18 results about "N fertilizer" patented technology

The group of inventions relates to the chemical industry, and more particularly to the production of nitrogen fertilizers, and can be used for producing granules of fertilizers such as, inter alia, ammonium nitrate, urea and ammonium nitrate-phosphate fertilizers, by prilling. What is proposed is a method for forming nitrogen fertilizer granules by prilling using a closed air circulation loop, in which cooling air is fed into the lower part of a prilling tower, a nitrogen fertilizer melt is sprayed into the upper part of the prilling tower, and granules are removed from the lower part of the tower. By means of at least one closed circulation loop, air is removed from the upper part of the prilling tower for preparation by purification and cooling and is returned to the lower part of the prilling tower as cooling air, wherein before being returned to the prilling tower, at least a portion of the air is sent for additional preparation by aftercooling, with the separation and removal of condensate and subsequent warming of the air. Also proposed is an apparatus for carrying out the claimed method. The technical result of the group of inventions consists in increasing the efficiency of a prilling process entailing a closed loop for the circulation of cooling air by improving the quality of the fertilizer produced, increasing operational reliability and reducing the overall dimensions of the equipment used, while maintaining a complete absence of prilling process emissions and obviating the need for the inspiration of external air.

The present disclosure provides system and method for synthesis of green ammonia and other nitrogenous fertilizers derived from it including urea and nitric acid (as well as others that may be produced by any combination / reaction of these) by coupling renewable energy and Carnot battery with Solid-Oxide Electrolyser Cell (SOEC) and Direct Air Capture (DAC). 5 The system provides a solution for round-the-clock renewable energy using Carnot battery that provides both heat and power to run SOEC. The heat from Carnot battery is used by DAC to capture carbon dioxide from air. A nitrogen-oxygen generator may produce nitrogen using continuous power from Carnot battery. Ammonia may be produced by using hydrogen from SOEC, and nitrogen from the nitrogen-oxygen generator. Urea may be produced using 0 carbon dioxide from DAC and ammonia. Ammonia and oxygen from SOECs and nitrogen- oxygen generator may be used for synthesis of nitric acid, and other nitrogenous fertilizers. The process heat from ammonia and nitric acid synthesis is recycled back to the Carnot battery.

This invention provides a method for increasing wheat yield without topdressing, using a compound fertilizer in granular form, comprising, from the inside out: an inner core containing fast-acting nitrogen fertilizer, a urease inhibitor, and a nitrification inhibitor; a middle layer containing slow-release nitrogen fertilizer and enzyme activating substances; and an outer layer containing controlled-release nitrogen fertilizer and sugar-enhancing substances. The inner, middle, and outer layers form a functional spatiotemporal coupling structure, matching nitrogen release with the nitrogen requirements of wheat during its growth period, with an effective fertilizer period of 110-120 days. In the inner core, the urease inhibitor is selected from NBPT (n-butylthiophosphoric triamine) or its derivatives, and the nitrification inhibitor is selected from DMPP (3,4-dimethylpyrazole phosphate) or DCD (dicyandiamide). This invention's compound fertilizer provides effective nitrogen supply for 110-120 days, covering the entire wheat growth period, achieving a single basal application and eliminating the need for topdressing throughout the entire growth period, reducing fertilization operations by 2-3 times and significantly lowering labor costs.

This invention discloses a differentiated fertilization method for Scutellaria baicalensis, belonging to the field of traditional Chinese medicinal herb cultivation technology. This method selects a corresponding ratio from multiple predetermined nitrogen, phosphorus, and potassium fertilizer application ratios based on the accumulation requirements of the target medicinal components, thereby achieving targeted regulation of different medicinal components. The multiple predetermined nitrogen-phosphorus-potassium ratios include a first ratio that increases baicalin, a second ratio that increases baicalein, a third ratio that increases wogonin, and a fourth ratio that increases wogonein. This invention allows for flexible selection of ratios according to production targets, achieving precise regulation of different medicinal components while simultaneously increasing Scutellaria baicalensis yield, and has good prospects for widespread application.

The invention provides a rare-earth slow-release fertilizer as well as a preparation method and application thereof. The rare-earth slow-release fertilizer comprises rare-earth slow-release particles and a basic fertilizer, the rare earth sustained-release particle comprises an inner core formed by rare earth ions and a chelating agent, and a coating layer coating the inner core, the chelating agent comprises unsubstituted and / or alkyl substituted dithiocarbamate; the basic fertilizer comprises any one or a combination of at least two of nitrogenous fertilizer, phosphatic fertilizer or potash fertilizer. The rare earth slow-release fertilizer provided by the invention realizes gradient release of rare earth ions, has slow-release stability in a wide pH range, reduces soil rare earth loss, improves the bioavailability of the rare earth ions, and reduces the risk of environmental pollution.

The invention relates to high-stability ammonium carbamate powder as well as a preparation method and application thereof, in particular to the preparation method of the high-stability ammonium carbamate powder, which comprises the following steps: under the action of a catalyst, enabling carbon dioxide and ammonia gas to react in a gas reaction tower to generate the ammonium carbamate powder containing more than 10% of beta crystal form. The problems that ammonium carbamate is easy to decompose and difficult to store are solved, and a reliable technical scheme and application prospects are provided for the ammonium carbamate serving as an efficient, stable and environment-friendly novel nitrogen fertilizer.

This invention belongs to the field of maize planting technology, and discloses a high-yield maize planting method based on a combination of density and fertilization, comprising the following steps: S1, planting maize using a wide-narrow row planting method; S2, planting maize in wide rows... 2 Calculate the planting spacing for wide-narrow row planting method using formula s. 1 =(1 / ax) 1 )*666.7, calculate the original corn planting spacing x 1 , will x 1 and y 2 Substitute the value into x 2 y 2 / 2=x 1 Given a / 2, calculate the planting spacing x when using the wide-narrow row planting method. 2 S3. Based on the narrow row y in step S1 1 、wide line y 2 Plant spacing x 2 Plant corn; S4, apply base fertilizer and top-dress with nitrogen fertilizer. This invention can ensure that the space occupied by individual corn plants remains unchanged by adjusting the spacing between wide and narrow rows, thus overcoming the technical bottleneck of increasing plant density without reducing yield, realizing the logic and formula of plant spacing optimization, and thereby achieving an overall yield increase.

The application discloses a kind of based on nutrient supply and demand balance winter rape special fertilizer and fertilization method, belong to the technical field of crop planting, including the following steps: (1) obtain the N, P and K nutrient uptake of aboveground part of rape, calculate and determine the initial proportion of N, P and K nutrient;(2) according to the initial proportion of N, P and K nutrient provided by the fertilizer of the obtained rape growth period in step (1), obtain the correction fertilizer N, P and K nutrient proportion;(3) combined with the correction fertilizer N, P and K nutrient proportion obtained in step (2), determine the best proportion of rape N fertilizer base application, seedling stage topdressing and bud stage topdressing, P fertilizer and K fertilizer are all base application, obtain winter rape special fertilizer compound fertilizer.The fertilization method of the application reduces 20%~25% fertilizer, improves the nitrogen utilization efficiency.At the same time, the average yield of rape is increased by 5.5%~12.6%, the oil content and yield of rape are improved, the content of erucic acid, glucosinolate and other substances and soil bulk density are reduced.

The invention discloses a water-soluble polymorphic nitrogen fertilizer mixing, stirring, wrapping and granulating device and method, and belongs to the technical field of water-soluble polymorphic nitrogen fertilizer production. The device comprises a stirring assembly, a conveying assembly and a wrapping and granulating assembly, the wrapping and granulating assembly comprises a supporting frame, the supporting frame is rotationally connected with a rotating cylinder, a mixing assembly is installed in the rotating cylinder, the mixing assembly comprises a fixing plate fixedly installed on the supporting frame, the fixing plate is rotationally connected with a control cylinder in a penetrating mode, and the control cylinder is connected with the conveying assembly. A power assembly is fixedly installed on the supporting frame. In the process of mixing, stirring, wrapping and granulating the water-soluble polymorphic nitrogen fertilizer, the mixing and stirring effect on materials in the rotating cylinder can be better improved, the mixing and stirring speed of the materials in the rotating cylinder is increased, the processing time is saved, and meanwhile, the processing effect is better.

The invention relates to the technical field of corn fertilization, and provides a corn whole growth period precise fertilization method, which comprises the following steps: S1, applying a base fertilizer containing a nitrogen fertilizer, a phosphate fertilizer, a potassium fertilizer, fucoidan, calcium ammonium nitrate, zinc citrate, potassium humate and gamma-polyglutamic acid between corn rows during corn sowing; s2, spraying a leaf fertilizer containing monopotassium phosphate, magnesium sulfate, alginic acid and polyaspartic acid in a corn filling stage; the base fertilizer is a slow-release fertilizer, and is sequentially coated with a polyester composite layer and a wax layer after being mixed and granulated. According to the scheme, the base fertilizer is prepared into double-layer coated slow-release particles and then applied along with sowing, the outer bran wax / microcrystalline wax forms a hydrophobic barrier to inhibit sudden release and salt damage in the seedling stage, and the inner polyester composite layer forms a controllable water channel and is slowly hydrolyzed along with time, so that nutrients enter staged platform type supply in the corn growing period; and precise fertilizer supply and efficient utilization in the whole growth period are achieved.

The invention provides a preparation method of imidacloprid. The preparation method comprises the following steps: S1, mixing N-nitroimino imidazolidine, water and a phase transfer catalyst, heating and dissolving to obtain a first reaction system; and S2, dropwise adding liquid 2-chloro-5-chloromethylpyridine into the first reaction system, and synchronously introducing ammonia gas for reaction to obtain a product system. Ammonia water generated by ammonia dissolution is used as an acid-binding agent, ammonium chloride is formed after subsequent reaction and can be treated as a nitrogen fertilizer after simple separation, and the situation that salt formed by using other acid-binding agents in a traditional process is difficult to treat is avoided. Meanwhile, according to the preparation method, the characteristic of low solubility of imidacloprid in water is fully utilized, and water is adopted as a solvent, so that imidacloprid formed by reaction can be separated out of a liquid phase system in a solid state, the formation of disubstituted impurities is effectively reduced, and the selectivity of imidacloprid is improved.

1. Name of the designed product: packaging bag (containing phosphorus efficient nitrogen fertilizer). 2. Use of the designed product: for nitrogen fertilizer packaging bag. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo that best indicates the design points: front view. 5. The designed product is a thin product, and other views are omitted.

A fertilizer composition containing a calcium sulfate urea (UCS) fertilizer and a urea free nitrogenous fertilizer and methods for making and using the same are disclosed. The calcium sulfate urea can be a calcium sulfate urea adduct. The urea free nitrogenous fertilizer can include one or more of ammonium sulfate urea and ammonium nitrate.

The invention discloses a method for all-component separation, purification and high-value utilization of ammonium sulfate waste residues, which comprises the following steps: by using low-cost ammonium fluoride as a fluorine source, selectively precipitating Mg < 2 + > through one-step fluorination conversion, preparing high-purity MgF2, recovering valuable metals by combining an extraction-reverse extraction process, and preparing a manganese-magnesium ferrite material by combining sol-gel and high-temperature calcination processes. And recovering an ammonium sulfate by-product. Compared with an existing high-purity inorganic salt preparation process, high-value utilization of all-component resources in the waste residues is achieved, and the problems that waste residues are difficult to treat, cost is high and the like are solved. The method adopts a one-step fluorination conversion, extraction and reverse extraction process and a sol-gel method, and is low in cost, high in resource utilization rate, non-toxic and harmless. The prepared magnesium fluoride can be applied to the fields of optical materials and electronic ceramics; mnxMg (1-x) Fe2O4 has good magnetism and photocatalytic performance, so that organic pollutants can be degraded; the recovered ammonium sulfate can be directly used as a nitrogen fertilizer raw material, so that multi-component synergistic high-value utilization is realized.

The invention provides a field crop whole growth period one-time fertilization method based on a super-large granular fertilizer. The super-large granular fertilizer is applied to soil which is 3-10 cm away from crop seeds / root systems or rows where the crop seeds / root systems are located and 5-15 cm away from the soil surface; the ultra-large granular fertilizer comprises a common quick-acting nitrogen fertilizer, a phosphate fertilizer and a potash fertilizer, and does not contain a sustained and controlled release additive or a carrier, and the mass ratio of the nitrogen fertilizer to the phosphate fertilizer to the potash fertilizer is (30-35): (5-8): (5-8) based on N, P2O5 and K2O; the mass of a single extra-large granular fertilizer is 1.5-8 g, and the particle size is larger than or equal to 7 The ultra-large granular fertilizer application method can meet the requirement of field crops for nutrients in the whole growth period only through one-time application without any topdressing, the slow release effect of the fertilizer is obvious, the absorption rate of the crops for nitrogen in the fertilizer is remarkably increased, and compared with a conventional technology with the same fertilization amount, the yield is increased by 30% or above; compared with an existing one-time hole application technology with the same fertilization amount, the yield is increased by 10% or above, and income is increased remarkably.

The invention discloses a method for improving soil carbon balance and increasing corn yield, and belongs to the technical field related to agriculture. The method comprises the steps that after corn is harvested, green manure is sown in a field until one month before corn sowing, the green manure is turned over and returned to the field, base fertilizer is applied to soil before corn sowing, and the base fertilizer comprises organic fertilizer and inorganic fertilizer; according to the method, corn is planted in a mode of interplanting with soybeans, N fertilizer is topdressed for the first time in the small horn mouth period of the corn, N fertilizer is topdressed for the second time in the large horn mouth period of the corn, then conventional management is carried out until the corn is harvested, 40% of the application amount of nitrogen in all the fertilizers is provided by organic fertilizer, 60% of the application amount of nitrogen in all the fertilizers is provided by inorganic fertilizer, and the topdressed N fertilizer is the inorganic fertilizer. According to the planting and fertilizing method, the carbon sequestration capacity of a farmland ecosystem can be effectively improved, a good carbon sequestration effect is shown, and the corn yield is increased.

The invention discloses a fertilizing method for improving yield and quality of tobacco in a tobacco-potato rotation mode, aiming at soil nutrient characteristics after rotation, a rotation field with preceding crops being sweet potatoes is selected, soil physicochemical properties need to meet certain requirements, nitrogen (45-67.5 kg N / hm < 2 >), phosphorus (66-69 kg P2O5 / hm < 2 >) and potassium (135-202.5 kg K2O / hm < 2 >) are precisely applied, nitrogen fertilizer and potassium fertilizer are mixed and spread to furrows, the phosphorus fertilizer is singly applied to ridge bottoms in furrows, and the fertilizer is applied to the ridge bottoms in furrows. Transplanting is performed according to the line spacing of 1-1.5 m and the plant spacing of 0.4-0.6 m in the first ten days of May. According to the method, the tobacco yield, the output value and the middle-first-class tobacco proportion can be remarkably increased, agronomic characters and dry matter accumulation are optimized, chemical components of the tobacco leaves are coordinated, the potassium content is increased, the nutrient utilization rate is increased, cost is reduced, and the green agriculture concept is met.