17 results about "Monobasic ammonium phosphate" patented technology

The application relates to the technical field of chemical preparation, and particularly relates to a liquid monoammonium phosphate and iron phosphate production system. The system comprises a mother liquor treatment device, a pH adjusting tank, a purified phosphoric acid storage tank, a liquid monoammonium phosphate storage tank and an iron phosphate production device; the output end of the mother liquor treatment device is connected with the first input end of the pH adjusting tank, the output end of the purified phosphoric acid storage tank is connected with the second input end of the pH adjusting tank, and the purified phosphoric acid and the mother liquor to be adjusted are injected into the pH adjusting tank; the mixed reaction area of the pH adjusting tank is configured to neutralize the mother liquor to be adjusted and the purified phosphoric acid according to a preset ratio to generate liquid monoammonium phosphate; the input end of the liquid monoammonium phosphate storage tank is connected with the output end of the pH adjusting tank, the output end of the liquid monoammonium phosphate storage tank is connected with the raw material inlet of the iron phosphate production device, and the iron phosphate production device is configured to synthesize iron phosphate by taking the liquid monoammonium phosphate as a raw material. The application has the beneficial effects of simplifying a production process and reducing energy consumption.

This invention relates to a method for the graded utilization of wet-process phosphoric acid and the co-production of food-grade phosphoric acid and ammonium phosphate, belonging to the field of phosphoric acid chemical technology. The method first purifies the raw phosphoric acid, with the main process involving multi-stage extraction and back-extraction to obtain food-grade phosphoric acid. For the byproduct raffinate acid, no complex purification is required; instead, a slurry process is used directly to prepare fertilizer. When producing diammonium phosphate, the final neutralization pH is controlled at 8.0-8.5, and the degree of ammoniation is 1.8-2.0. When producing monoammonium phosphate, the raffinate acid is mixed with slag acid and filter solids, and a small amount of raw material acid is added to neutralize to a pH of 4.0-4.5, with a degree of ammoniation of 1.0-1.1. This invention overcomes the problems of high slurry viscosity, equipment blockage, and low product grade caused by the direct fertilizer production of raffinate acid with a simplified process. Furthermore, it coordinates with the disposal of system waste in monoammonium phosphate production, truly achieving high-value utilization and clean production of all components of wet-process phosphoric acid.

A continuous phosphate crystallization system and a phosphate manufacturing method. The continuous phosphate crystallization system comprises a monoammonium phosphate production system (100), an integrated continuous crystallizer (7), a crystallization circulation pump (9), a crystallization heater (10), a crystallization vacuum condensation system (11), a crystallization material pump (12), a thickener (13), and a centrifuge (15), wherein a raw material input end of the integrated continuous crystallizer (7) is configured to be connected to a raw material phosphoric acid of a second concentration and an ammonia gas, or to be connected to a monoammonium phosphate slurry output end of the monoammonium phosphate production system (100), a circulating material output end of the integrated continuous crystallizer (7) is connected to a circulating material input end by means of the crystallization circulation pump (9) and the crystallization heater (10) in sequence, a crystallized material output end is connected to an input end of the centrifuge (15) by means of the crystallization material pump (12) and the thickener (13) in sequence, and the centrifuge (15) outputs a phosphate to be dried. The method comprises: delivering a raw material phosphoric acid of a first concentration in the range of 40-58% to the monoammonium phosphate production system (100) to obtain flash steam and a monoammonium phosphate slurry, and delivering the monoammonium phosphate slurry into the integrated continuous crystallizer (7) to obtain a crystallized material; or, delivering a raw material phosphoric acid of a second concentration in the range of 75-85% and an ammonia gas into the integrated continuous crystallizer (7) to obtain a crystallized material; and sequentially performing thickening, centrifugation and drying on the crystallized material to obtain a phosphate.

This application discloses a method for producing industrial-grade ammonium dihydrogen phosphate, comprising: a desulfurization reaction tank, a heavy metal removal reaction tank, a multi-stage aeration tank, a settling tank, a primary membrane filter, an acid mixer, a neutralization reaction tank, and a multi-stage plate and frame membrane filter assembly; the desulfurization reaction tank and the heavy metal removal reaction tank are connected by pipelines; the outlet of the heavy metal removal reaction tank is connected by pipeline to the inlet of the first-stage aeration tank of the multi-stage aeration tank; the outlet of the last-stage aeration tank of the multi-stage aeration tank is connected by pipeline to the inlet of the settling tank. This method, by adding a primary membrane filter assembly before acid conditioning, reduces the impurity and solid content of the pretreated acid, increases phosphorus yield, reduces the amount of ammonium slag in the pretreated acid, and reduces filtration intensity, which is beneficial for improving product quality and the system's capacity after maintenance. The equipment used is reliable, requires low investment, has low labor intensity, and can achieve continuous and stable operation.

The present application relates to a kind of biological carbon-based fertilizer of reducing sand ginger black soil obstacle factor and its preparation method and application, the preparation raw material of the biological carbon-based fertilizer, according to weight parts, including magnesium-pit pit clay modified biochar 5-10, urea powder 0-50 parts, ammonium chloride powder 4-20 parts, monoammonium phosphate powder 10-30 parts, potassium chloride powder 10-30 parts, ammoniated humic acid 5-15 parts, liquid adhesive 1-10 parts.The biological carbon-based fertilizer of the present application is introduced by rich Mg 2+ Pit pit clay modified biochar-based composite carrier, using ion exchange replacement sand ginger black soil interlayer Na + Of montmorillonite, compressed diffusion double electric layer to inhibit soil swelling, while the bridging effect of carbon-based surface functional groups and Mg 2+ , promote soil particle aggregation to form stable structure, and utilize the porous characteristics of carbon-based and hydrophilic group to enhance the water holding capacity of soil, so as to reduce sand ginger black soil dry shrinkage and other obstacle factors, promote soil fertility and sustainable development of agricultural production.

The method for producing powdery high-concentration monoammonium phosphate by two-stage neutralization of high-impurity raffinate acid is as follows: the by-product raffinate acid generated in the production process of wet purified phosphoric acid is preheated to 65-75 DEG C, ammonia gas is first introduced to perform a first-stage neutralization reaction, the pre-stable impurity neutralization slurry is obtained after constant temperature ripening, ammonia gas is introduced to perform a second-stage neutralization reaction on the pre-stable impurity neutralization slurry, the qualified monoammonium phosphate slurry is obtained after constant temperature ripening, the qualified monoammonium phosphate slurry is continuously subjected to grading concentration, drying is performed after the slurry solid content is concentrated to 70-75%, and the powdery high-concentration monoammonium phosphate product is prepared. The present application takes the by-product high-impurity raffinate acid generated in the production process of wet purified phosphoric acid as the only phosphorus source, realizes full-value utilization of the raffinate acid, the process is green and environmentally friendly, and is suitable for industrialized continuous production.

This invention relates to improving the efficiency of artificial and / or natural organic-based animal manure fertilizers by applying formulations containing poly(organic acid) [P(OA)] and / or its salts dispersed in a non-aqueous organic solvent delivery system (NOSDS). The use of NOSDS allows for the coating of all components of the fertilizer formulation with a layer of [P(OA)] and / or its salts, including but not limited to urea, manure, monoammonium phosphate (MAP), diammonium phosphate (DAP), solid micronutrients (such as lime, zinc chloride, etc.). The layer of [P(OA)] and / or its salts releases micronutrient metals and macronutrients bound to the soil as insoluble salts and complexes in a plant-available form. As a carboxylic acid, carboxylic anhydride, and / or carboxyl imide dispersed within NOSDS, the carboxyl group of [P(OA)] can be neutralized by one or more metals and / or nitrogen-containing compounds (such as ammonia, ammonium hydroxide, or organic amines) in the form of elemental metals, metal oxides, metal hydroxides, metal alkylates, and metal carbonates to form a stable dispersion that may contain fully complexed micronutrients and provide a carrier for transporting these nutrients to the soil and / or as a mulch to the surface of fertilizer particles and seeds.

The application discloses a kind of controlled-release phosphorus element particles and preparation method, belong to controlled-release fertilizer technical field.The controlled-release phosphorus element particles include phosphorus element nutrient core and polyurethane coating layer, and at least one of monoammonium phosphate and diammonium phosphate is used as phosphorus source raw material in the phosphorus element nutrient core, functional carrier and phosphorus activation modifier are matched, and after granulation, drying, polyurethane coating layer is individually coated.The preparation method includes five steps of raw material pretreatment, mixing granulation, drying treatment, coating curing and screening packaging, the functional carrier can be modified according to demand, or secondary coating is carried out to prolong the controlled-release period.The application can flexibly select the controlled-release phosphorus particles of the application and other nutrient fertilizers (such as single-coated nitrogen and potassium particles) according to the growth requirements of plants, and the nutrient requirements of different crops and different growth stages are matched, the preparation process is simple, the cost is low, the environment is friendly, and the application prospect is wide.

This invention relates to the field of phosphorus chemical technology and discloses a method for preparing monoammonium phosphate (MAP) using phosphorus and fluorine wastewater residue and residual phosphoric acid raffinate. The method involves mixing and reacting phosphorus and fluorine wastewater residue, residual phosphoric acid raffinate, and sodium sulfate, controlling the ratio of F / Mg to be greater than 4 and the ratio of Na / Mg to be greater than 3 in the reaction system. The reaction produces dilute phosphoric acid and phosphogypsum. After solid-liquid separation, the filtrate is dilute phosphoric acid. Ammonia is added to the dilute phosphoric acid for neutralization, followed by filtration. The resulting filtrate is then concentrated through at least one evaporation and cooling crystallization to obtain the MAP product. This invention uses residual raffinate to prepare MAP, with phosphorus and fluorine wastewater residue as a desulfurizing agent. The calcium source in the residue can be used as a desulfurizing agent, the phosphorus source can produce phosphoric acid, and fluorine acts as a co-precipitant to remove magnesium. This avoids the need to add additional fluorine-containing reagents in industrial MAP production, resulting in a simpler process and lower cost.

This application relates to the field of compound fertilizer technology, specifically disclosing a special fertilizer for Artemisia argyi and its preparation method. This special fertilizer comprises the following components: 500-600 parts of well-rotted straw organic fertilizer, 60-100 parts of humic acid, 30-50 parts of amino acid raw powder, 40-50 parts of ammonium sulfate, 80-90 parts of monoammonium phosphate, 60-65 parts of potassium sulfate, 10-20 parts of calcium carbonate, 10-15 parts of magnesium sulfate, 1-3 parts of boric acid, 1-5 parts of ferrous sulfate, 1-5 parts of manganese sulfate, and 30-35 parts of bio-based polyurethane. The bio-based polyurethane coating agent uses bio-based PDI and castor oil-based polyols as raw materials, and employs chain extenders and grafting monomers derived from bio-based sources. This coated fertilizer effectively solves the problems of easy clumping and inconvenient storage, while also achieving precise nutrient supply through a slight slow-release effect. Meanwhile, the bio-based coating is biodegradable, leaves no soil residue, does not damage the soil structure, does not affect the medicinal quality of Artemisia argyi, and can also improve the utilization rate of fertilizer nutrients and reduce nutrient loss.

This invention relates to the fields of phosphate chemical industry, fertilizer production, and feed additive preparation technology, and provides an apparatus and method for flexibly producing multiple types of products. The apparatus provided by this invention includes a raw material supply unit, a reaction unit, a drying unit, a post-processing unit, and a flexible switching unit. This apparatus can quickly switch between producing powdered monoammonium phosphate, granular monoammonium phosphate, granular diammonium phosphate, feed-grade dicalcium phosphate, and compound fertilizer. One set of equipment can replace five dedicated production lines, reducing equipment investment costs by more than 40%. The product switching cycle is ≤4 hours, offering high production flexibility and allowing for rapid adjustments to production plans based on market demand. Equipment utilization is increased to over 90%, solving the problem of idle dedicated production lines. Furthermore, this invention uses PLC to precisely control process parameters, ensuring a product quality compliance rate of ≥98%, eliminating cross-contamination during switching, and resulting in high-quality products.

This invention discloses a large-sheet battery-grade anhydrous ferric phosphate and its preparation method. The preparation method includes: S1, preparing a ferric sulfate solution with an iron concentration of 55-65 g / L and a monoammonium phosphate solution with a phosphorus concentration of 80-100 g / L; S2, adjusting the pH of the iron solution to 1-2, preheating the phosphorus solution to 50-60℃ as the base solution, adding the preheated iron solution dropwise, controlling the phosphorus-iron molar ratio to 1.18-1.28, maintaining the temperature at 50-60℃ for 0.5-1 h, and aging at 85-95℃ for 2-3 h to obtain an anhydrous ferric phosphate slurry; S3, filtering, washing, and drying the anhydrous ferric phosphate slurry to obtain ferric phosphate dihydrate; S4, calcining to obtain anhydrous ferric phosphate for large-sheet batteries. This method requires no additives, and the obtained anhydrous ferric phosphate has a regular large-sheet structure, a D50 particle size of 5.66-6.57 μm, and a tap density of 2.72 g / cm³. 3 The above-mentioned materials have high purity and are suitable for high-energy-density battery systems.

This invention relates to the field of fertilizers, providing a humic acid-based compound fertilizer, its preparation method, and its application. By weight, the humic acid-based compound fertilizer comprises the following raw materials: 30-40 parts of potassium nitrohumate slurry, 15-25 parts of monoammonium phosphate, 15-20 parts of urea, 5-10 parts of potassium dihydrogen phosphate, 3-5 parts of trace element chelate solution, and 0.5-1 parts of sulfonate filtration reducer. The humic acid-based compound fertilizer provided by this invention solves the water solubility problem of traditional humic acid and has the advantage of complete nutrition. It can efficiently promote crop growth and is applicable to economic crops such as melons, fruits, vegetables, underground root crops, flowers, and medicinal herbs.

The application relates to the technical field of battery material preparation, in particular to a method for preparing iron phosphate, iron phosphate and application. The method comprises the steps of adding a crystal form inhibitor into a crude iron phosphate product, aging, and calcining; the crystal form inhibitor comprises a phosphoric acid type crystal form inhibitor and an iron type crystal form inhibitor; the phosphoric acid type crystal form inhibitor comprises at least one of monoammonium phosphate, diammonium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate and phosphoric acid; and the iron type crystal form inhibitor comprises at least one of iron hydroxide, iron hydroxyphosphate, iron sulfate and iron oxalate. The prepared iron phosphate has few by-products in the aging stage, high iron-phosphorus ratio, good capacity and rate performance, and long cycle life.

1. Name of the product in this design: Fertilizer bag (Meilinmei monoammonium phosphate). 2. Application of this design: This design is intended for use in fertilizer packaging bags. 3. The key design features of this product are its shape and pattern. 4. The image or photograph that best illustrates the design's key features: the front view. 5. This design is for a thin product, therefore the left view, right view, top view, and bottom view are omitted.

This invention discloses a functional fertilizer containing an acid-absorbing and oxygen-enhancing compound biostimulant and its preparation method, belonging to the field of agricultural fertilizer technology. The functional fertilizer comprises the following raw materials in parts by weight: 25-40 parts urea, 15-30 parts monoammonium phosphate, 10-25 parts potassium sulfate, 2-10 parts shell powder, 5-15 parts oxygenating agent, 2.5-10 parts biostimulant, and 0.1-1 parts trace elements. The biostimulant includes polyaspartic acid, mineral-derived potassium humate, microbial inoculants, seaweed active substances, and vitamin C; the microbial inoculants include Bacillus subtilis and Bacillus pyrifos. The functional fertilizer of this invention has a pH value of 7.5-8.5, belonging to alkaline fertilizer, and is suitable for acidic soils with a pH value ≤ 5.5. This functional fertilizer contains comprehensive nutrients, with a reasonable nutrient ratio, and works synergistically to improve the physical properties and biological activity of the soil, activate soil nutrients, improve nutrient utilization, and significantly increase the yield and quality of navel oranges.

The invention relates to the technical field of compound fertilizers, and provides a high-temperature-resistant bacteria-containing compound fertilizer and a preparation method thereof.The preparation method comprises the following steps that nanoscale freeze-dried bacterial powder is prepared from bacillus, bacillus stearothermophilus and rhodopseudomonas palustris; mixing the nano TiO2 modified SiO2 composite aerogel, diatomite, the modified charcoal, sepiolite and pullulan to prepare a microbial inoculum protection composite carrier; and mixing the freeze-dried bacterial powder with a carrier, and drying to obtain the micron-sized capsule bacterial agent. Uniformly mixing a reinforcing agent, a plasticizer and a stabilizer to prepare a performance regulator; the preparation method comprises the following steps: melting choline chloride-containing urea and monoammonium phosphate to prepare molten slurry; mixing the molten slurry with a compound fertilizer to form uniform slurry; and mixing the slurry with a micron-sized capsule microbial inoculum and a performance regulator, and granulating to obtain the high-temperature-resistant bacterium-containing compound fertilizer. By optimizing the adaptability of a microbial agent embedding carrier and a melting system, the technical bottleneck of conflict between high-temperature inactivation of the microbial agent and physical properties of a product is solved.