, the mass concentration of the adhesive is 35-45%.

[0009] Preferably, the granules are prepared by spray drying.

[0010] Preferably, the parameters of the spray drying granulation are set as follows: air inlet temperature 25-35°C, air inlet volume 18-38m 3 / h, liquid inlet speed 2.5-5.5ml / h, atomization pressure 0.08-0.58Mbar.

[0011] Preferably, the drying is carried out by alcohol recovery vacuum drying.

[0012] Preferably, the parameters of the alcohol recovery vacuum drying are set as: drying pressure -0.5-0.8MPa, drying temperature 35-62°C, and drying time 0.8-3.5h.

[0013] The present invention provides prebiotic instant granules obtained by the preparation method.

[0014] The present invention provides prebiotic instant granules obtained by the preparation method or use of the prebiotic instant granules in preparing functional products.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a preparation method of prebiotic instant granules, so that the obtained prebiotic instant granules have fast dissolution speed, no agglomeration, no stickiness to teeth, no alcohol taste, mellow taste, large granules, fluffy and good fluidity.

[0016] Furthermore, the present invention uses 60% alcohol to dissolve the adhesive, and then uses a boiling granulator to evenly spray it on the surface of the material by setting appropriate parameters, so that the material particles are evenly bonded, and the obtained particles have uniform shape, consistent color, and no moisture absorption, caking, or deliquescence.

[0017] Furthermore, the present invention uses a boiling granulator and an alcohol recovery vacuum dryer in combination, and after using alcohol to increase indicators such as particle size and fluffiness, the alcohol is recovered and reused, and the alcohol recovery rate is greater than 80%. The technical solution of the present invention optimizes the product while saving resources, reducing costs, and reducing environmental pollution. DETAILED DESCRIPTION

[0018] The present invention provides a method for preparing prebiotic instant granules, comprising the following steps: weighing resistant dextrin, xylooligosaccharide and oligofructose, mixing with 45-65% alcohol by volume to obtain an adhesive; weighing resistant dextrin, xylooligosaccharide and oligofructose to obtain a mixed material, adding 4-13% adhesive by weight of the mixed material to prepare granules; drying the granules to obtain prebiotic instant granules. The alcohol concentration of the present invention is preferably 48-63%, and more preferably 50-60%. The present invention sets a suitable alcohol concentration to improve the fluffiness of the prebiotic granules, and gelatinization will not occur during the preparation process, and the granulator will not stick. The obtained granules are not easy to absorb moisture, agglomerate and deliquescence, and the taste requirements are met while no alcohol taste remains. The amount of adhesive added in the present invention is preferably 4.5-12% by weight of the material, and more preferably 5-10%. The amount of adhesive added set in the present invention can be evenly bonded to the material during the preparation of the granules to obtain granules of uniform size and shape.

[0019] In the present invention, in the preparation of adhesives and mixed materials, the resistant dextrin is 75-85 parts by weight, the xylooligosaccharides are 10-20 parts by weight, and the oligofructose is 3-7 parts by weight; preferably, the resistant dextrin is 77-83 parts by weight, the xylooligosaccharides are 12-18 parts by weight, and the oligofructose is 4-6 parts by weight; further preferably, the resistant dextrin is 80 parts by weight, the xylooligosaccharides are 15 parts by weight, and the oligofructose is 5 parts by weight.

[0020] In the present invention, the mass concentration of the adhesive is 35-45%, preferably 38-43%, and more preferably 40%. The mass concentration of the adhesive set in the present invention enables the adhesive to be evenly sprayed in the boiling granulator during the preparation process to avoid the adhesive from sticking or having insufficient bonding effect.

[0021] In the present invention, the preparation of the granules is carried out by spray drying granulation. The process of spray drying granulation in the present invention comprises: adding resistant dextrin, oligoxylose and oligofructose into a boiling granulator, setting parameters, starting, and spraying a binder. The parameters of the spray drying granulation in the present invention are set as follows: air inlet temperature 25-35°C, air inlet volume 18-38m 3 / h, liquid inlet speed 2.5-5.5ml / h, atomization pressure 0.08-0.58Mbar; preferably, air inlet temperature 26-30℃, air inlet volume 20-35m 3 / h, liquid inlet speed 3-5ml / h, atomization pressure 0.1-0.5Mbar.

[0022] In the present invention, the drying adopts alcohol recovery vacuum drying. The parameters of the alcohol recovery vacuum drying of the present invention are set as: drying pressure -0.5~0.8MPa, drying temperature 35-62℃, drying time 0.8-3.5h; preferably drying pressure -0.4~0.6MPa, drying temperature 40-60℃, drying time 1-3h. In the present invention, too high drying temperature and too long drying time will cause the particles to gelatinize and stick to the pan, but too low drying temperature and short drying time will cause uneven particle size and small particles.

[0023] The present invention also provides prebiotic instant granules obtained by the preparation method. The prebiotic instant granules obtained by the preparation method of the present invention have fast dissolution speed, no agglomeration, no stickiness to teeth, no alcohol taste, mellow taste, large and fluffy granules, good fluidity, uniform adhesion between granules, uniform shape of granules, consistent chromaticity, no moisture absorption, agglomeration, deliquescence, and alcohol recovery rate of up to 89%.

[0024] The present invention also provides the prebiotic instant granules obtained by the preparation method or the use of the prebiotic instant granules in the preparation of functional products. The functional products of the present invention include but are not limited to food, health products, medicines and feed.

[0025] In the present invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.

[0026] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The boiling granulator FL-300 described in the embodiment of the present invention is sourced from Changzhou Haomai Drying Engineering Co., Ltd.; the alcohol recovery vacuum dryer ZDF-18 is sourced from Nanjing Suenrui Drying Equipment Co., Ltd.; the resistant dextrin powder (dietary fiber content is greater than or equal to 98%), xylooligosaccharide powder (xylooligosaccharide content is greater than or equal to 95%), and fructo-oligosaccharide powder (fructo-oligosaccharide content is greater than or equal to 95%) are sourced from Shandong Bailong Chuangyuan Biotechnology Co., Ltd.; erythritol (erythritol content is greater than or equal to 99.5%) is sourced from Bowling Biotechnology Co., Ltd.

[0028] Example 1 1. Prepare powder materials: weigh 80 parts by weight of resistant dextrin powder, 15 parts by weight of xylooligosaccharide powder and 5 parts by weight of fructo-oligosaccharide powder based on the total system dry basis.

[0029] 2. Prepare the adhesive: weigh the same mass of resistant dextrin powder, xylooligosaccharide powder and fructooligosaccharide powder as in step 1, mix them evenly, and dilute them with 60% volume percentage alcohol to a mixed solution with a mass concentration of 40% to obtain the adhesive.

[0030] 3. Granulation: Set the inlet air temperature of the boiling granulator to 26°C and the air volume to 30m 3 / h, the liquid feeding speed is 4.0ml / h, and the atomization pressure is 0.30Mbar; the material prepared in step 1 is added into the boiling granulator and mixed evenly, and the binder is sprayed at a spraying amount of 10% by weight of the dry basis of the material for boiling granulation.

[0031] 4. Alcohol recovery: Set the drying pressure of the alcohol recovery vacuum dryer to 0.1 MPa, the drying temperature to 48°C, and the drying time to 2 h. Put the obtained granules into the alcohol recovery vacuum dryer for drying, and recover the alcohol at the same time to obtain prebiotic instant granules.

[0032] The prepared prebiotic instant granules were observed and their size distribution was determined. The particle size distribution was determined by using a sample sieve to sequentially pass the prebiotic granules through 40 mesh, 60 mesh, and 80 mesh sieves for 10 minutes, and the masses of 4 different sizes of granules above 40 mesh, 40-60 mesh, 60-80 mesh, and below 80 mesh were obtained, and the distribution rate was calculated. The results are shown in Table 1. Observation and the results in Table 1 show that the granules are large and fluffy, and the granules are evenly bonded. The obtained granules have uniform shape, consistent color, and no moisture absorption, agglomeration, or deliquescence.

[0033] The alcohol recovery rate obtained by dividing the alcohol recovered in step 4 by the alcohol used in the preparation process is 89%.

[0034] Table 1 Size distribution of prebiotic instant granules in Example 1

[0035] Example 2 1. Prepare powder materials: weigh 80 parts by weight of resistant dextrin powder, 15 parts by weight of xylooligosaccharide powder and 5 parts by weight of fructo-oligosaccharide powder based on the total system dry basis.

[0036] 2. Prepare the adhesive: weigh the same mass of resistant dextrin powder, xylooligosaccharide powder and fructooligosaccharide powder as in step 1, mix them evenly, and dilute them with 50% by volume alcohol to a mixed solution with a mass concentration of 40% to obtain the adhesive.

[0037] 3. Granulation: Set the inlet air temperature of the boiling granulator to 30°C and the air volume to 35m 3 / h, the liquid feeding speed is 3.0ml / h, and the atomization pressure is 0.10Mbar; the material prepared in step 1 is added into the boiling granulator and mixed evenly, and the binder is sprayed at a spraying amount of 8% by weight of the dry basis of the material for boiling granulation.

[0038] 4. Alcohol recovery: Set the drying pressure of the alcohol recovery vacuum dryer to 0.6 MPa, the drying temperature to 40°C, and the drying time to 1 h; dry the obtained granules through the alcohol recovery vacuum dryer, and recover the alcohol at the same time to obtain prebiotic instant granules.

[0039] The same detection method as in Example 1 was used to observe the status of the particles, the particle size distribution, and the alcohol recovery rate. The particle size distribution is shown in Table 2. The results showed that the particles were large and fluffy, the particles were evenly bonded, the obtained particles had a uniform shape, consistent chromaticity, no moisture absorption, agglomeration, or deliquescence, and the alcohol recovery rate was 86%.

[0040] Table 2 Size distribution of prebiotic instant granules in Example 2

[0041] Example 3 1. Prepare powder materials: weigh 80 parts by weight of resistant dextrin powder, 15 parts by weight of xylooligosaccharide powder and 5 parts by weight of fructo-oligosaccharide powder based on the total system dry basis.

[0042] 2. Prepare the adhesive: weigh the same mass of dextrin powder, xylooligosaccharide powder and fructo-oligosaccharide powder as in step 1, mix them evenly, and dilute them with 55% by volume alcohol to a mixed solution with a mass concentration of 40% to obtain the adhesive.

[0043] 3. Granulation: Set the air inlet temperature of the boiling granulator to 28°C, the air inlet volume to 20m3 / h, the liquid inlet speed to 5.0ml / h, and the atomization pressure to 0.50Mbar; add the material prepared in step 1 to the boiling granulator and mix well, and spray the binder at a spraying amount of 5% by mass of the dry basis of the material for boiling granulation.

[0044] 4. Alcohol recovery: Set the drying pressure of the alcohol recovery vacuum dryer to -0.4 MPa, the drying temperature to 60°C, and the drying time to 3 h; dry the obtained granules through the alcohol recovery vacuum dryer, and recover the alcohol at the same time to obtain prebiotic instant granules.

[0045] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 3. The results showed that the particles were large and fluffy, the particles were evenly bonded, the obtained particles had a uniform shape, consistent chromaticity, no moisture absorption, agglomeration, or deliquescence, and the alcohol recovery rate was 83%.

[0046] Table 3 Size distribution of prebiotic instant granules in Example 3

[0047] Comparative Example 1 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that 40% alcohol was used to dilute the mixed solution with a mass concentration of 40% in step 2, and the other steps and operations were the same as those in Example 1.

[0048] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 4. The results show that compared with Example 1, the obtained particle size is smaller, and most of them are concentrated below 80 meshes, because the alcohol concentration is too low, the viscosity of the adhesive is low, the fluffiness is not enough, and the particles are stuck to the granulator during preparation, and the particle distribution is uneven; the alcohol recovery rate is 82%.

[0049] Table 4 Size distribution of prebiotic instant granules in Comparative Example 1

[0050] Comparative Example 2 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that 80% alcohol was used to dilute the mixed solution with a mass concentration of 40% in step 2, and the other steps and operations were the same as those in Example 1.

[0051] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 5. The results show that compared with Example 1, the obtained particles are uneven and too large in size, and most of them are concentrated above 60 meshes. This is because the alcohol concentration is too high and the viscosity of the adhesive is too high, which affects the size of the particles. In addition, the high concentration of alcohol makes the product have a strong alcohol taste and sticks to the teeth. The alcohol recovery rate is 68%.

[0052] Table 5 Size distribution of prebiotic instant granules in comparative example 2

[0053] Comparative Example 3 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that softened water was used to dilute the mixed solution with a mass concentration of 40% in step 2, and the other steps and operations were the same as those in Example 1.

[0054] The same detection method as in Example 1 was used to observe the status of the particles and determine the particle size distribution. The particle size distribution is shown in Table 6. The results show that compared with Example 1, the obtained particles are larger, have a stronger granular feel, are harder, not fluffy, easily absorb moisture, agglomerate, and deliquesce, and the adhesive sticks to the granulator when sprayed and is easy to stick to the pot.

[0055] Table 6 Size distribution of prebiotic instant granules in comparative example 3

[0056] Comparative Example 4 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that in step 3, the spraying amount of the binder was 3% of the dry basis of the material, and the other steps and operations were the same as those of Example 1.

[0057] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 7. The results show that compared with Example 1, the obtained particles are uneven and too small in size, and most of them are concentrated below 80 meshes. Because the binder concentration is too low, resulting in insufficient viscosity, the prepared particles are small and uneven, and the alcohol recovery rate is 84%.

[0058] Table 7 Size distribution of prebiotic instant granules in Comparative Example 4

[0059] Comparative Example 5 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that in step 3, the spraying amount of the binder was 15% of the dry basis of the material, and the other steps and operations were the same as those of Example 1.

[0060] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 8. The results show that compared with Example 1, the obtained particles are uneven, the size is too large, and most of them are concentrated above 60 mesh. Because the binder concentration is too high, the viscosity is too high, so the prepared particles are larger, the particles are uneven, and they are easy to stick to the granulator when sprayed. The alcohol recovery rate is 84%.

[0061] Table 8 Size distribution of prebiotic instant granules in comparative example 5

[0062] Comparative Example 6 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that in step 1, powder materials and adhesives were prepared, and materials were weighed according to 72 parts by weight of resistant dextrin, 18 parts by weight of xylo-oligosaccharide powder, and 10 parts by weight of erythritol based on the total system dry basis, and other steps and operations were the same as in Example 1.

[0063] The same detection method as in Example 1 was used to observe the status of the particles, determine the particle size distribution and the alcohol recovery rate. The particle size distribution is shown in Table 9. The results show that compared with Example 1, the obtained particles are uneven, and most of the sizes are concentrated in 40-60 meshes, indicating that the molding effect of the particles prepared using erythritol as the material and the binder is poor, so the prepared particles are relatively uneven, and the alcohol recovery rate is 85%.

[0064] Table 9 Size distribution of prebiotic instant granules in Comparative Example 6

[0065] Comparative Example 7 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that in step 4, the drying temperature was 30° C. and the drying time was 4 h. The other steps and operations were the same as those in Example 1.

[0066] The alcohol recovery rate was calculated by the same method as in Example 1, and the alcohol recovery rate was 55%. The results show that the efficiency of alcohol recovery by low-temperature and long-term drying is low, and the effect of complete drying cannot be achieved, and the alcohol content of the particles is high.

[0067] Comparative Example 8 In this comparative example, prebiotic instant granules were prepared according to the preparation method of Example 1, except that in step 4, the drying temperature was 65° C. and the drying time was 0.5 h. The other steps and operations were the same as those in Example 1.

[0068] The alcohol recovery rate was detected by the same method as in Example 1, and the alcohol recovery rate was 38%. The results show that the efficiency of alcohol recovery by high temperature and short time drying is low. High temperature can speed up the recovery of alcohol, but the recovery is incomplete in a short time, and the alcohol content of the particles is high. If the time is extended, the brittleness of the particles will increase and more fine powder will be produced.

[0069] Experimental Example 1 The prebiotic instant granules prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to an angle of repose test to determine the fluidity of the prebiotic instant granules prepared in each group.

[0070] Angle of repose detection method: The fixed funnel method is used to determine the angle of repose of particles. A dry and clean funnel is fixed on an iron frame, and the bottom funnel mouth is 2.5 cm (H) away from the horizontal coordinate paper. The particles are poured into the funnel along the funnel wall until the tip of the particle cone formed by the last funnel touches the funnel mouth. The cone diameter (2R) is measured from the coordinate paper, then tanθ = H / R, and the angle θ is the angle of repose. The test results are shown in Table 10.

[0071] Table 10 Particle fluidity test

[0072] It can be seen from Table 10 that the prebiotic instant granules prepared by the present invention have high fluidity, which indicates that the present invention effectively increases the fluidity of the prebiotic instant granules.

[0073] Experimental Example 2 The prebiotic instant granules prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to hygroscopicity testing. Method for testing hygroscopicity of granules: Weigh the same mass of samples, place them in a room with the same humidity and temperature, weigh them after 12h, 24h, 48h and 72h, and calculate the hygroscopicity. The calculation formula for hygroscopicity is: hygroscopicity = (M 放置一段时间后的质量- M 初始质量 ) / M 初始质量 * 100. The results are shown in Table 11.

[0074] Table 11 Hygroscopicity test of particles

[0075] It can be seen from Table 11 above that Examples 1-3 with appropriate amounts of alcohol and adhesive can effectively reduce hygroscopicity. Compared with Comparative Example 3 in which the adhesive is dissolved in water, Comparative Examples 1-2 and 4-6 can reduce hygroscopicity by simply adding alcohol, indicating that alcohol has a significant improvement effect on reducing the hygroscopicity of particles.

[0076] Experimental Example 3 Follow the "Soluble Particle Test Method" in General Chapter 0104 of the Chinese Pharmacopoeia (2020 Edition). Take 10g of granules, add 200mL of hot water, stir, and measure the time required for all granules to dissolve. If there are granules that cannot be completely dissolved after 5 minutes, the granule solubility is unqualified. Filter the dissolved solution, dry the filter paper, and calculate the percentage of residue. The results are shown in Table 12.

[0077] Table 12 Determination of particle solubility

[0078] The results in Table 12 show that the dissolution time of Examples 1-3 is short, which can meet the purpose of instant dissolution that melts in the mouth.

[0079] Experimental Example 4 The prebiotic instant granules prepared in Examples 1-3 and Comparative Examples 1-8 were subjected to a blind sensory test, and the main sensory inspection items were post-alcohol taste, stickiness to teeth, viscosity, difficulty in swallowing, and sandy feeling. The sensory evaluation standards are shown in Table 13. A total of 20 people participated in the experiment, and the evaluation score of each sensory inspection item was 10 points at the highest and 0 points at the lowest. The lower the score, the better the index. The evaluation results are shown in Table 14.

[0080] Table 13 Sensory evaluation standards

[0081] Table 14 Sensory evaluation results

[0082] The results in Table 14 show that there are no problems with the sensory evaluation of Examples 1-3, but the taste of Comparative Examples 1-2 changes due to the alcohol concentration. The alcohol concentration of Comparative Example 1 is low, resulting in non-fluffy particles; the alcohol concentration of Comparative Example 2 is high, resulting in a strong alcohol taste and high viscosity of the particles; Comparative Example 3 does not use alcohol, and has high tooth stickiness, viscosity, difficulty in swallowing, and a sense of sand; Comparative Examples 4-5 have high tooth stickiness, viscosity, difficulty in swallowing, and a sense of sand due to too little and too much adhesive; the sensory evaluation of Comparative Example 6 is relatively low, but not better than Examples 1-3, indicating that there are certain differences in the senses of different components, and the formula set by the present invention is the best; Comparative Examples 7-8 have a lower alcohol recovery rate, so that more alcohol remains in the particles, so the alcohol taste is heavier.

[0083] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing prebiotic instant granules, characterized in that: The steps include: Weigh resistant dextrin, xylooligosaccharide and fructooligosaccharide, and mix with 45-65% by volume of alcohol to obtain an adhesive; Resistant dextrin, xylooligosaccharide and fructooligosaccharide are weighed to obtain a mixture, and 4-13% of a binder by weight of the mixture is added to prepare granules; the granules are dried to obtain prebiotic instant granules.

2. The preparation method according to claim 1, characterized in that In the preparation of the adhesive and the mixed material, the resistant dextrin is 75-85 parts by weight, the xylooligosaccharide is 10-20 parts by weight, and the fructooligosaccharide is 3-7 parts by weight.

3. The preparation method according to claim 2, characterized in that: The resistant dextrin is 77-83 parts by weight, the xylooligosaccharide is 12-18 parts by weight, and the fructo-oligosaccharide is 4-6 parts by weight.

4. The preparation method according to claim 1, characterized in that: The mass concentration of the adhesive is 35-45%.

5. The preparation method according to claim 1, characterized in that: The granules are prepared by spray drying.

6. The preparation method according to claim 5, characterized in that: The parameters of the spray drying granulation are set as follows: air inlet temperature 25-35°C, air inlet volume 18-38m 3 / h, liquid inlet speed 2.5-5.5ml / h, atomization pressure 0.08-0.58Mbar.

7. The preparation method according to claim 1, characterized in that: The drying adopts alcohol recovery vacuum drying.

8. The preparation method according to claim 7, characterized in that: The parameters of the alcohol recovery vacuum drying are set as: drying pressure -0.5~0.8MPa, drying temperature 35-62°C, and drying time 0.8-3.5h.

9. Prebiotic instant granules obtained by the preparation method according to any one of claims 1 to 8.

10. Use of the prebiotic instant granules obtained by the preparation method according to any one of claims 1 to 8 or the prebiotic instant granules according to claim 9 in preparing functional products.

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