Seaweed biological fertilizer water dispersible granule and preparation method thereof

Abstract

The invention discloses cytex biological fertilizer water dispersible granules. The cytex biological fertilizer water dispersible granules comprise 5-70% of an active component, 1-10% of a dispersing agent, 1-10% of a disintegrating agent, 1-10% of a stabilizer, 5-60% of a synergist and 1-50% of a carrier, through reasonable combination and balance of the dispersing agent, the disintegrating agent, the synergist, the stabilizer and the carrier, excellent automatic disintegration and self-dispersibility are formed, meanwhile, the water dispersible granule has excellent wettability, the surface tension and stability among various constituent phases of the water dispersible granule can be remarkably improved, a uniform and stable dispersion system is formed after the water dispersible granule is put into water, and the water dispersible granule has good stability. The permeation and absorption of the active ingredients at target positions are promoted, the surface tension on crops is reduced, the hydrophilicity or lipophilicity of the water dispersible granules is improved, the adhesive force and deposition on the crops are increased, the loss of the active ingredients on the surfaces of plants and leaves can be reduced, and the fertilizer efficiency and utilization rate of the active ingredients are improved; the dosage and the use frequency of the preparation are reduced.

Description

Technical Field

[0001] The invention belongs to the field of biofertilizer technology and biochemical technology, and in particular relates to a seaweed biofertilizer water-dispersible granule and a preparation method thereof. Background Art

[0002] Seaweed is a pure natural fertilizer extracted from marine plants, seaweed (algaes). It integrates the nutrients necessary for plants, marine biological active ingredients, and seaweed organic matter. It is used in agricultural production and mainly embodies the characteristics of high fertilizer efficiency and strong stress resistance. It has been made into water-based, powdered or wettable powders in the market. In practical applications, there are many problems such as poor quality stability and short shelf life. For example, water-based often precipitates, forms a bottom, changes color and deteriorates, and powders appear agglomeration, non-dispersion, and poor fertilizer efficiency. Therefore, it is necessary to try to make it into a water-dispersible granule dosage form to improve its technical content, improve its performance, and promote scientific and technological progress in the biofertilizer industry. There are many preparation methods for water-dispersible granules. One method is to mix the active ingredient with an adjuvant (dispersant, wetting agent, disintegrant, etc.) and a carrier, etc., and then grind it to meet the fineness requirements, and then add water or a binder for extrusion granulation and drying to obtain water-dispersible granules with automatic rapid disintegration and dispersion in water and a high suspension rate. When used in the field, it can be evenly mixed and dispersed with water in any proportion. It is easy to use and avoids dust. It has the advantages of powder, wettable powder and aqueous solution, and significantly reflects the many advantages of this dosage form such as high stability and long shelf life.

[0003] Seaweed is a plant without embryos, vascular bundles, and thallus spores. It has biological activity, so in the screening process of adjuvants and carriers, its biocompatibility and storage stability should be fully considered. Adjuvants play a decisive role in the formation and performance of water-dispersible granules. Water-dispersible granules are made by mixing, crushing and granulating active ingredients, adjuvants and carriers. In the granulation process, a suitable binder needs to be added. When placed in water, it needs the wetting of a wetting agent and the rapid disintegration of a disintegrant, and a dispersed system with a high suspension rate is formed by a dispersant. For the preparation of water-dispersible granules of biological fertilizers, it is necessary not only to screen high-performance special adjuvants and make them have good compatibility, but also to have good biocompatibility to prevent problems such as biodegradation and reduced storage stability. At present, the screening of biofertilizer adjuvants is mainly various additives that improve the physicochemical properties of the preparation, improve the biological control effect, and protect the biological control factors, such as dispersants, disintegrants, wetting agents, stabilizers, binders, synergists, etc.

[0004] Chinese invention patent 201310738911.X discloses a water-dispersible granule containing paraquat dichloride and its preparation method, which contains 10-65% by weight of paraquat dichloride expressed as paraquat cation content, 5-20% by weight of water, 0.1-5% by weight of moisturizer, and one or more additives selected from surfactants, adhesives, anti-caking agents, emetics, pigments, odorants and insoluble fillers. Its preparation method is to quantitatively dehydrate the paraquat mother liquor and evenly mix it with other components in a high-temperature molten liquid state to form a molten liquid or slurry material, and then perform melt spray cooling granulation or spray cooling granulation. The product quality and reliability of this solution are unknown.

[0005] Therefore, the present invention provides a seaweed biofertilizer water-dispersible granule and a preparation method thereof, which are used to increase the technical content of the water-dispersible granule dosage form and improve its use performance. Summary of the invention

[0006] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a seaweed bio-fertilizer water-dispersible granules and a preparation method to solve the problems of the existing aqueous solutions and powders, such as generally low technical content, unstable product quality, short shelf life, inconvenient use and lack of environmental protection.

[0007] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0008] A seaweed biofertilizer water-dispersible granule and a preparation method thereof. The water-dispersible granule comprises 5-70% of active ingredients, 1-10% of a dispersant, 1-10% of a disintegrant, 1-10% of a stabilizer, 5-60% of a synergist and 1-50% of a carrier.

[0009] It is further defined that the water-dispersible granules are cylindrical in shape, with a diameter of 0.5 to 1 mm, a length of 2 to 4 mm, an automatic disintegration time of ≤ 90 seconds when entering water, and a suspension rate ≥ 90%.

[0010] It is further defined that the dosage of each raw material component of the water-dispersible granules is 20-30% of active ingredient, 1-6.5% of dispersant, 1-8% of disintegrant, 1-6% of stabilizer, 5-60% of synergist and 10-40% of carrier, and the active ingredient is seaweed.

[0011] It is further defined that the active ingredient is 20% to 30% seaweed, the dispersant is one of the polycarboxylate dispersants Shanghai Pairun Technology PRTech-D8728 and Solvay GEROPON T / 36, the disintegrant is a naphthalenesulfonate dispersant, one of Shanghai Pairun Technology PRTech-D8636 and BASF Tamol NN 8906, the stabilizer is one of sodium citrate or sodium carboxymethyl starch, the synergist is one of potassium dihydrogen phosphate or ammonium sulfate, and the carrier is light calcium carbonate.

[0012] It is further defined that the water-dispersible granules contain 1 to 6% of dispersant, preferably 1.6 to 2.5% of dispersant.

[0013] It is further defined that the water dispersible granules contain 5% or 6% of a disintegrant.

[0014] It is further defined that the water dispersible granules contain 1 to 8% of stabilizer, preferably 6 to 6.5% of stabilizer.

[0015] It is further defined that the water dispersible granules contain 20-60% of synergist, preferably 40% or 60% of synergist.

[0016] It is further defined that the water-dispersible granules contain 1 to 30% of a carrier, preferably 5 to 30% of a carrier, and further optimized to 5 to 27% of a carrier.

[0017] A method for preparing a seaweed biofertilizer water-dispersible granule according to claims 1-9 comprises the following steps:

[0018] Step 1: Mix and stir the active ingredient, dispersant, disintegrant, synergist, stabilizer and carrier evenly;

[0019] Step 2: Add the raw materials stirred in step 1 to a jet mill for pulverization, add them to a kneader for mixing after the particle size reaches 10-15 um, and add a binder for kneading, wherein the binder is water;

[0020] Step 3: The kneaded raw materials in step 2 are conveyed to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the water-dispersible granules of the biological fertilizer.

[0021] Beneficial effects of the present invention:

[0022] 1. The fineness (intrinsic fineness) of the water-dispersible granules prepared by the present invention is between 10 and 15 μm, which expands the area of ​​the active ingredients spreading, depositing and adhering to the plant surface, and helps to penetrate through the plant tissue membrane, promote crop absorption, and thus improve the biofertilizer effect and utilization rate;

[0023] 2. The present invention forms excellent automatic disintegration and self-dispersion through the reasonable combination and balance of dispersants, disintegrants (also having the function of wetting agents), synergists, stabilizers and carriers, and has excellent wetting properties, which can significantly improve the surface tension and stability between various constituent phases of water-dispersible granules, form a uniform and stable dispersion system after entering water, promote the penetration and absorption of active ingredients at the target position, and increase the hydrophilicity or lipophilicity of water-dispersible granules by reducing the surface tension on crops, increase the adhesion and deposition amount on crops, and reduce the loss of active ingredients on the surface of plants and leaves, thereby improving the fertilizer efficiency and utilization rate of active ingredients and reducing the amount and frequency of use of the preparation.

[0024] 3. The preparation method of the present invention realizes the preparation of water-dispersible granules of biological fertilizer without significantly increasing the cost, thus adding a new dosage form to the biological fertilizer preparation. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the embodiments. The technical solution in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The invention discloses a seaweed biofertilizer water-dispersible granule, which comprises 5-70% of active ingredients, 1-10% of dispersant, 1-10% of disintegrant, 1-10% of stabilizer, 5-60% of synergist and 1-50% of carrier.

[0029] In the application of this embodiment, the water-dispersible granules are cylindrical in shape, with a diameter of 0.5-1 mm and a length of 2-4 mm. The automatic disintegration time after entering water is ≤ 90 seconds, and the suspension rate is ≥ 90%.

[0030] In the application of this embodiment, the dosage of each raw material component of the water-dispersible granules is 20-30% of active ingredient, 1-6.5% of dispersant, 1-8% of disintegrant, 1-6% of stabilizer, 5-60% of synergist and 10-40% of carrier, and the active ingredient is seaweed.

[0031] In the application of this embodiment, the active ingredient is 20% to 30% seaweed, the dispersant is a polycarboxylate dispersant, one of Shanghai Pairun Technology PRTech-D8728 and Solvay GEROPON T / 36, the disintegrant is a naphthalenesulfonate dispersant, one of Shanghai Pairun Technology PRTech-D8636 and BASF Tamol NN 8906 (also having a wetting function), the stabilizer is one of sodium citrate or sodium carboxymethyl starch, the synergist is one of potassium dihydrogen phosphate or ammonium sulfate, which are commercially available products, and the carrier is light calcium carbonate, which is a commercially available product.

[0032] In the application of this embodiment, the water-dispersible granules contain 1-6% of dispersant, preferably 1.6-2.5% of dispersant.

[0033] In the application of this embodiment, the water-dispersible granules contain 5% or 6% of disintegrant.

[0034] In the application of this embodiment, the water-dispersible granules contain 1 to 8% of stabilizer, preferably 6 to 6.5% of stabilizer.

[0035] In the application of this embodiment, the water-dispersible granules contain 20-60% of synergist, preferably 40% or 60% of synergist.

[0036] In the application of this embodiment, the water-dispersible granules contain 1 to 30% of the carrier, preferably 5 to 30% of the carrier, and further optimized to 5 to 27% of the carrier.

[0037] A method for preparing a seaweed biofertilizer water-dispersible granule comprises the following steps:

[0038] Step 1: Mix and stir the active ingredient, dispersant, disintegrant, synergist, stabilizer and carrier evenly;

[0039] Step 2: Add the raw materials stirred in step 1 to a jet mill for pulverization, add them to a kneader for mixing after the particle size reaches 10-15 um, and add a binder for kneading, wherein the binder is water;

[0040] Step 3: The kneaded raw materials in step 2 are conveyed to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the water-dispersible granules of the biological fertilizer.

[0041] In the present invention, through the reasonable combination and balance of dispersants, disintegrants (also having the function of wetting agents), synergists, stabilizers and carriers, excellent automatic disintegration and self-dispersion are formed, and at the same time, excellent wetting performance is possessed, which can significantly improve the surface tension and stability between various constituent phases of water-dispersible granules, form a uniform and stable dispersion system after entering water, promote the penetration and absorption of effective ingredients at target positions, and increase the hydrophilicity or lipophilicity of water-dispersible granules by reducing the surface tension on crops, thereby increasing the adhesion and deposition amount on crops, and reducing the loss of active ingredients on the surface of plants and leaves, thereby improving the fertilizer efficiency and utilization rate of active ingredients and reducing the usage amount and usage frequency of the preparation.

[0042] The technical solution provided by the present invention is described in detail below in conjunction with implementation examples, but it should not be understood as limiting the protection scope of the present invention.

[0043] Embodiment 1:

[0044] A 20% seaweed water-dispersible granule is prepared by mixing 20% ​​seaweed, 2% dispersant PRTech-D8728, 5% disintegrant PRTech-D8636, 6% stabilizer sodium citrate, 40% synergist potassium dihydrogen phosphate and 27% carrier light calcium carbonate, stirring the mixture evenly, adding the mixture to a jet mill for pulverization, adding the mixture to a kneader for mixing after the particle size reaches 10-15 μm, adding a proper amount of water for kneading, conveying the mixture to a rotary granulator for extrusion granulation, and finally drying the mixture in a fluidized bed dryer to obtain the biological fertilizer water-dispersible granule.

[0045] Embodiment 2:

[0046] The invention discloses a 20% seaweed water-dispersible granule. 20% seaweed, 1.6% dispersant PRTech-D8728, 6% disintegrant PRTech-D8636, 6.5% stabilizer sodium citrate, 60% synergist ammonium sulfate and 5.9% carrier light calcium carbonate are mixed and stirred evenly, added to a jet mill for pulverization, added to a kneader for mixing after the particle size reaches 10-15 μm, and kneaded with a proper amount of water, then transported to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the biological fertilizer water-dispersible granule.

[0047] Embodiment three:

[0048] The invention discloses a 30% seaweed water-dispersible granule. 30% seaweed, 2.5% dispersant PRTech-D8728, 6% disintegrant PRTech-D8636, 6% stabilizer sodium citrate, 40% synergist potassium dihydrogen phosphate and 15.5% carrier light calcium carbonate are mixed and stirred evenly, added to a jet mill for pulverization, added to a kneader for mixing after the particle size reaches 10-15 μm, and kneaded with an appropriate amount of water, and then transported to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the biological fertilizer water-dispersible granule.

[0049] Embodiment 4:

[0050] The invention discloses a 30% seaweed water dispersible granule. 30% seaweed, 2% dispersant PRTech-D8728, 6% disintegrant PRTech-D8636, 6% stabilizer sodium citrate, 50% synergist ammonium sulfate and 6% carrier light calcium carbonate are mixed and stirred evenly, added to a jet mill for pulverization, added to a kneader for mixing after the particle size reaches 10-15um, and a proper amount of water is added for kneading, then transported to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the biological fertilizer water dispersible granule.

[0051] Test example: Testing of relevant technical indicators of water-dispersible granules containing seaweed.

[0052] The water-dispersible granules containing seaweed extract in Examples 1 to 4 were tested for the suspension rate in normal storage, the suspension rate in hot storage, the disintegration time at room temperature and the disintegration time after hot storage. The results are shown in Table 1.

[0053]

[0054] Table 1 Test results of water dispersible granules in different embodiments

[0055] As can be seen from Table 1, the water-dispersible granules of Examples 1 to 4 of the present invention have reliable quality and are all better than the set technical index range.

[0056] In addition, the nanosuspension of Examples 1-4 was placed at room temperature for 14 days and stored at 54°C for 14 days, respectively, and the suspension rate was tested with reference to Method 1 in GB / T14825-2006 Pesticide Suspension Rate Determination Method. The suspension rate of the water-dispersible granules in each example was higher than 90%, meeting the relevant requirements for suspension agents.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A seaweed biofertilizer water dispersible granule, characterized in that: The water-dispersible granules contain 5-70% of active ingredients, 1-10% of dispersants, 1-10% of disintegrants, 1-10% of stabilizers, 5-60% of synergists and 1-50% of carriers.

2. The algae biofertilizer water dispersible granules according to claim 1, characterized in that: The water-dispersible granules are cylindrical in shape, with a diameter of 0.5 to 1 mm and a length of 2 to 4 mm. The automatic disintegration time after entering water is ≤ 90 seconds, and the suspension rate is ≥ 90%.

3. The algae biofertilizer water dispersible granules according to claim 1, characterized in that: The dosage of each raw material component of the water-dispersible granule is 20-30% of active ingredient, 1-6.5% of dispersant, 1-8% of disintegrant, 1-6% of stabilizer, 5-60% of synergist and 10-40% of carrier, and the active ingredient is seaweed.

4. A seaweed biofertilizer water dispersible granule and preparation method according to claim 1 or 3, characterized in that: The active ingredient is 20% to 30% of seaweed, the dispersant is one of the polycarboxylate dispersants Shanghai Pairun Technology PRTech-D8728 and Solvay GEROPON T / 36, the disintegrant is a naphthalenesulfonate dispersant, one of Shanghai Pairun Technology PRTech-D8636 and BASF Tamol NN 8906, the stabilizer is one of sodium citrate or sodium carboxymethyl starch, the synergist is one of potassium dihydrogen phosphate or ammonium sulfate, and the carrier is light calcium carbonate.

5. The seaweed biofertilizer water dispersible granules according to claim 1 or 3, characterized in that: The water-dispersible granules contain 1 to 6% of a dispersant, preferably 1.6 to 2.5% of a dispersant.

6. The seaweed biofertilizer water dispersible granules according to claim 1 or 3, characterized in that: The water dispersible granules contain 5% or 6% of a disintegrant.

7. The seaweed biofertilizer water dispersible granules according to claim 1, characterized in that: The water-dispersible granules contain 1 to 8% of stabilizer, preferably 6 to 6.5% of stabilizer.

8. The seaweed biofertilizer water dispersible granules according to claim 1 or 3, characterized in that: The water dispersible granules contain 20-60% of synergist, preferably 40% or 60% of synergist.

9. The seaweed biofertilizer water dispersible granules according to claim 1 or 3, characterized in that: The water-dispersible granules contain 1 to 30% of the carrier, preferably 5 to 30% of the carrier, and further optimized to 5 to 27% of the carrier.

10. A method for preparing a seaweed biofertilizer water dispersible granule according to claims 1-9, characterized in that: The steps include: Step 1: Mix and stir the active ingredient, dispersant, disintegrant, synergist, stabilizer and carrier evenly; Step 2: Add the raw materials stirred in step 1 to a jet mill for pulverization, add them to a kneader for mixing after the particle size reaches 10-15 um, and add a binder for kneading, wherein the binder is water; Step 3: The kneaded raw materials in step 2 are conveyed to a rotary granulator for extrusion granulation, and finally dried in a fluidized bed dryer to obtain the water-dispersible granules of the biological fertilizer.

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