Activators, monoammonium phosphate, their preparation methods and applications

Abstract

This invention proposes an activator, monoammonium phosphate, its preparation method, and its application. The activator includes a solubilizer, an organic acid, an active agent, an anti-precipitant, and an adjuvant; wherein the solubilizer includes at least one of hydroxypropyl-β-cyclodextrin and sulfonyl-β-cyclodextrin. Therefore, the activator of this invention can effectively activate phosphorus in monoammonium phosphate, reduce its water-insoluble matter, improve its water solubility, and reduce its fixation in soil. It can be widely applied to irrigation of saline-alkali land, improving agricultural efficiency and saving resources.

Description

Technical Field

[0001] This invention relates to the field of fertilizer technology, specifically to an activator, monoammonium phosphate, its preparation method, and its application. Background Technology

[0002] Monoammonium phosphate (MAP) is a commonly used agricultural input, belonging to the binary nitrogen and phosphorus fertilizer family, and plays a crucial role in the production of food and cash crops. Although my country has abundant phosphate rock resources, low- to medium-grade phosphate rock accounts for 90%. Producing high-concentration industrial MAP is not conducive to the sustainable development of phosphate rock resources. However, the production process of agricultural MAP produces too many impurities, especially in large areas of saline-alkali land in Xinjiang where water and fertilizer integration is not feasible to meet drip irrigation requirements. In addition, phosphorus is easily fixed in the soil and has poor mobility, resulting in low phosphorus utilization rate, poor crop performance, resource waste, and environmental pollution.

[0003] Therefore, there is an urgent need to develop a monoammonium phosphate with high water solubility and phosphorus utilization rate. Summary of the Invention

[0004] This invention aims to at least partially solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an activator, monoammonium phosphate, its preparation method, and its application. The activator of this invention can activate the phosphorus in monoammonium phosphate, improve the water solubility of monoammonium phosphate, increase the content of water-soluble phosphorus, reduce its water-insoluble matter, reduce its fixation in the soil, and promote high-quality crop growth and increased yield.

[0005] In a first aspect, the present invention provides an activator. According to embodiments of the present invention, the activator comprises: a solubilizer, an organic acid, an active agent, an anti-precipitant, and an adjuvant; wherein the solubilizer comprises at least one of hydroxypropyl-β-cyclodextrin (HP-β-CD) and sulfobutyl-β-cyclodextrin (SBE-β-CD).

[0006] According to embodiments of the present invention, the inventors, through extensive experiments, discovered that using at least one of hydroxypropyl-β-cyclodextrin and sulfobutyl-β-cyclodextrin as a co-solvent, along with the combined use of organic acids, surfactants, anti-precipitants, and adjuvants, can effectively activate phosphorus in monoammonium phosphate, reduce its water-insoluble matter, improve its water solubility, and reduce its fixation in the soil. This can be applied on a large scale for irrigation of saline-alkali land, improving agricultural efficiency and saving resources.

[0007] According to embodiments of the present invention, the activator may further include at least one of the following additional technical features:

[0008] According to an embodiment of the present invention, the activator comprises: 25-35 parts by weight of a solubilizer; 27-30 parts by weight of an organic acid; 23-25 ​​parts by weight of an activator; 8-10 parts by weight of an anti-precipitant; and 7-10 parts by weight of an adjuvant.

[0009] According to embodiments of the present invention, the organic acid includes at least one of citric acid, malic acid, tartaric acid, oxalic acid, and succinic acid.

[0010] According to embodiments of the present invention, the active agent comprises a soluble fluoride salt.

[0011] According to embodiments of the present invention, the soluble fluoride salt includes at least one of hydrofluoric acid, ammonium fluoride, fluorosilicic acid, and sodium fluoride.

[0012] According to embodiments of the present invention, the anti-precipitant includes at least one of polyepoxysuccinic acid, phosphonic acid, benzotriazole, sulfonated lignin, polyacrylic acid, hydrolyzed polymaleic anhydride, and acrylate-ethyl acrylate-itaconic acid copolymer.

[0013] According to embodiments of the present invention, the additives include at least one of sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium lignosulfonate, sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, benzylphenol polyoxyethylene ether, and phenethylphenol polyoxyethylene ether.

[0014] In a second aspect, the present invention provides a monoammonium phosphate. According to an embodiment of the present invention, the monoammonium phosphate comprises: the activator described in the first aspect and a monoammonium phosphate raw material. As previously mentioned, the activator of the present invention can improve the water solubility of monoammonium phosphate and activate the phosphorus in monoammonium phosphate. Therefore, the monoammonium phosphate of the present invention has excellent water solubility and a high content of water-soluble phosphorus (P2O5), which can improve the utilization efficiency of phosphorus. This improvement not only enhances the fertilizer effect of monoammonium phosphate but also promotes high-quality crop growth and increased yield, and can be widely applied to drip irrigation in saline-alkali land.

[0015] According to embodiments of the present invention, the monoammonium phosphate may further include at least one of the following additional technical features:

[0016] According to an embodiment of the present invention, the monoammonium phosphate further includes a synergist.

[0017] According to an embodiment of the present invention, the monoammonium phosphate comprises: 85-95 parts by weight of monoammonium phosphate raw material; 3-10 parts by weight of synergist; and 2-5 parts by weight of activator.

[0018] According to embodiments of the present invention, the synergist includes at least one of alginate, polyglutamic acid, γ-aminobutyric acid, glycine, serine, and boron.

[0019] According to an embodiment of the present invention, the synergist comprises 30-45 parts by weight of alginic acid, 20-25 parts by weight of polyglutamic acid, 20-25 parts by weight of γ-aminobutyric acid, 5-7 parts by weight of glycine, 5-7 parts by weight of serine, and 5-6 parts by weight of boron.

[0020] According to an embodiment of the present invention, the boron element is derived from at least one of sodium tetraborate decahydrate, sodium octaborate tetrahydrate, and boric acid.

[0021] In a third aspect, the present invention provides a method for preparing the monoammonium phosphate described in the second aspect. According to an embodiment of the present invention, the method includes: subjecting the activator described in the first aspect to a first mixing treatment with monoammonium phosphate raw material to obtain a first mixed treatment product; subjecting the first mixed treatment product to a neutralization reaction with ammonia to obtain a slurry; and subjecting the slurry to the synergist in a second mixing treatment to obtain the monoammonium phosphate. Thus, the monoammonium phosphate prepared by the method of the present invention can reduce phosphorus fixation, improve the utilization efficiency of phosphorus in monoammonium phosphate, and thereby enhance the effectiveness of phosphate fertilizer.

[0022] In a fourth aspect of the invention, the invention proposes the application of the activator described in the first aspect, the monoammonium phosphate described in the second aspect, or the monoammonium phosphate prepared by the method described in the third aspect in the cultivation of crops or the increase of crop yield.

[0023] In a fifth aspect, the present invention provides a method for increasing the water-soluble phosphorus content of monoammonium phosphate. According to embodiments of the present invention, the method includes: adding the activator described in the first aspect during the preparation of the monoammonium phosphate, or using the monoammonium phosphate described in the second aspect, or the monoammonium phosphate prepared by the method described in the third aspect.

[0024] In a sixth aspect, the present invention provides a method for increasing crop yield and promoting crop growth. According to an embodiment of the invention, the method includes applying monoammonium phosphate as described in the second aspect or monoammonium phosphate prepared by the method described in the third aspect to the crop.

[0025] According to embodiments of the present invention, the crop includes at least one of cotton, Arabidopsis thaliana, rice, corn, wheat, sorghum, barley, oats, rye, soybean, tobacco, rapeseed, and tomato.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0030] In this document, the terms “comprising” or “including” are open-ended expressions, meaning that they include the contents specified in this invention, but do not exclude other aspects.

[0031] In this document, the terms “optionally,” “optionally,” or “optionally” generally refer to an event or condition that may, but may not, occur, and the description includes both cases in which the event or condition occurs and cases in which the event or condition does not occur.

[0032] Currently, monoammonium phosphate (MAP), a commonly used nitrogen-phosphorus binary fertilizer in agricultural production, suffers from less than ideal phosphorus utilization. Traditional solutions involve adding synergists to MAP to activate phosphorus and enhance its mobility in the soil. However, due to limitations in the types of synergists available and shortcomings in existing technology, these methods are not very effective and have failed to significantly improve the water solubility and other physical properties of MAP. In regions like Xinjiang, the widespread application of drip irrigation technology places even higher demands on the water solubility of MAP.

[0033] In view of this, the present invention proposes an activator designed to improve the activity and mobility of phosphorus, thereby significantly enhancing phosphorus utilization. This activator innovatively incorporates at least one of hydroxypropyl-β-cyclodextrin and sulfobutyl-β-cyclodextrin, which not only improves the water solubility of monoammonium phosphate but also enhances its applicability under various soil conditions, especially saline-alkali land, meeting the needs of drip irrigation technology. The activator, monoammonium phosphate, its preparation method, and its applications will be described in detail below.

[0034] Activator

[0035] This invention proposes an activator. According to embodiments of the invention, the activator comprises: a solubilizer, an organic acid, an activator, an anti-precipitant, and an adjuvant; wherein the solubilizer comprises at least one of hydroxypropyl-β-cyclodextrin (HP-β-CD) and sulfobutyl-β-cyclodextrin (SBE-β-CD). According to embodiments of the invention, the inventors, through extensive experimentation, discovered that by using hydroxypropyl-β-cyclodextrin or sulfobutyl-β-cyclodextrin as a solubilizer in synergistic use with an organic acid, activator, anti-precipitant, and adjuvant, the activity of phosphorus in monoammonium phosphate can be enhanced. This combination not only reduces the water-insoluble content of monoammonium phosphate but also improves its water solubility, thereby reducing the phosphorus fixation rate in the soil. These improvements directly promote high-quality crop growth and increase crop yield. Furthermore, the activator of this invention can be widely applied to irrigation of saline-alkali land, which not only improves agricultural efficiency but also contributes to resource conservation and sustainable utilization.

[0036] In some embodiments of the present invention, the activator comprises: 25-35 parts by weight of a solubilizer; 27-30 parts by weight of an organic acid; 23-25 ​​parts by weight of an activator; 8-10 parts by weight of an anti-precipitant; and 7-10 parts by weight of an adjuvant. This effectively enhances the activity of phosphorus in monoammonium phosphate, reduces the water-insoluble content of monoammonium phosphate, improves its water solubility, and thus reduces the fixation rate of phosphorus in the soil.

[0037] For example, the weight parts of the solvent can be 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, etc., or can be a range of any of the above values.

[0038] For example, the organic acid may be in parts by weight of 27, 28, 29, 30, etc., or may be a range of any of the above values.

[0039] For example, the active agent may be in parts by weight of 23, 24, 25, etc., or may be a range of any of the above values.

[0040] For example, the anti-precipitation agent may be in parts by weight of 8, 9, 10, etc., or may be a range of any of the above values.

[0041] For example, the weight parts of the adjuvant can be 7, 8, 9, 10, etc., or can be a range of any of the above values.

[0042] In some embodiments of the present invention, the organic acid includes at least one of citric acid, malic acid, tartaric acid, oxalic acid, and succinic acid.

[0043] In some embodiments of the present invention, the activator comprises a soluble fluoride salt. According to embodiments of the present invention, the soluble fluoride salt comprises at least one of hydrofluoric acid, ammonium fluoride, fluorosilicic acid, and sodium fluoride.

[0044] In some embodiments of the present invention, the anti-precipitant includes at least one of polyepoxysuccinic acid, phosphonic acid, benzotriazole, sulfonated lignin, polyacrylic acid, hydrolyzed polymaleic anhydride, and acrylate-ethyl acrylate-itaconic acid copolymer.

[0045] In some embodiments of the present invention, the adjuvant includes at least one of sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium lignosulfonate, sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, benzylphenol polyoxyethylene ether, and phenethylphenol polyoxyethylene ether.

[0046] Monoammonium phosphate and its preparation method

[0047] This invention provides a monoammonium phosphate (MAP). According to embodiments of the invention, the MAP comprises the aforementioned activator and MAP raw material. As previously described, the activator of this invention enhances the water solubility of the MAP and activates the phosphorus in it. Therefore, the MAP of this invention exhibits excellent water solubility and a high content of water-soluble phosphorus (P₂O₅), thereby improving phosphorus utilization efficiency. This improvement not only enhances the fertilizer effect of the MAP but also promotes high-quality crop growth and increased yield, making it suitable for large-scale application in drip irrigation of saline-alkali land. Those skilled in the art will understand that the features and advantages described above regarding the activator also apply to this MAP, and will not be repeated here.

[0048] In some embodiments of the present invention, the monoammonium phosphate further includes a synergist. Therefore, the synergist of the present invention can further promote root development and aboveground growth of crops, thereby increasing crop yield.

[0049] In some embodiments of the present invention, the monoammonium phosphate comprises: 85-95 parts by weight of monoammonium phosphate raw material; 3-10 parts by weight of synergist; and 2-5 parts by weight of activator. Therefore, the monoammonium phosphate of the present invention has excellent product properties and fertilizer efficacy. The activator it contains can activate the phosphorus in the monoammonium phosphate, reduce its water-insoluble matter, improve water solubility, and reduce its fixation in the soil. The synergist can promote crop growth and increase crop yield. Simultaneously, the monoammonium phosphate in the present invention has excellent product properties and effects, with reduced precipitation in hard water, and can be widely applied to drip irrigation in saline-alkali land, showing great application prospects and value.

[0050] For example, the weight parts of the monoammonium phosphate raw material can be 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, etc., or can be any range of the above values.

[0051] For example, the weight parts of the synergist may be 3, 4, 5, 6, 7, 8, 9, 10, etc., or may be a range of any of the above values.

[0052] For example, the activator may be in parts by weight of 2, 3, 4, 5, etc., or may be a range of any of the above values.

[0053] It should be noted that the monoammonium phosphate raw material described in this invention is widely used in agricultural production to supplement crops with nitrogen and phosphorus elements. It can be derived from phosphoric acid, phosphate rock, etc., or can be obtained by purchasing the monoammonium phosphate raw material. When the monoammonium phosphate raw material of this invention is derived from phosphoric acid, the concentration of phosphoric acid is ≥45%.

[0054] In some embodiments of the present invention, the synergist includes at least one of alginic acid, polyglutamic acid, γ-aminobutyric acid (GABA), glycine, serine, and boron. Alginic acid, polyglutamic acid, and GABA work synergistically to promote crop root growth and development, improve rooting and seedling emergence in saline-alkali soil, activate phosphorus, and reduce phosphorus fixation in the soil. Simultaneously, the presence of glycine, serine, and trace elements promotes root cell differentiation and enhances photosynthetic capacity, while also providing trace elements for plant growth. Therefore, this combination of synergists can promote crop root development and aboveground growth.

[0055] In some embodiments of the present invention, the synergist comprises 30-45 parts by weight of alginic acid, 20-25 parts by weight of polyglutamic acid, 20-25 parts by weight of γ-aminobutyric acid, 5-7 parts by weight of glycine, 5-7 parts by weight of serine, and 5-6 parts by weight of boron. This further activates phosphorus in the soil, reduces its water-insoluble content, increases its water solubility, reduces phosphorus fixation in the soil, enhances its mobility, thereby promoting crop root growth and development, enhancing nutrient absorption capacity, and increasing crop yield.

[0056] For example, the weight parts of the alginic acid can be 30, 32, 35, 37, 40, 42, 45, etc., or can be a range of any of the above values.

[0057] For example, the polyglutamic acid may be in the following weight proportions: 20, 21, 22, 23, 24, 25, etc., or may be a range of any of the above values.

[0058] For example, the weight parts of the γ-aminobutyric acid can be 20, 21, 22, 23, 24, 25, etc., or can be a range of any of the above values.

[0059] For example, the glycine may be in parts by weight of 5, 6, 7, etc., or may be a range of any of the above values.

[0060] For example, the serine may be in parts by weight of 5, 6, 7, etc., or may be a range of any of the above values.

[0061] For example, the weight parts of boron can be 5, 5.5, 6, etc., or can be any of the above-mentioned values.

[0062] In some embodiments of the present invention, the boron element is derived from at least one of sodium tetraborate decahydrate, sodium octaborate tetrahydrate, and boric acid.

[0063] This invention proposes a method for preparing monoammonium phosphate. According to an embodiment of the invention, the method includes: subjecting the aforementioned activator to a first mixing treatment with monoammonium phosphate raw material to obtain a first mixed treatment product; neutralizing the first mixed treatment product with ammonia to obtain a slurry; and subjecting the slurry to a second mixing treatment with the synergist to obtain the monoammonium phosphate. Thus, the monoammonium phosphate prepared by the method of this invention not only reduces phosphorus fixation and improves the utilization efficiency of phosphorus in monoammonium phosphate, but also enhances the rooting and seedling emergence ability of crops in saline-alkali soil, promoting crop growth while saving resources. Those skilled in the art will understand that the features and advantages described above for the monoammonium phosphate also apply to this method for preparing monoammonium phosphate, and will not be repeated here.

[0064] application

[0065] This invention proposes the application of the aforementioned activator, the aforementioned monoammonium phosphate, or the monoammonium phosphate prepared by the aforementioned method in crop cultivation or increasing crop yield. As previously stated, the activator of this invention can enhance the activity of phosphorus in monoammonium phosphate, reduce its water-insoluble matter, improve its water solubility, and reduce its fixation in the soil, thereby promoting crop growth and increasing crop yield. Those skilled in the art will understand that the features and advantages described above for the activator and monoammonium phosphate are also applicable to this application, and will not be repeated here.

[0066] In some embodiments of the present invention, the crop includes at least one of cotton, Arabidopsis thaliana, rice, corn, wheat, sorghum, barley, oats, rye, soybean, tobacco, rapeseed, and tomato.

[0067] This invention proposes a method for increasing the water-soluble phosphorus content of monoammonium phosphate. According to embodiments of the invention, the method includes: adding the aforementioned activator during the preparation of the monoammonium phosphate, or using the aforementioned monoammonium phosphate, or monoammonium phosphate prepared by the aforementioned method. As previously mentioned, the activator of this invention can enhance the activity of phosphorus in monoammonium phosphate, reduce its water-insoluble matter, increase water solubility, reduce its fixation in the soil, and increase the content of water-soluble phosphorus. Therefore, the method of this invention can increase the content of water-soluble phosphorus in monoammonium phosphate. Those skilled in the art will understand that the features and advantages described above regarding the activator and monoammonium phosphate are also applicable to this method, and will not be repeated here.

[0068] This invention proposes a method for increasing crop yield and promoting crop growth. According to an embodiment of the invention, the method includes applying the aforementioned monoammonium phosphate or monoammonium phosphate prepared by the aforementioned method to the crop. As previously mentioned, the monoammonium phosphate of this invention has excellent water solubility and a high content of water-soluble phosphorus (P2O5), which can improve the utilization efficiency of phosphorus. Therefore, the monoammonium phosphate of this invention has a strong fertilizer effect, can promote crop growth, and increase crop yield. Those skilled in the art will understand that the features and advantages described above for the monoammonium phosphate also apply to this method, and will not be repeated here.

[0069] In some embodiments of the present invention, the crop includes at least one of cotton, Arabidopsis thaliana, rice, corn, wheat, sorghum, barley, oats, rye, soybean, tobacco, rapeseed, and tomato.

[0070] The present invention will be explained below with reference to embodiments. Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0071] Example 1

[0072] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0073] Preparation of synergist: Based on 100 parts by weight of synergist, 30 parts by weight of alginic acid, 25 parts by weight of polyglutamic acid, 25 parts by weight of γ-aminobutyric acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0074] Add 10 parts by weight of synergist and 5 parts by weight of activator to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain synergistic water-soluble monoammonium phosphate 1.

[0075] Enhanced water-soluble monoammonium phosphate is prepared by the following method:

[0076] (1) Add the activator to the phosphoric acid raw material to obtain modified phosphoric acid.

[0077] (2) The modified phosphoric acid is neutralized with liquid ammonia to a degree of neutralization of about 1.1 to obtain ammonium phosphate slurry.

[0078] (3) Add the synergist to the ammonium phosphate slurry to obtain an ammonium phosphate slurry containing the synergist carrier.

[0079] (4) The ammonium phosphate slurry is spray-dried to obtain powdered enhanced water-soluble monoammonium phosphate 1 finished product.

[0080] Example 2

[0081] Preparation of activator: Based on 100 parts by weight of activator, 35 parts by weight of hydroxypropyl-β-cyclodextrin, 27 parts by weight of citric acid, 23 parts by weight of hydrofluoric acid, 8 parts by weight of phosphonic acid, and 7 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0082] Preparation of synergist: Based on 100 parts by weight of synergist, 45 parts by weight of alginic acid, 20 parts by weight of polyglutamic acid, 20 parts by weight of γ-aminobutyric acid, 5 parts by weight of glycine, 5 parts by weight of serine, and 5 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0083] Add 10 parts by weight of synergist and 5 parts by weight of activator to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain synergistic water-soluble monoammonium phosphate 2.

[0084] Enhanced water-soluble monoammonium phosphate 2 was prepared according to the production process of enhanced water-soluble monoammonium phosphate 1 in Example 1.

[0085] Example 3

[0086] Activator preparation: Based on 100 parts by weight of activator, 33 parts by weight of sulfonyl-β-cyclodextrin, 28 parts by weight of malic acid, 24 parts by weight of sodium fluoride, 8 parts by weight of polyacrylic acid, and 7 parts by weight of sodium lignosulfonate were mixed evenly to obtain the activator.

[0087] Preparation of synergist: Based on 100 parts by weight of synergist, 35 parts by weight of alginic acid, 23 parts by weight of polyglutamic acid, 22 parts by weight of γ-aminobutyric acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0088] Add 3 parts by weight of synergist and 2 parts by weight of activator to 158 parts by weight of 45% phosphoric acid (equivalent to 95 parts of monoammonium phosphate) to obtain synergistic water-soluble monoammonium phosphate 3.

[0089] Enhanced water-soluble monoammonium phosphate 3 was prepared according to the production process of enhanced water-soluble monoammonium phosphate 1 in Example 1.

[0090] Example 4

[0091] Preparation of activator: Based on 100 parts by weight of activator, 30 parts by weight of sulfonyl-β-cyclodextrin, 29 parts by weight of tartaric acid, 24 parts by weight of ammonium fluoride, 9 parts by weight of sulfonated lignin, and 8 parts by weight of sodium dodecyl sulfate are mixed evenly to obtain the activator.

[0092] Preparation of synergist: Based on 100 parts by weight of synergist, 43 parts by weight of alginic acid, 21 parts by weight of polyglutamic acid, 21 parts by weight of γ-aminobutyric acid, 5 parts by weight of glycine, 5 parts by weight of serine, and 5 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0093] Add 6 parts by weight of synergist and 4 parts by weight of activator to 150 parts by weight of 45% phosphoric acid (equivalent to 90 parts of monoammonium phosphate) to obtain synergistic water-soluble monoammonium phosphate 4.

[0094] Enhanced water-soluble monoammonium phosphate 4 was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1.

[0095] Comparative Example 1

[0096] Ordinary monoammonium phosphate was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1, without synergists or activators.

[0097] Comparative Example 2

[0098] Monoammonium phosphate without activator was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific components are as follows:

[0099] Preparation of synergist: Based on 100 parts by weight of synergist, 30 parts by weight of alginic acid, 25 parts by weight of polyglutamic acid, 25 parts by weight of γ-aminobutyric acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0100] Ten parts by weight of synergist were added to 150 parts by weight of 45% phosphoric acid (equivalent to 90 parts of monoammonium phosphate) to obtain monoammonium phosphate without activator.

[0101] Comparative Example 3

[0102] Monoammonium phosphate without synergist was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific composition is as follows:

[0103] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0104] Five parts by weight of activator were added to 158 parts by weight of 45% phosphoric acid (equivalent to 95 parts of monoammonium phosphate) to obtain monoammonium phosphate without synergist.

[0105] Comparative Example 4

[0106] The monoammonium phosphate with a replaced synergist component was prepared according to the production process of the enhanced water-soluble monoammonium phosphate in Example 1. The specific composition is as follows:

[0107] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0108] Preparation of synergist: Based on 100 parts by weight of synergist, 30 parts by weight of alginic acid, 25 parts by weight of polyacrylamide, 25 parts by weight of chitosan, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0109] 10 parts by weight of synergist and 5 parts by weight of activator were added to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain monoammonium phosphate with the synergist component replaced.

[0110] Comparative Example 5

[0111] The monoammonium phosphate with a replaced activator component was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific composition is as follows:

[0112] Activator preparation: Based on 100 parts by weight of activator, 33 parts by weight of polyaspartic acid, 28 parts by weight of malic acid, 24 parts by weight of sodium fluoride, 8 parts by weight of polyacrylic acid, and 7 parts by weight of sodium lignosulfonate are mixed evenly to obtain the activator.

[0113] Preparation of synergist: Based on 100 parts by weight of synergist, 35 parts by weight of alginic acid, 23 parts by weight of polyglutamic acid, 23 parts by weight of γ-aminobutyric acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0114] Add 3 parts by weight of synergist and 2 parts by weight of activator to 158 parts by weight of 45% phosphoric acid (equivalent to 95 parts of monoammonium phosphate) to obtain monoammonium phosphate with the activator component replaced.

[0115] Comparative Example 6

[0116] Monoammonium phosphate 1, a single-component synergist, was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific components are as follows:

[0117] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0118] Preparation of synergist: Based on 100 parts by weight of synergist, 80 parts by weight of alginic acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0119] 10 parts by weight of synergist and 5 parts by weight of activator were added to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain monoammonium phosphate 1, a single-component synergist.

[0120] Comparative Example 7

[0121] Monoammonium phosphate 2, a single-component synergist, was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific components are as follows:

[0122] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0123] Preparation of synergist: Based on 100 parts by weight of synergist, 80 parts by weight of polyglutamic acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0124] 10 parts by weight of synergist and 5 parts by weight of activator were added to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain monoammonium phosphate 2, a single-component synergist.

[0125] Comparative Example 8

[0126] Monoammonium phosphate 3, a single-component synergist, was prepared according to the production process of enhanced water-soluble monoammonium phosphate in Example 1. The specific components are as follows:

[0127] Activator preparation: Based on 100 parts by weight of activator, 25 parts by weight of hydroxypropyl-β-cyclodextrin, 30 parts by weight of citric acid, 25 parts by weight of hydrofluoric acid, 10 parts by weight of phosphonic acid, and 10 parts by weight of sodium dodecylbenzenesulfonate are mixed evenly to obtain the activator.

[0128] Synergist preparation: Based on 100 parts by weight of synergist, 80 parts by weight of γ-aminobutyric acid, 7 parts by weight of glycine, 7 parts by weight of serine, and 6 parts by weight of sodium tetraborate decahydrate are mixed evenly to obtain the synergist.

[0129] 10 parts by weight of synergist and 5 parts by weight of activator were added to 142 parts by weight of 45% phosphoric acid (equivalent to 85 parts of monoammonium phosphate) to obtain monoammonium phosphate 3, a single-component synergist.

[0130] Test experiment:

[0131] 1. The fertilizer effects of the enhanced water-soluble monoammonium phosphate in Examples 1-4 and the monoammonium phosphate in Comparative Examples 1-8 on cotton were tested.

[0132] The experimental design is as follows:

[0133] The cotton variety tested was Xinjiang "Tahe No. 2" cotton.

[0134] Test location: Tarim Basin, Xinjiang

[0135] Trial period: April 1, 2023 - December 1, 2023

[0136] Test fertilizers: synergistic water-soluble monoammonium phosphate from Examples 1-4, and monoammonium phosphate from Comparative Examples 1-8

[0137] Experimental Design: A cotton field trial was conducted to verify the efficacy of synergistic water-soluble monoammonium phosphate (MAP). The experiment consisted of 12 treatments: Treatment 1 was the synergistic MAP obtained in Example 1; Treatment 2 was the synergistic MAP obtained in Example 2; Treatment 3 was the synergistic MAP obtained in Example 3; Treatment 4 was the synergistic MAP obtained in Example 4; Treatment 5 was the ordinary MAP obtained in Comparative Example 1 without synergists and activators; Treatment 6 was the MAP obtained in Comparative Example 2 without activators; Treatment 7 was the MAP obtained in Comparative Example 3 without synergists; Treatment 8 was the MAP obtained in Comparative Example 4 with a different synergist component; Treatment 9 was the MAP obtained in Comparative Example 5 with a different activator component; Treatment 10 was the MAP 1 with a single-component synergist obtained in Comparative Example 6; Treatment 11 was the MAP 2 with a single-component synergist obtained in Comparative Example 7; and Treatment 12 was the MAP 3 with a single-component synergist obtained in Comparative Example 8. Each treatment area was 5 mu (approximately 0.33 hectares), with a phosphorus application rate (P2O5) of 14 kg / mu (approximately 0.33 hectares). Cotton management was carried out according to local conventional cultivation techniques. The yield of each treatment was measured after harvest.

[0138] The experimental results are shown in Table 1:

[0139] Table 1. Effects of enhanced potash fertilizer on cotton yield and growth indicators in Xinjiang.

[0140]

[0141] As shown in Table 1, applying the enhanced water-soluble monoammonium phosphate (MAP) of Examples 1-4 and the MAP of Comparative Examples 1-8 can increase cotton seed yield and promote cotton growth. Compared with the ordinary MAP in Treatment 5, Treatments 1-4 and 6-12 increased cotton seed yield by 7.5%-19.7%, boll number by 2.2%-19.1%, boll weight by 0.9%-6.9%, plant height by 1.5%-11.3%, and stem diameter by 3.3%-23.3%. Treatments 6-12 were weaker than Treatments 1-4 in terms of cotton yield and growth indicators. Among them, Treatments 6-7 show that the combined use of the synergist and activator in this invention is more effective; Treatments 8-9 show that changing the synergist and activator components in this invention reduces the product effect; Treatments 10-12 show that alginic acid, polyglutamic acid, and γ-aminobutyric acid in the synergist of this invention have a synergistic effect and must be added simultaneously to achieve the desired effect.

[0142] 2. The water-insoluble matter and water-soluble phosphorus of the enhanced water-soluble monoammonium phosphate in Examples 1-4 and Comparative Examples 1-8 were determined.

[0143] The specific measurement process is as follows:

[0144] Weigh 1g of sample (accurate to 0.001g) into a glass crucible, add 250ml of deionized water and stir until dissolved. Let the solution stand for 0.5-1h to allow the insoluble matter to precipitate. Filter using microporous filter paper, collect the solid residue, dry the solid residue at 110℃ and weigh it. The ratio of the weight of the solid residue to the mass of the sample is the water-insoluble matter content.

[0145] Weigh approximately 1 g (accurate to 0.0001 g) of the sample into a 200 mL extraction flask, add 100 mL of water, tighten the cap, and shake the flask repeatedly for 30 min in a constant temperature shaker at a vibration speed of 180 times / min. Filter the flask and determine the water-soluble phosphorus content in the filtrate. The phosphorus content in the filtrate is the water-soluble phosphorus content. The experiment consisted of 12 treatments. Treatment 1 was the enhanced water-soluble monoammonium phosphate obtained in Example 1; Treatment 2 was the enhanced water-soluble monoammonium phosphate obtained in Example 2; Treatment 3 was the enhanced water-soluble monoammonium phosphate obtained in Example 3; Treatment 4 was the enhanced water-soluble monoammonium phosphate obtained in Example 4; Treatment 5 was the ordinary monoammonium phosphate without synergists and activators obtained in Comparative Example 1; Treatment 6 was the monoammonium phosphate without activators obtained in Comparative Example 2; Treatment 7 was the monoammonium phosphate without synergists obtained in Comparative Example 3; Treatment 8 was the monoammonium phosphate with a different synergist component obtained in Comparative Example 4; Treatment 9 was the monoammonium phosphate with a different activator component obtained in Comparative Example 5; Treatment 10 was the monoammonium phosphate 1 with a single-component synergist obtained in Comparative Example 6; Treatment 11 was the monoammonium phosphate 2 with a single-component synergist obtained in Comparative Example 7; and Treatment 12 was the monoammonium phosphate 3 with a single-component synergist obtained in Comparative Example 8.

[0146] The experimental results are shown in Table 2:

[0147] Table 2

[0148] deal with Water-insoluble matter content (%) <![CDATA[Water-soluble phosphorus (P2O5) content (%)]]> Process 1 0.93 53.5 Process 2 0.95 53.4 Process 3 0.95 54.9 Process 4 0.91 54.1 Process 5 2.12 49.5 Process 6 1.49 50.1 Process 7 0.92 53.6 Process 8 0.98 52.8 Process 9 1.31 50.9 Process 10 0.96 52.2 Process 11 0.98 52.6 Process 12 0.97 52.7

[0149] Table 2 shows that the addition of the activator of the present invention has a good effect. Compared with treatment 5, treatments 1-4 reduced the water-insoluble matter content by 55.2%-57.1% and increased the water-soluble phosphorus content by 7.9%-10.9%. Meanwhile, compared with treatments 6 and 8-12, treatments 1-4 and 7 showed a decrease in water-insoluble matter content and an increase in water-soluble phosphorus content. This indicates that the activator of the present invention, whether used alone or in combination with a synergist, can reduce the water-insoluble matter content and increase the water-soluble phosphorus content, and is superior to not adding the activator or changing the composition of the activator and synergist.

[0150] In summary, the combined use of the synergist and activator of this invention has good effects. It can not only increase the yield of cotton seed cotton and promote cotton growth, but also reduce the content of water-insoluble matter and increase the content of water-soluble phosphorus.

[0151] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0152] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A monoammonium phosphate, characterized in that, It includes 2-5 parts by weight of activator, 3-10 parts by weight of synergist and 85-95 parts by weight of monoammonium phosphate raw material; The activator comprises 25-35 parts by weight of a solubilizer, 27-30 parts by weight of an organic acid, 23-25 ​​parts by weight of an activator, 8-10 parts by weight of an anti-precipitant, and 7-10 parts by weight of an auxiliary agent. The synergist includes 30-45 parts by weight of alginic acid, 20-25 parts by weight of polyglutamic acid, 20-25 parts by weight of γ-aminobutyric acid, 5-7 parts by weight of glycine, 5-7 parts by weight of serine, and 5-6 parts by weight of boron. The pro-solvent includes at least one of hydroxypropyl-β-cyclodextrin and sulfobutyl-β-cyclodextrin; The active agent includes at least one of hydrofluoric acid, ammonium fluoride, and sodium fluoride; The anti-precipitating agent includes at least one of polyepoxysuccinic acid, phosphonic acid, sulfonated lignin, polyacrylic acid, hydrolyzed polymaleic anhydride, and acrylate-ethyl acrylate-itaconic acid copolymer.

2. The monoammonium phosphate according to claim 1, characterized in that, The organic acid includes at least one of citric acid, malic acid, tartaric acid, oxalic acid, and succinic acid; The additives include at least one of sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium lignosulfonate, sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, benzylphenol polyoxyethylene ether, and phenethylphenol polyoxyethylene ether.

3. The monoammonium phosphate according to claim 2, characterized in that, The boron element is derived from at least one of sodium tetraborate decahydrate, sodium octaborate tetrahydrate, and boric acid.

4. A method for preparing monoammonium phosphate according to any one of claims 1-3, characterized in that, include: The activator and monoammonium phosphate raw material are subjected to a first mixing treatment to obtain the first mixing treatment product; The first mixed product is neutralized with ammonia to obtain a slurry; The slurry is mixed with the synergist in a second process to obtain the monoammonium phosphate.

5. The use of monoammonium phosphate as described in any one of claims 1-3 or the monoammonium phosphate prepared by the method of claim 4 in the cultivation of crops or the improvement of crop yield.

6. A method for increasing the water-soluble phosphorus content of monoammonium phosphate, characterized in that, include: The monoammonium phosphate prepared by means of any one of claims 1-3, or by means of the method described in claim 4.

7. A method for increasing crop yield and promoting crop growth, characterized in that, include: Apply the monoammonium phosphate as described in any one of claims 1-3 or the monoammonium phosphate prepared by the method described in claim 4 to the crop.

8. The method according to claim 7, characterized in that, The crops include at least one of cotton, Arabidopsis thaliana, rice, corn, wheat, sorghum, barley, oats, rye, soybean, tobacco, rapeseed, and tomato.

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