High-efficiency environment-friendly suspended liquid fertilizer

Abstract

The present application belongs to and specifically relates to a high-efficiency environment-friendly suspension liquid fertilizer, which comprises the following ingredients with the weight percentage: macroelement 40-80%, meso-element 1-10%, trace element 0.1-1%, biological stimulation synergist 1-6%, wetting dispersant 1-10%, thickening agent 0.5-5%, suspension aid 0.5-2%, defoaming agent 0.1-1%, and water 100%. The suspension liquid water-soluble fertilizer of the present application uses water as the dispersion medium, and with the aid of the aid, the completely broken small particles of the fertilizer raw material which cannot be completely dissolved due to solution supersaturation are uniformly dispersed in the solution to form a flowable, high-concentration, uniform and stable suspension system. The present application improves the stability of the suspension liquid fertilizer and reduces the generation of precipitates by selecting the suspension aid ingredients.

Description

Technical Field

[0001] The invention belongs to the field of fertilizers, and in particular relates to a high-efficiency and environmentally friendly suspended liquid fertilizer, which is used to improve the stability of the suspended liquid fertilizer and reduce the generation of precipitation. Background Art

[0002] With the continuous development of the fertilizer industry, there are more and more types of fertilizers. According to their chemical composition, they can be divided into: organic fertilizers, inorganic fertilizers, and organic-inorganic fertilizers; according to their nutritional components, they can be divided into: single-element fertilizers and compound fertilizers; according to the way the fertilizer works, they can be divided into: quick-acting fertilizers and slow-acting fertilizers; according to the chemical properties of fertilizers, they can be divided into: alkaline fertilizers, acidic fertilizers and neutral fertilizers; according to the fertilization method, they can be divided into: base fertilizers, flushing fertilizers, and foliar fertilizers; and according to the physical state of fertilizers, they can be divided into: solid fertilizers, liquid fertilizers, and gaseous fertilizers; liquid fertilizers have many advantages over solid fertilizers and have broad prospects.

[0003] Suspended liquid fertilizers utilize a suspending agent to suspend tiny particles of various nutrients within a saturated solution. Nutrients and other active ingredients are not dissolved, and the various components are evenly distributed within the gel, preventing sedimentation and stratification. Suspended liquid fertilizers utilize spatial suspension technology to ensure the stability, uniformity, and disintegration of the suspended particles.

[0004] Suspended liquid fertilizers have become widely used in agricultural production due to their flexible formulations, precise application, and diverse functions. Developing compound liquid fertilizers to meet the diverse nutrient needs of crops is a key area of ​​industry development. However, research has revealed that commercially available liquid fertilizers generally contain low levels of phosphorus. This is primarily due to the precipitation that phosphorus-containing suspended liquid fertilizers easily produce, making them difficult for plants to absorb and utilize, significantly reducing their effectiveness. Therefore, improving the stability of phosphorus-containing liquid fertilizers and reducing the formation of precipitation are key research areas for this study. Summary of the Invention

[0005] The object of the present invention is to provide a highly efficient and environmentally friendly suspended liquid fertilizer to improve the stability of the suspended liquid fertilizer and reduce the formation of precipitation. The specific scheme is as follows:

[0006] A highly efficient and environmentally friendly suspended liquid fertilizer comprises the following components in percentage by weight: 40%-80% of macroelements, 1%-10% of secondary elements, 0.1%-1% of trace elements, 1%-6% of biostimulant synergist, 1%-10% of wetting and dispersing agent, 0.5%-5% of thickener, 0.5%-2% of suspending agent, 0.1%-1% of defoaming agent, and 100% water.

[0007] The macroelements are composed of ammonium nitrate, ammonium polyphosphate and potassium nitrate;

[0008] The intermediate elements are composed of calcium nitrate and magnesium nitrate;

[0009] The trace elements are composed of boric acid and disodium zinc ethylenediaminetetraacetic acid;

[0010] The biological stimulation synergist consists of Bacillus velez and fulvic acid.

[0011] The wetting and dispersing agent is composed of sodium lauryl sulfate, SP-SC 3275 and Terwet 1004; the mass ratio of sodium lauryl sulfate, SP-SC 3275 and Terwet 1004 is 1-3:1-3:1-3;

[0012] The thickener is xanthan gum;

[0013] The suspending agent is bentonite;

[0014] The defoaming agent is dimethyl silicone oil.

[0015] Preferably, the suspended liquid fertilizer comprises the following ingredients in percentage by weight: 20%-40% ammonium nitrate, 5%-15% ammonium polyphosphate, 15%-25% potassium nitrate, 1%-5% calcium nitrate, 1%-5% magnesium nitrate, 0.05%-0.5% boric acid, 0.05%-0.5% zinc disodium ethylenediaminetetraacetic acid, 0.5%-3% Bacillus Velez, 0.5%-3% fulvic acid, 1%-3% sodium lauryl sulfate, 1%-3% SP-SC 3275, 1%-3% Terwet 1004, 0.5%-2% xanthan gum, 1%-2% bentonite, 0.1%-1% dimethyl silicone oil, and water to make up to 100%.

[0016] Particularly preferably, the suspended liquid fertilizer comprises the following ingredients in percentage by weight: 35% ammonium nitrate, 10% ammonium polyphosphate, 20% potassium nitrate, 1%-5% calcium nitrate, 1%-5% magnesium nitrate, 0.1% boric acid, 0.15% zinc disodium edetate, 1% Bacillus Velez, 2.5% fulvic acid, 2% sodium lauryl sulfate, 2% SP-SC 3275, 2% Terwet 1004, 1% xanthan gum, 1.5% bentonite, 0.5% dimethyl silicone oil, and water to make up to 100%.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] The suspended liquid water-soluble fertilizer of the present invention uses water as a dispersion medium and, with the help of an auxiliary agent, evenly disperses the completely broken small particles of fertilizer raw materials that cannot be completely dissolved due to the oversaturated solution in the solution, thereby forming a flowable, high-concentration, uniform and stable suspension system.

[0019] The wetting and dispersing agent used in this invention coats the surface of the raw material microparticles, forming a thick polymer protective film. This film increases mutual repulsion, enhances the stability of the suspension system, prevents aggregation and flocculation between suspended particles, and facilitates wetting of crystals, resulting in a uniformly dispersed system.

[0020] The invention improves the stability of suspended liquid fertilizer and reduces the generation of precipitation by selecting the suspension auxiliary agent components. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0022] The present invention will be further explained below with reference to specific embodiments.

[0023] Example 1:

[0024] Suspension liquid fertilizer formulation and stability testing

[0025] 1.1 The specific formula is as follows:

[0026]

[0027]

[0028] 1.2 Preparation method of suspended liquid fertilizer:

[0029] Micro-crushing of raw and auxiliary materials: The raw and auxiliary materials entering the factory must be strictly pre-treated and crushed by precision micro-powder ball mill crusher. After micronization treatment (particle size ≤ 2um), qualified raw and auxiliary materials that meet the requirements for preparing liquid suspended fertilizers can be obtained.

[0030] Raw material mixing: According to the formula composition, the pretreated raw and auxiliary materials are introduced into the reactor through the metering equipment, soaked, and cyclically sheared, crushed, mixed and stirred to prepare the slurry.

[0031] Preparation of finished product: The above slurry is input into the homogenizing colloid mill device through the material guide pump for high-pressure shearing, crushing and emulsification process to produce a uniformly dispersed emulsified fertilizer product.

[0032] Product packaging: The qualified finished product liquid, which has been crushed and emulsified by the homogenizing colloid mill, is introduced into the finished product liquid storage tank by the discharge pump. After passing the inspection, it is transported to the fully automatic filling machine in batches, and is filled into the anti-flatulence packaging material with one-way decompression function through precise measurement, labeled and packed.

[0033] 1.3 Suspended liquid fertilizer performance index test

[0034] Determination of sedimentation rate of liquid fertilizer

[0035] Refer to "NY / T1973-2021" Determination of water-insoluble matter content and pH of water-soluble fertilizers. Weigh about 1g of sample (accurate to 0.001g), place it in a beaker, add 250ml of water, stir thoroughly for 3 minutes, and let it stand for (15±3) minutes. Filter with a glass crucible filter that has been dried to constant weight in a 110°C oven in advance. First filter the supernatant, then use a small amount of water to transfer all the residue into the filter. Place the filter with the residue in a 110°C oven and dry it for 1 hour. Take it out and move it to a drying oven, cool it to room temperature, and weigh it.

[0036] Calculation formula: w = (m2-m1) / m×100%;

[0037] Where: w: precipitation rate expressed as mass fraction (%); m2: mass of glass crucible filter and water-insoluble matter, g; m1: mass of glass crucible filter, g; m: mass of sample, g.

[0038] Determination of liquid fertilizer stability coefficient

[0039] Accurately add 10 ml of finished liquid fertilizer into a graduated centrifuge tube, centrifuge at 3500 r / min for 10 minutes, take the supernatant and dilute it 100 times, and use a UV spectrophotometer to measure the absorbance value A2 at 330 nm. The ratio of the absorbance value A2 to the absorbance value A1 before centrifugation is used as the stability coefficient R. The higher the stability coefficient, the better the stability.

[0040] Calculation formula: R = A2 / A1

[0041] Where: A1: absorbance value of sample solution before centrifugation; A2: absorbance value of sample solution after centrifugation.

[0042] Test Results: As shown in Table 1, the selection of wetting and dispersing agents, thickeners, and whether or not a suspending agent is added to the suspended liquid fertilizer significantly affects the stability of the suspended liquid fertilizer. Compared with other formulations, the wetting and dispersing agents in F4, which consist of sodium lauryl sulfate, SP-SC 3275, and Terwet 1004; the thickener is xanthan gum; and the suspending agent is bentonite, can significantly reduce the sedimentation rate of the suspended liquid fertilizer and improve its stability.

[0043] Table 1 Test results of performance indicators of suspended liquid fertilizer

[0044] deal with Sedimentation rate% Stability factor F1 0.72 0.62 F2 0.53 0.71 F3 0.45 0.78 F4 0.11 1.21 F5 0.30 1.08 F6 0.31 1.07 F7 0.42 0.82 F8 1.25 0.50

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A highly efficient and environmentally friendly suspended liquid fertilizer, characterized in that: The invention comprises the following ingredients in percentage by weight: 20%-40% ammonium nitrate, 5%-15% ammonium polyphosphate, 15%-25% potassium nitrate, 1%-5% calcium nitrate, 1%-5% magnesium nitrate, 0.05%-0.5% boric acid, 0.05%-0.5% zinc disodium ethylenediaminetetraacetic acid, 0.5%-3% Bacillus velezensis, 0.5%-3% fulvic acid, 1%-3% sodium lauryl sulfate, 1%-3% SP-SC 3275, 1%-3% Terwet 1004, 0.5%-2% xanthan gum, 1%-2% bentonite, 0.1%-1% dimethyl silicone oil, and the water content reaches 100%.

2. The suspended liquid fertilizer according to claim 1, characterized in that The product contains the following ingredients in percentage by weight: ammonium nitrate 35%, ammonium polyphosphate 10%, potassium nitrate 20%, calcium nitrate 1.5%, magnesium nitrate 1.5%, boric acid 0.1%, zinc disodium edetate 0.15%, Bacillus velezensis 1%, fulvic acid 2.5%, sodium lauryl sulfate 2%, SP-SC 3275 2%, Terwet 1004 2%, xanthan gum 1%, bentonite 1.5%, dimethicone 0.5%, and water to make up to 100%.

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