A method for preparing and using a high-concentration alkyl glycoside solid powder

Abstract

The application belongs to the technical field of cosmetics, and discloses a preparation method and application of high-concentration alkyl glycoside solid powder, the composition comprising alkyl glycoside, anionic surfactant, inorganic carrier filler, and adhesion aid, wherein the adhesion aid is polyethylene glycol and gelatin. The application uses a process combining spray drying and a boiling bed, on the one hand, polyethylene glycol is used to avoid the sticking and wall sticking phenomenon of alkyl glycoside in the drying process, and improve the yield, on the other hand, the coating effect and film forming property of gelatin are used to granulate alkyl glycoside, so that the alkyl glycoside is not easy to absorb moisture and form lumps in the storage process, and is stable in the subsequent storage process. The high-concentration alkyl glycoside solid powder provided by the application has a high alkyl glycoside active substance content, effectively solves the problem that the traditional process product is easy to absorb moisture and form lumps, and is convenient for transportation and storage.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a method for preparing and applying a highly concentrated alkyl glycoside solid powder. Background Technology

[0002] Alkyl glycosides (APGs) are safe, green, and mild nonionic surfactants produced by the glycosylation reaction of natural raw materials fatty alcohols and glucose. However, most commercially available alkyl glycoside products are in liquid form, with an active ingredient content of approximately 40-70%. Currently, some detergent powders on the market contain alkyl glycosides, but the content is very low, approximately 2-5%. Patent EP90114360A utilizes an inert inorganic carrier to produce alkyl glycosides in powder form, and standardized products are already available on the market with an active ingredient content as high as 50%, but these are highly hygroscopic and prone to clumping, resulting in a short shelf life. Patent CN109422782A uses organic solvent extraction to remove fatty alcohol impurities, followed by vacuum drying to obtain pure alkyl glycoside solid powder. However, the process is complex and uses large amounts of organic solvents, posing a risk of residual solvents and generating significant amounts of waste, making this process unsuitable for large-scale production due to environmental and safety concerns. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a method for preparing and applying highly concentrated alkyl glycoside solid powder. This invention utilizes a combined spray drying and fluidized bed process. On one hand, polyethylene glycol is used to prevent alkyl glycosides from sticking to the walls during drying, improving yield. On the other hand, the coating and film-forming properties of gelatin are used to granulate the alkyl glycosides, making them less prone to moisture absorption and clumping during storage, thus maintaining stability during subsequent storage. The highly concentrated alkyl glycoside solid powder provided by this invention contains a high content of alkyl glycoside active ingredients, effectively solving the problem of moisture absorption and clumping in products from traditional processes, facilitating transportation and storage. The addition of binder not only does not affect foaming performance but also reduces the irritation caused by anionic surfactants and alkaline fillers, improving product safety.

[0004] To achieve the objectives of this invention, the invention includes the following technical solutions:

[0005] A highly concentrated alkyl glycoside solid powder, comprising the following components by weight percentage:

[0006] Alkyl glycosides 5-75%;

[0007] Anionic surfactants 1-10%;

[0008] 1-10% adhesive additive, wherein the adhesive additive comprises polyethylene glycol and gelatin;

[0009] The inorganic carrier filler is 10-50%, and the balance is anhydrous sodium sulfate.

[0010] Furthermore, in the above-mentioned highly concentrated alkyl glycoside solid powder, the fatty alcohol of the alkyl glycoside has a carbon number of C4-C18, preferably C8-C10 or C12-C14.

[0011] Furthermore, in the above-mentioned highly concentrated alkyl glycoside solid powder, the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium lauryl sulfate, sodium cocoyl sulfate, sodium laureth sulfate, sodium α-alkenyl sulfonate, sodium cocoyl hydroxyethyl sulfonate, sodium lauryl hydroxyethyl sulfonate, sodium lauroyl hydroxymethyl ethanesulfonate, and sodium cocoyl hydroxymethyl ethanesulfonate.

[0012] Furthermore, in the above-mentioned highly concentrated alkyl glycoside solid powder, the inorganic carrier filler includes anhydrous sodium sulfate and sodium silicate, wherein the amount of sodium silicate added is 5-15% and the modulus is 1-3.5.

[0013] Furthermore, in the above-mentioned highly concentrated alkyl glycoside solid powder, the polyethylene glycol has a molecular weight of PEG 2000-6000, and the gelatin has a gel strength of 100-250 Bloom g.

[0014] This invention also discloses a method for preparing the above-mentioned highly concentrated alkyl glycoside solid powder, comprising the following steps:

[0015] S1: Mix alkyl glycoside liquid, anionic surfactant, polyethylene glycol, inorganic carrier filler and deionized water, stir to dissolve, and prepare an aqueous solution with a solid content of 30-60%.

[0016] S2: Spray dry the aqueous solution obtained in S1 at an inlet air temperature of 140-190℃ and an atomizing motor frequency of 80-200Hz to obtain alkyl glycoside fine powder.

[0017] S3: The fine powder obtained in S2 is put into a fluidized bed dryer and granulator, and 10-15% gelatin aqueous solution is sprayed on it. Drying and granulation are carried out under the conditions of air inlet temperature of 60-90℃ and spray gun pressure of 0.1-0.3MPa.

[0018] S4: The granulated solids are sieved, and the particles that are too large are crushed and sieved again to obtain the highly concentrated alkyl glycoside solid powder.

[0019] Furthermore, in the above preparation method, the inlet air temperature of the spray dryer is 180°C, and the frequency of the atomizing motor is 100Hz.

[0020] Furthermore, in the above preparation method, the inlet air temperature of the fluidized bed granulation is 80°C, and the spray gun pressure is 0.15 MPa.

[0021] Furthermore, in the above preparation method, the concentration of the gelatin aqueous solution is 10%.

[0022] The present invention also discloses the application of the above-mentioned highly concentrated alkyl glycoside solid powder in cosmetics, household care products or industrial cleaning agents.

[0023] Compared with the prior art, the present invention has the following outstanding advantages:

[0024] (1) High molecular weight polyethylene glycol has the functions of binding, increasing particle flowability, and enhancing particle mechanical strength. Adding polyethylene glycol to the spray drying liquid can significantly reduce material adhesion and wall sticking during the process, avoid material loss and waste, and improve yield. Gelatin has good film-forming and coating properties. It can not only act as a binder to form larger particles of alkyl glycoside fine powder, but also block moisture and impurities from the outside of the particles, preventing the material from absorbing moisture and clumping. Using fluidized bed one-step drying granulation not only further reduces the moisture content of the material, but also realizes the granulation process, turning fine powder into larger solid particles, making it less prone to moisture absorption and clumping during storage, maintaining stability during subsequent storage, and facilitating transportation.

[0025] (2) The preparation method and application of the highly concentrated alkyl glycoside solid powder provided by the present invention are different from the commonly used alkyl glycoside detergent powder products on the market, and have a higher content of alkyl glycoside active ingredients.

[0026] (3) The high concentration alkyl glycoside solid powder provided by the present invention uses gelatin and polyethylene glycol as binders, which not only does not affect the foaming performance of the material itself, but also reduces the irritation caused by anionic surfactants and alkaline fillers, and improves the safety performance of the product. Attached Figure Description

[0027] Figure 1 Yields of various samples of highly concentrated alkyl glycoside solid powder;

[0028] Figure 2 Stability test results for Examples 1 and 4;

[0029] Figure 3 Stability test results for comparative examples 1, 3, 5, 7, and 8. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The term "high concentration" in this invention means that the content of alkyl glycoside active ingredient is preferably 30-50%.

[0032] The materials used in the embodiments of the present invention are shown in Table 1.

[0033] Table 1: Main experimental materials used and their sources

[0034]

[0035] Main experimental instruments used:

[0036] Constant temperature water bath, mixer, spray drying equipment, fluidized bed one-step drying and granulation equipment, etc.

[0037] Examples 1-6

[0038] The highly concentrated alkyl glycoside solid powder described in the following examples includes the following steps:

[0039] S1: According to the formula in Table 2, heat and stir all raw materials to dissolve them evenly, without large particles of insoluble substances. On a dry basis, the total solid content is 100%, and anhydrous sodium sulfate is used to make up the balance. On a wet basis, the solid content is controlled at 40%, and deionized water is used to make up the balance.

[0040] S2: The above aqueous solution is spray-dried in a high tower to produce alkyl glycoside fine powder, wherein the inlet air temperature is 180℃ and the atomizing motor frequency is 100Hz.

[0041] S3: The fine powder obtained by spray drying is fed into a fluidized bed dryer and granulator. A 10% gelatin aqueous solution is sprayed on the top of the tower, dried, and granulated to obtain alkyl glycoside solids. The inlet air temperature is 80℃ and the spray gun pressure is 0.15MPa.

[0042] S4: Pass the dried and granulated alkyl glycoside solids through an 80-mesh sieve. If the particle size is too large, crush it with a crusher and then re-sieve it before discharging.

[0043] In Examples 1-3, the alkyl glycoside fatty alcohols have a carbon number of C8-C10, and in Examples 4-6, the alkyl glycoside fatty alcohols have a carbon number of C12-C14.

[0044] Comparative Examples 1-8

[0045] The highly concentrated alkyl glycoside solid powders described in Comparative Examples 1-8 followed the same steps as in the Examples. When the amount of a certain component added was 0, the remaining amount was made up with anhydrous sodium sulfate. Comparative Examples 1-2 did not add gelatin, and the same amount of deionized water as in the Examples was used as a binder in the fluidized bed drying granulation process. Comparative Examples 3-4 did not add polyethylene glycol. Comparative Examples 5-6 did not add anionic surfactants. Comparative Examples 7-8 did not add sodium silicate.

[0046] Table 2: Formulation of Highly Concentrated Alkyl Glycoside Solid Powder (Dry Basis)

[0047]

[0048] The solid mass of the feed aqueous solution in step S1 is defined as M0, and the solid mass of the final output in step S4 is defined as M1. The yield of each sample is calculated according to Y = M1 / M0 × 100%, see [reference needed]. Figure 1 Examples 1-3 and Comparative Examples 1, 3, 5, and 7 are alkyl glycosides with carbon chain numbers of C8-C10, while Examples 4-6 and Comparative Examples 2, 4, 6, and 8 are alkyl glycosides with carbon chain numbers of C12-14. The overall yield of alkyl glycosides with carbon chain numbers of C8-C10 is higher than that of alkyl glycosides with carbon chain numbers of C12-14. This is because alkyl glycosides with higher carbon chain numbers have higher viscosity, are more prone to sticking to the wall and agglomerating, and have a higher loss rate. As the content of the active ingredient in the alkyl glycoside increases, the yield decreases slightly, indicating that the content of the active ingredient affects the degree of adhesion of the system, and thus affects the yield. Comparative Examples 1-2 do not contain gelatin, and compared with Examples 1 and 4, the yield is significantly lower, indicating that gelatin has certain film-forming and drying-aiding properties in the drying and granulation process, reducing adhesion. Comparative Examples 3-4 do not contain polyethylene glycol, and a large amount of material adhesion to the wall can be clearly observed in the spray drying stage, resulting in raw material waste. Compared with Examples 1 and 4, the yield is significantly lower. Comparative Examples 5-6, which do not contain solid anionic surfactants, showed a slight decrease in yield compared to Examples 1 and 4, indicating that solid anionic surfactants also have a certain promoting effect on the drying of materials. Comparative Examples 7-8, which do not contain the inorganic carrier filler sodium silicate, showed a significant amount of material adhering to the drying walls during the spray drying stage, resulting in raw material waste and a substantial decrease in yield compared to Examples 1 and 4.

[0049] Test Example 1:

[0050] Stability evaluation of highly concentrated alkyl glycoside solid powder.

[0051] The stability of highly concentrated alkyl glycoside solid powder was evaluated according to the methods in T / SHFCA 002-2021 "Guidelines for Stability Testing of Cosmetics".

[0052] 1. Test items and operating procedures

[0053] 1.1 Influencing Factors Experiment

[0054] 1.1.1 High Temperature Stability

[0055] Place the sample in a sealed, clean container and then in a constant temperature incubator pre-adjusted to (45℃±2℃) for 30 days. Take samples on days 5, 10, 20, and 30. After the test, return the sample to room temperature and observe its color, odor, and presence of clumps.

[0056] 1.1.2 Temperature stability

[0057] Place the sample in a sealed, clean container, then place it in a constant temperature incubator pre-adjusted to (45℃±2℃) for 24 hours. After 24 hours, remove the sample and place it in a refrigerator pre-adjusted to (-5℃±2℃) for 24 hours. Remove the sample again and place it in a constant temperature incubator at (40℃±2℃) for 24 hours. Repeat this cycle 5-7 times. After the test, return the sample to room temperature and observe its color, odor, and presence of clumps.

[0058] 1.2 Accelerated stability test

[0059] The samples were placed in a constant temperature and humidity chamber and tested for 6 months at 40℃±2℃ and 75%±5% relative humidity. At least 4 time points (e.g., 1, 2, 3, 6m) were measured, and the samples were compared with room temperature and 0m to observe the color, odor, and presence of caking.

[0060] 1.3 Long-term stability test

[0061] The samples were placed in a constant temperature and humidity chamber and tested for 24 months at a temperature of 25℃±2℃ and a relative humidity of 60%±10%. Samples were taken at 3, 6, 9, 12, 18 and 24 m, and compared with room temperature and 0 m to observe the color, odor and presence of caking.

[0062] 2. Experimental Results

[0063] The results of the stability evaluation test of the highly concentrated alkyl glycoside solid powder are shown in Table 3.

[0064] Table 3: Stability Evaluation Results of Highly Concentrated Alkyl Glycoside Solid Powder

[0065]

[0066] From Table 3 and Figure 2 The results show that no abnormalities occurred in any of the stability evaluation tests for Examples 1-6, indicating excellent storage stability. This demonstrates that the preparation method of the highly concentrated alkyl glycoside solid powder described in Examples 1-6 is effective and feasible. Gelatin, polyethylene glycol, and inorganic carrier fillers all help prevent the alkyl glycoside powder from absorbing moisture and clumping.

[0067] In contrast, proportions 1-4 and 7-8 both showed a large number of clumps, such as Figure 3As shown, the product cannot maintain its normal shelf life, exhibiting signs of deterioration such as clumping, dampness, and increased moisture content within two years, affecting its shelf life and stability. This indicates that the inorganic carrier fillers sodium silicate, gelatin, and polyethylene glycol play a crucial role in preventing moisture absorption. The film formed by gelatin on the particle surface blocks moisture from entering the product, ensuring its fluidity. Polyethylene glycol also plays a role in film formation and waterproofing within the solid particles. Sodium silicate, a commonly used inorganic carrier filler in solid detergents, not only maintains the alkaline environment of the detergent to ensure product effectiveness but also helps moisture-absorbing products block moisture from the air. Comparative Examples 5-6, lacking solid anionic surfactants and showing only trace amounts of clumping, indicate that anionic surfactants have a relatively small effect in preventing moisture absorption.

[0068] Test Example 2:

[0069] Skin irritation evaluation of highly concentrated alkyl glycoside solid powder.

[0070] This experimental example uses a closed patch test, referring to the closed patch test method provided in the "Cosmetic Safety Technical Specifications" to test the irritation of highly concentrated alkyl glycoside solid powder to human skin.

[0071] 1. Materials and Reagents

[0072] 1.1 Spot Tester

[0073] This experiment uses the international standard Finn-Chamber, made of aluminum, with a diameter of 7 mm and a sample dosage of 15 μl.

[0074] 1.2 Spot test substance and concentration

[0075] Sodium lauryl sulfate (SLS) is a classic skin irritation test substance. A 1% SLS aqueous solution is used as a positive control, and physiological saline or distilled water is used as a negative control.

[0076] 1.2 Subjects

[0077] A total of 30 healthy subjects were selected, including 15 females and 15 males, aged 20 to 48 years, with a mean age of (27.07±20.80) years. Subjects who had used glucocorticoids, nonsteroidal anti-inflammatory drugs, or antihistamines within the past 2 months were excluded. In addition, breastfeeding or pregnant women, those with skin diseases, sunburn, keloid scarring, excessive tattoos, or genetic allergies were also excluded. All subjects signed informed consent forms before the trial.

[0078] 2. Operating Method

[0079] 2.1 Spot Tester Operation Procedure

[0080] The flexor surface of the subject's upper arm was selected as the occlusive patch test site. The patch applicator was marked sequentially from top to bottom and left to right with a pencil. The coated paper on the patch applicator was removed, and the test sample solution (15 μL) was placed into the small aluminum chamber and spread evenly. The patch applicator, coated with the chemical reagent, was applied to the patient's skin, firmly and evenly from bottom to top, and gently pressed a few times with the palm to expel air. The patch applicator was removed after 24 hours. To avoid false impressions caused by pressure from the patch applicator, skin reactions were observed 30 minutes (after the pressure marks disappeared), 24 hours, and 48 hours after removal of the patch applicator, and the results were recorded.

[0081] 2.2 Results Evaluation Methods

[0082] Whether a test substance is an allergen is determined by the skin's reaction. A visual assessment is conducted on a scale of 0-4, with each score representing a different skin reaction. The meaning of each score for the skin reaction is as follows:

[0083] A score of 0 indicates a negative reaction (—), meaning it has no irritating effect on the skin;

[0084] A score of 1 indicates a suspicious reaction (±), with only slight erythema on the skin;

[0085] A score of 2 indicates a weak positive reaction (+, erythema reaction), with skin showing erythema, infiltration, edema, and possibly papules;

[0086] A score of 3 represents a strong positive reaction (++, herpes reaction), with the skin showing erythema, infiltration, edema, papules, and vesicles, and the reaction may extend beyond the test area;

[0087] A score of 4 represents an extremely strong positive reaction (+++, confluent herpes reaction), with obvious erythema, severe infiltration, edema, and confluent herpes on the skin, and the reaction extending beyond the test area.

[0088] 2.3 Spot test reagent samples

[0089] Examples 1-6 and Comparative Examples 1-8 were used as samples for patch testing, with three parallel samples set up for each sample;

[0090] 1% sodium dodecyl sulfate was used as a positive control.

[0091] Physiological saline or distilled water were used as negative controls.

[0092] 3. Experimental Results

[0093] The results of the skin irritation test of highly concentrated alkyl glycoside solid powder using a spot tester are shown in Table 4. All subjects had a positive control score of 4 and a negative control score of 0. The average score for each sample was calculated.

[0094] Table 4: Results of Skin Irritation Tests on Highly Concentrated Alkyl Glycoside Solid Powder

[0095]

[0096] The results above show that Examples 1-6, being alkaline and containing anionic surfactants, exhibited greater skin irritation. As the content of alkyl glycoside active ingredients increased, the skin irritation decreased slightly. Alkyl glycosides with carbon chain numbers of C12-C14 (Examples 4-6) showed less skin irritation than those with C8-C10 (Examples 1-3). Comparative Examples 1-2, lacking gelatin, showed reduced skin irritation, indicating that gelatin not only prevents the product from absorbing moisture and clumping but also alleviates skin irritation caused by surfactants, improving product safety. Similarly, polyethylene glycol also had a certain effect in reducing irritation, but not as significant as gelatin. Comparative Examples 5-6, lacking anionic surfactants, showed a significant reduction in skin irritation, indicating that the main source of irritation was anionic surfactants, while alkyl glycosides, being nonionic, had relatively low skin irritation. Comparative Examples 7-8 showed comparable skin irritation to the examples, indicating that sodium silicate did not have a significant impact on skin irritation in this system, only playing a role in stabilizing the pH.

[0097] Test Example 3:

[0098] Evaluation of the foaming properties of highly concentrated alkyl glycoside solid powder.

[0099] The foam performance of each embodiment and comparative example was tested according to the following steps.

[0100] Prepare a 1% aqueous solution for each sample. Take 20 ml of the sample solution into a 100 ml stoppered graduated cylinder and shake it manually up and down 10 times. Record the foam volume V0 (0 min) and V1 (5 min) respectively. Use the V0-V1 result to judge the foam stability. The results are shown in Table 5 below.

[0101] Table 5: Evaluation Results of Foam Performance of Highly Concentrated Alkyl Glycoside Solid Powder

[0102]

[0103] The results above show that Examples 1-6 exhibit good foaming performance and foam stability. According to Comparative Examples 1-2, the foam stability decreases slightly when gelatin is absent; gelatin not only does not affect foam performance in this system but also contributes to foam stability. According to Comparative Examples 3-4, polyethylene glycol has almost no effect on the foam stability of the system. According to Comparative Examples 5-6, the foaming performance is mainly provided by anionic surfactants; without anionic surfactants, the foaming performance is poor, but the foam stability is almost unaffected. According to Comparative Examples 7-8, the absence of sodium silicate slightly affects the pH stability of the system, slightly affecting the foaming performance, but has almost no effect on the foam stability.

[0104] Test Case Summary: The test cases show that the solid alkyl glycoside powder of the present invention (Examples 1-6) exhibits stability in high-temperature, variable-temperature, accelerated, and long-term stability tests, while the comparative examples without gelatin, polyethylene glycol, and sodium silicate show poor stability and significant clumping. Skin patch tests show that the solid alkyl glycoside powder of the present invention has some skin irritation. The addition of gelatin and polyethylene glycol not only stabilizes the product and increases yield but also reduces skin irritation and improves safety. Foam performance tests show that the solid alkyl glycoside powder of the present invention has good foaming properties and foam stability. Gelatin has a certain foam stabilizing effect, while polyethylene glycol has no effect on the foam performance of the system itself.

[0105] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A highly concentrated alkyl glycoside solid powder, characterized in that, It contains the following components by weight percentage: Alkyl glycosides 5-75%; Anionic surfactants 1-10%; 1-10% adhesive additive, wherein the adhesive additive comprises polyethylene glycol and gelatin; The inorganic carrier filler is 10-50%, and the balance is anhydrous sodium sulfate.

2. The highly concentrated alkyl glycoside solid powder according to claim 1, characterized in that, The alkyl glycoside has a fatty alcohol carbon number of C4-C18, preferably a C8-C10 or C12-C14 alkyl glycoside.

3. The highly concentrated alkyl glycoside solid powder according to claim 1, characterized in that, The anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium lauryl sulfate, sodium cocoyl sulfate, sodium laureth sulfate, sodium α-alkenyl sulfonate, sodium cocoyl hydroxyethyl sulfonate, sodium lauryl hydroxyethyl sulfonate, sodium lauroyl hydroxymethyl ethanesulfonate, and sodium cocoyl hydroxymethyl ethanesulfonate.

4. The highly concentrated alkyl glycoside solid powder according to claim 1, characterized in that, The inorganic carrier filler includes anhydrous sodium sulfate and sodium silicate, wherein the amount of sodium silicate added is 5-15% and the modulus is 1-3.

5.

5. The highly concentrated alkyl glycoside solid powder according to claim 1, characterized in that, The polyethylene glycol has a molecular weight of PEG 2000-6000, and the gelatin has a gel strength of 100-250 Bloom g.

6. The method for preparing highly concentrated alkyl glycoside solid powder according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Mix alkyl glycoside liquid, anionic surfactant, polyethylene glycol, inorganic carrier filler and deionized water, stir to dissolve, and prepare an aqueous solution with a solid content of 30-60%. S2: Spray dry the aqueous solution obtained in S1 at an inlet air temperature of 140-190℃ and an atomizing motor frequency of 80-200Hz to obtain alkyl glycoside fine powder. S3: The fine powder obtained in S2 is put into a fluidized bed dryer and granulator, and 10-15% gelatin aqueous solution is sprayed on it. Drying and granulation are carried out under the conditions of air inlet temperature of 60-90℃ and spray gun pressure of 0.1-0.3MPa. S4: The granulated solids are sieved, and the particles that are too large are crushed and sieved again to obtain the highly concentrated alkyl glycoside solid powder.

7. The preparation method according to claim 6, characterized in that, The inlet air temperature of the spray dryer is 180°C, and the frequency of the atomizing motor is 100Hz.

8. The preparation method according to claim 6, characterized in that, The inlet air temperature of the fluidized bed granulation is 80℃, and the spray gun pressure is 0.15MPa.

9. The preparation method according to claim 6, characterized in that, The concentration of the gelatin aqueous solution is 10%.

10. The use of the highly concentrated alkyl glycoside solid powder as described in any one of claims 1-5 in cosmetics, household care products or industrial cleaning agents.

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