172 results about "Diammonium phosphate" patented technology

The invention provides a method for recycling a waste lithium iron phosphate battery positive electrode material based on organic solvent soaking. The method comprises the following steps: mixing waste lithium iron phosphate positive electrode material powder and a crown ether chelating type co-dissolving agent to obtain a leaching solution; hydrogen peroxide is added into the leachate, the pH is adjusted, a diammonium hydrogen phosphate solution is added, and iron phosphate and filtrate containing lithium ions are obtained; adding sodium carbonate into the filtrate containing lithium ions, and adjusting the pH value to obtain lithium carbonate; mixing the iron phosphate with a phosphoric acid solution to obtain purified iron phosphate; and mixing the purified iron phosphate, lithium carbonate and acetylene black to obtain the regenerated lithium iron phosphate positive electrode material. According to the method for recycling the positive electrode material of the waste lithium iron phosphate battery based on soaking of the organic solvent, the leaching rate of the lithium element is effectively increased, the selectivity to other metal ions is low, and the regenerated positive electrode material of the lithium iron phosphate battery has relatively high discharge capacity and good cycling stability.

The present invention discloses a livestock and poultry manure biochar-based fertilizer, comprising the following raw materials in parts by weight: 10-42% of dilute protein solution and collagenase-modified livestock and poultry manure biochar, 20-40% of urea, 7-25% of diammonium phosphate, 7-24% of potassium chloride or potassium sulfate, 0.5-1% of modified starch, and 6-23% of bentonite. The livestock and poultry manure is selected from one of chicken manure, cow manure, and pig manure. After the biochar is modified with collagenase, the surface of the biochar has more phenolic hydroxyl groups, carboxyl groups, aldehyde groups, and hydroxyl functional groups, which are effective for NH4 + , PO4 3‑ , K + , has a stronger adsorption effect, collagenase modification makes the protein distribution more uniform, and the generated groups form a stable chemical bond with the biochar surface: it improves the dispersibility of the modified biochar in aqueous solution and reduces agglomeration; it has better chemical stability in acidic and alkaline environments.

The preparation method comprises the following steps: shredding a light fibrous plant raw material which is difficult to process to 1-5mm, adding a certain amount of lignin, fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate, carrying out hot press molding at 130-190 DEG C by using a pelletizer to prepare heavy particles with the particle size of 8-10mm, and carrying out high-temperature sintering to obtain the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material, thereby obtaining the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material and the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material. Heating the heavy particles to 400-700 DEG C in a rotary furnace, carbonizing for 1-3 hours, introducing a mixed gas of water vapor and air, and carrying out segmented activation at 850-950 DEG C-1000 DEG C to prepare high-quality activated carbon with the iodine value of more than or equal to 950 mg / g; crushing activated carbon to 140-325 meshes, mixing the crushed activated carbon with the composite glue solution, adding a proper amount of water for kneading, and forming the mixture into 2-8mm columnar particles by a hydraulic granulator or a screw extrusion granulator; through drying at the temperature of 100-300 DEG C and heat treatment at the temperature of 700-900 DEG C in a nitrogen, water vapor or anaerobic atmosphere, a basic group generated by the binder in the heat treatment has a very strong chemical adsorption effect on acid gas, later-stage modification is not needed, and excellent desulfurization and denitrification performance is achieved.

The invention relates to the technical field of surface strengthening treatment and coating preparation, in particular to a micro-arc oxidation electrolyte, a preparation method of the micro-arc oxidation electrolyte and a preparation method of an oxide ceramic coating on the surface of a magnesium-copper dissimilar metal material component. The invention provides a micro-arc oxidation electrolyte. The micro-arc oxidation electrolyte comprises a main film-forming agent, an arcing aid, a pH regulator, a corrosion inhibitor and water, the main film-forming agent comprises ammonium fluozirconate and / or potassium fluozirconate; the arcing aid comprises one or more of disodium hydrogen phosphate, sodium dihydrogen phosphate, ammonium dihydrogen phosphate and diammonium hydrogen phosphate; the corrosion inhibitor comprises one or more of hexamethylenetetramine, ammonium bifluoride and triethanolamine. The micro-arc oxidation electrolyte breaks through the problem that valve metal and non-valve metal cannot be subjected to arc discharge at the same time for micro-arc oxidation treatment in the micro-arc oxidation process.

The invention belongs to the technical field of saline-alkali soil improvement and crop planting, and particularly relates to a method for saline-alkali soil improvement and oat planting, which comprises the following steps: sowing mixed bean green manure crops in April every year, and scattering diammonium phosphate into ploughed soil before sowing; the mixed bean green manure is common vetch and S001 wild soybean; turning, pressing and returning to the field in a green manure full-bloom stage; the oats are planted every 15 days, and before the oats are planted, charcoal is scattered into the ploughed soil; the method comprises the following steps: selecting a saline-alkaline tolerant feeding oat variety, and cradling in a heading period. By sowing the mixed bean green manure, the soil composition of the saline-alkali soil can be effectively improved, the pH value of the soil and the total amount of water-soluble salt are reduced, and the content of total nitrogen, available phosphorus, quick-acting potassium and organic matter is remarkably increased, so that the method is suitable for oat planting; by sowing mixed bean green manure, turning, pressing and returning the mixed bean green manure to the field and applying biochar base fertilizer, the plant height and the yield of the oats are remarkably increased; the method is simple, effective, low in cost and suitable for large-scale popularization and application.

The invention relates to the technical field of agricultural fertilizers, in particular to a slow / controlled-release fertilizer for saline-alkali soil and a preparation method of the slow / controlled-release fertilizer. The slow / controlled-release fertilizer sequentially comprises a core layer, an inner coating, a shell layer and an outer coating from inside to outside, the core layer comprises a functional aid, diammonium hydrogen phosphate, urea, isobutylidene diurea, potassium nitrate and biochar; a shell layer contains bagasse, a compound strain and fulvic acid; the coating material is an adhesive containing montmorillonite powder; the functional additive is loaded with an organic acid and polymethacrylamide network through modified diatomite, so that the synergistic effect of sodium ion adsorption, acid-base regulation and nutrient slow release is realized; through the multi-layer structure design and the component synergistic effect, it is guaranteed that the slow and controlled release fertilizer can improve the saline-alkali soil structure in a long-acting mode, accurately regulate nutrient release and improve the stress resistance of crops, and the slow and controlled release fertilizer is suitable for efficient utilization of saline-alkali soil.

The invention discloses a special slow-release fertilizer for wheat in saline-alkali soil as well as a preparation method and application thereof, and relates to the technical field of slow-release fertilizers. The fertilizer contains various functional substances and a microbial agent, and specifically contains the following components in parts by weight: 5-10 parts of urea, 0.5-3 parts of potassium chloride, 5-10 parts of diammonium phosphate, 2-5 parts of triple superphosphate, 0.5-1 part of magnesium sulfate, 0.5-1 part of zinc sulfate, 0.2-0.5 part of boric acid, 0.2-0.4 part of resveratrol, 0.5-1 part of alginic acid, 0.3-0.5 part of fulvic acid and 1.0 part of a microbial mixed agent, and 0.1 to 0.3 part of a surfactant. According to the fertilizer, all the raw material components are reasonably compounded, the physicochemical properties of saline-alkali soil can be effectively improved while the growth requirement of wheat in the saline-alkali soil is met, and meanwhile the utilization rate of the fertilizer can be increased through the slow release effect, and damage to the environment is reduced.

The invention relates to the technical field of extraction of rare earth elements by a biological method, and provides a biological leaching method for extracting rare earth elements in fly ash by using aspergillus niger, which comprises the following steps: adding fly ash into a culture medium, sterilizing, inoculating aspergillus niger spore suspension, culturing, filtering leachate, and drying to obtain the rare earth elements, the culture medium consists of the following components in percentage by weight: 1-2% of glucose, 0.5-1.5% of a nitrogen source and the balance of water, the nitrogen source comprises peptone, yeast extract powder and diammonium hydrogen phosphate; the mass ratio of the peptone to the yeast extract powder to the diammonium hydrogen phosphate is 5: 1: (0.05-0.5). Through the technical scheme, the problem of low extraction rate of rare earth elements in related technologies is solved.

The invention provides a trichoderma fungicide for promoting growth of allium plants and application of the trichoderma fungicide, the trichoderma fungicide is a trichoderma harzianum strain MCBC3, the trichoderma fungicide and diammonium phosphate are applied in a combined mode, the application amount of the diammonium phosphate is 15 kg / mu, and the application amount of the trichoderma fungicide is 1 L / mu; existing trichoderma resource development focuses on a normal soil environment, the trichoderma harzianum MCBC3 is screened out from the saline-alkali soil for the first time, the salt resistance and the alkali resistance of the trichoderma harzianum MCBC3 directly aim at double stress of high salt and high alkali of the saline-alkali soil, and the technical bottlenecks that a traditional strain is poor in adaptability and low in survival rate in an extreme environment are solved.

This invention belongs to the field of new materials in novel tobacco products, specifically disclosing a method for improving the sensory evaluation quality of novel tobacco sheets produced using the slurry method. The method involves obtaining a slurry containing a binder and tobacco ash, adding additives to the slurry and adjusting the pH to 3-6, followed by stirring and reacting at a temperature of 50-95°C and low pressure to obtain a modified slurry. The modified slurry is then spread and dried to obtain novel tobacco sheets produced using the slurry method. The additives include additive A, additive B, and additive C. Additive A is at least one of ammonium dihydrogen phosphate, ammonium phosphate, and diammonium hydrogen phosphate; additive B is a compound having Formula 1; and additive C is a monosaccharide. The process described in this invention can selectively increase the release content of target aroma substances, thereby improving the smoking experience of the resulting novel tobacco sheets.

A method of recovery of ammonium phosphate comprises providing a start material (100) comprising struvite into a first aqueous process liquid (101) comprising monoammonium phosphate. The first aqueous process liquid (101) is mixed. Thereby the start material (100) comprising struvite is converted into monoammonium phosphate and / or diammonium phosphate in solution and a residue (103) comprising newberyite as a precipitate. The residue (103) is separated from the first aqueous process liquid (101), thereby giving a second aqueous process liquid (104) comprising monoammonium phosphate and / or diammonium phosphate. At least a part of said second aqueous process liquid (104) or a part of an aqueous process liquid (107, 112) emanating therefrom is returned into the first aqueous process liquid. Phosphoric acid (110) is added. A method for extracting nitrogen from reject water, an arrangement (1) for recovery of monoammonium phosphate and a system for extracting nitrogen from reject water is also disclosed.

The application provides a catalytic denitration agent and a preparation method thereof, and comprises the following components: a reducing base: urea 30-60 parts, ammonium carbamate 10-25 parts, ammonium carbonate 5-15 parts, ammonium bicarbonate 5-15 parts; a phase change catalytic component: ammonium dihydrogen phosphate 2-6 parts, di-ammonium hydrogen phosphate 1-5 parts, molybdate 0.05-0.5 parts, tungstate 0.1-0.8 parts, organic acid metal salt 0.1-0.8 parts, modified zeolite 1-8 parts; a functional additive: dispersant 0.2-1.0 parts, surfactant 0.1-0.6 parts, corrosion inhibitor 0.05-0.2 parts. The application constructs a multi-component complex catalytic system, and the prepared high-molecular catalytic denitration agent can realize the unity of wide-temperature high-efficiency denitration, low corrosion, low ammonia escape and high operation stability while significantly reducing the phase change temperature and energy consumption, and effectively solves the multiple problems of harsh reaction conditions, unstable efficiency and equipment corrosion in the prior art.

The application provides a quick-dissolving mixed fertilizer for improving soil and a preparation method thereof, and relates to the technical field of fertilizers.The quick-dissolving mixed fertilizer for improving soil comprises the following raw materials in parts by weight: urea 20-25 parts, diammonium phosphate 10-16 parts, potassium sulfate 12-14 parts, magnesium sulfate 3-4 parts, potassium humate 5-6 parts, lignin 4-5 parts, zinc oxide 0.1-0.3 parts, manganese sulfate 0.5-0.6 parts, ammonium molybdate 0.5-1 part, coating material 6-10 parts and water 10-12 parts.The quick-dissolving mixed fertilizer for improving soil has the advantages of balanced nutrition, good quick-dissolving property, high nutrient utilization rate and remarkable soil improvement effect.The popularization and application of the mixed fertilizer will help to improve the fertility level of farmland and promote the sustainable development of agriculture.

The present invention provides a preparation method and application of a sulfur-containing molybdenum phosphide catalyst for the hydrogenation of medium- and low-temperature coal tar. The method uses ammonium heptamolybdate as a molybdenum source, diammonium hydrogen phosphate as a phosphorus source, and silicon-surface-modified alumina as a carrier. After equal volume impregnation and drying and calcination, the catalyst is first sulfurized and then hydrogenated in a fixed-bed reactor to reduce the severity of the activation process of the molybdenum phosphide and simultaneously form a sulfur-doped molybdenum phosphide active structure to obtain a sulfur-containing molybdenum phosphide catalyst. Medium- and low-temperature coal tar is then directly introduced into the original fixed-bed reactor to carry out a medium- and low-temperature coal tar full-fraction hydrogenation refining reaction. The preparation of the sulfur-containing molybdenum phosphide catalyst and the in-situ activation in the reactor of the present invention can be completed completely within the preparation and reaction system of the existing transition metal sulfide catalyst, greatly reducing the difficulty of preparing and using the phosphating catalyst. Moreover, the sulfur-containing molybdenum phosphide catalyst prepared by the present invention can be used completely based on the existing hydrogenation system and exhibits good hydrogenation activity.

The invention relates to the technical field of fertilizers, in particular to a slow-release nitrogen-phosphorus-potassium compound fertilizer and a preparation method thereof.The preparation method comprises the steps that 1, nitrogen-phosphorus-potassium basic fertilizer particles are prepared from 35-55 parts of urea, 12-28 parts of diammonium phosphate, 28-43 parts of potassium chloride and 2-5 parts of humic acid through melting, preheating, co-melting, pelleting, cooling and screening; 2, spraying and coating with polylactic acid which accounts for 0.6-1.2% of the mass of the nitrogen-phosphorus-potassium basic fertilizer particles; 3, modified bentonite (1-3% of a silane coupling agent and 97-99% of bentonite) accounting for 1.5%-2.5% of the mass of the fertilizer is used for secondary coating, inspection and packaging are carried out, and a product is obtained.According to the slow-release nitrogen-phosphorus-potassium compound fertilizer and the preparation method thereof, the product contains a basic fertilizer core and double coating layers, the particle size is 2-4 mm, the compressive strength is larger than or equal to 25 N / particle, the fertilizer is suitable for crops such as soybeans and cotton, the utilization rate of the fertilizer can be increased by 12%-20%, and the application range is wide. The crop yield is 6-33%, the slow release effect is good, the utilization rate is high, and the yield is obviously increased.

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.

The invention discloses a rice-shrimp co-cropping-based cadmium-polluted rice field safe utilization method, which comprises the following steps that 1, a cadmium-polluted rice field to be treated is selected, the cadmium content in the cadmium-polluted rice field to be treated is 0.40-1.50 mg / kg, and the pH range of the cadmium-polluted rice field is 5.5-6.5; 2, a compound fertilizer containing urea, diammonium phosphate and potassium sulfate is applied to the cadmium-polluted rice field to be treated, and rice seedlings are transplanted according to the line spacing of 20-25 cm and the plant spacing of 10-15 cm after ploughing and uniform mixing; 3, after the seedlings turn green, young Australian freshwater lobsters with the body length of 2-5 cm are put in; 4, harvesting rice and lobsters in the rice mature period. The invention aims to significantly reduce the cadmium content in rice through the rice-shrimp co-cropping system and reduce the effectiveness of soil cadmium.

The invention discloses nutritional dredged sediment modified carbon-sequestration ecological concrete and a preparation method thereof. The carbon-sequestration ecological concrete is prepared from the following components in parts by weight: 180 to 200 parts of coarse aggregate, 70 to 90 parts of cementing material, 10 to 15 parts of nutritional modified dredged sediment, 28 to 32 parts of water and 3 to 6 parts of polycarboxylate water reducing agent, the preparation method of the nutritional modified dredged sediment comprises the step of soaking dried dredged sediment in a composite modification solution, wherein the composite modification solution consists of 80-100g / L of diammonium phosphate solution and 0.2-0.5% of chitosan solution. The dredged sediment is subjected to nutritional modification treatment through the composite modification solution, then the carbon-sequestration ecological concrete is prepared, the compressive strength, the supporting performance and the activation effect on carbon-sequestration functional microorganisms are improved, and high-value resource utilization of waste is achieved.

The invention discloses a method for preparing modified granular activated carbon from fibrous plant raw materials and activated carbon, which comprises the following steps: soaking light fibrous plant raw materials difficult to process in citric acid, shredding, adding a certain amount of sodium humate, and fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate; the preparation method comprises the following steps: preparing heavy particles with the particle size of 8mm-10mm through a hot press molding process at the temperature of 130-190 DEG C by using a granulator, carbonizing at a certain heating speed and temperature, introducing a certain amount of CO2 / N2 or air / water vapor mixed gas, and finally carrying out gradient activation at 850-950 DEG C-1000 DEG C to prepare the high-performance heavy particle active carbon. The defect that a traditional fibrous plant raw material is easily entrained by airflow to enter a tail gas system in the rotary furnace carbonization and activation process due to low density is overcome, and the light fibrous raw material can stably produce activated carbon. Meanwhile, the heavy granular activated carbon is subjected to modification treatment to prepare the modified granular activated carbon.

The invention discloses a lithium source impurity removal method, lithium phosphate and a preparation method thereof, and belongs to the technical field of battery materials. The invention solves the problem of how to provide a method for preparing high-purity lithium phosphate from a lithium source in lithium ore. The method comprises the step of removing impurities from a lithium source, and specifically comprises the following steps: roasting lithium ore, and leaching a product obtained after roasting to obtain a lithium sulfate solution; adding one or more of ammonia water, ammonia gas or liquid ammonia into the lithium sulfate solution to adjust the pH value to 8-11, and then filtering to obtain primary purified mother liquor; adding monoammonium phosphate or / and diammonium phosphate into the primary purified mother liquor, adjusting the pH value to 8-11 again, reacting under the stirring condition, and filtering to obtain secondary purified mother liquor; and adding EDTA (Ethylene Diamine Tetraacetic Acid) into the secondary purified mother liquor to obtain the lithium sulfate purified mother liquor. And adding one or more of ammonia water, ammonia gas or liquid ammonia into the monoammonium phosphate solution to adjust the pH value to 8-11, and adding the purified lithium sulfate mother liquor into the monoammonium phosphate solution to obtain the high-purity lithium phosphate.

The application discloses a kind of green repair upgrading regeneration technology of decommissioned lithium iron phosphate positive material, comprising the following steps: lithium salt and tea polyphenol are completely dissolved in solvent, to obtain reducing repairant solution;Decommissioned lithium iron phosphate positive material and direct reduction repairant solution are mixed, to obtain mixed suspension;The suspension is loaded into reaction kettle and placed in oven and heated and kept for a period of time, after cooling, precipitate is collected after washing;Precipitate is mixed with aluminum nitrate and diammonium hydrogen phosphate solution, after evaporating dry, add trace lithium salt under nitrogen atmosphere annealing, to obtain upgraded regeneration aluminum phosphate / lithium phosphate coated lithium iron phosphate positive material.The upgrading repair regeneration technology uses abundant natural green reducing repairant-tea polyphenol, and is environmentally friendly and can be recycled and reused;At the same time, the price of aluminum phosphate / lithium phosphate coating layer is low, and the electrochemical performance of lithium iron phosphate waste powder is obviously repaired and improved, which is suitable for industrialization and application.

The present application belongs to the technical field of biochar-based fertilizer, and particularly relates to a preparation method and application of a biochar-based zinc sulfate fertilizer for relieving zinc deficiency stress of calcareous soil. The biochar-based zinc sulfate fertilizer comprises a mother granule and a first coating, a second coating and a third coating successively coated on the surface of the mother granule; the mother granule is prepared by mixing and granulating urea, diammonium phosphate and potassium sulfate; the first coating comprises sulfur and bentonite; the second coating comprises zinc oxide powder, ammonium bicarbonate and ammonia water; and the third coating comprises biochar. The biochar-based zinc sulfate fertilizer can quickly and efficiently increase the effective zinc content of calcareous soil in the Loess Plateau, so as to cope with the zinc deficiency stress of the soil and promote crop growth.

The invention relates to the related technical field of measurement of the content of fluticasone propionate emulsifiable paste, in particular to a method for detecting the content of paste by adopting a high performance liquid chromatography, and particularly relates to a method for measuring the content of fluticasone propionate emulsifiable paste by adopting the high performance liquid chromatography, in particular to a method for detecting the content of fluticasone propionate emulsifiable paste by adopting the high performance liquid chromatography. Comprising the following steps: preparing a mobile phase from a diammonium hydrogen phosphate buffer solution (the pH value is 2.0-5.0), methanol and acetonitrile by adopting an octadecyl silane bonded silica gel column; and carrying out isocratic elution. According to the method disclosed by the invention, the diammonium hydrogen phosphate buffer solution-methanol-acetonitrile with a specific ratio is adopted as a mobile phase, and a chromatographic system in which an octadecyl silane bonded silica gel column and a guard column are connected in series is combined, so that the interference of oily auxiliary materials in a cream matrix is effectively eliminated, and the detection specificity and the separation effect are remarkably improved; besides, key chromatographic parameters such as column temperature, flow velocity and detection wavelength are optimized, and a scientific test sample pretreatment process is matched, so that the accuracy and reliability of a content measurement result are guaranteed.

The invention discloses a hydroxyapatite modified zinc-based composite material as well as a preparation method and application thereof. A preparation method of a hydroxyapatite-modified zinc-based composite material comprises the following steps: (1) sequentially dissolving diammonium hydrogen phosphate and calcium chloride in deionized water, adding zinc salt with the Zn < 2 + > substitution amount being 2-8% of the total molar weight of hydroxyapatite, then adjusting the pH value to 10.5-11.5, dropwise adding a phosphate solution into the mixed solution until precipitate is generated, and washing and drying to obtain Zn-HA powder; (2) zinc powder and the Zn-HA powder are mixed, aluminum oxide nanoparticles are added, and ball milling is carried out; and (3) pressing the ball-milled powder, sintering in an inert atmosphere at the sintering temperature of 400-600 DEG C, and keeping the temperature for 1-3 hours. According to the preparation method disclosed by the invention, by regulating and controlling the substitution amount of zinc in Zn-HA and a composite process, synergistic enhancement of physical bonding and chemical bonding is realized, and the bottleneck of interface bonding is broken through.

The preparation method comprises the following steps: (1) adding a lead salt and diammonium hydrogen phosphate into deionized water, stirring at room temperature, dropwise adding ammonia water into the deionized water in the stirring process, continuously stirring to obtain a mixed solution, adding the mixed solution into a hydrothermal kettle for reaction at the hydrothermal temperature of 100-200 DEG C for 10-30 hours, and filtering to obtain a filtrate; carrying out solid-liquid separation on a white product after the reaction to obtain a solid matter, drying the solid matter at 50-60 DEG C, and then carrying out high-temperature calcination to obtain lead phosphate powder; and (2) vulcanizing the lead phosphate powder to prepare the infrared detection material based on vulcanized lead phosphate. The prepared infrared detection material based on sulfurized lead phosphate is used for an infrared detector. The synthesis method has the beneficial effects that 1, the synthesis method is simple and low in cost, the used solvent is environment-friendly and green, and the synthesis method is suitable for large-scale production; and 2, the vulcanized lead phosphate disclosed by the invention has an ultra-low band gap and has the feasibility of infrared detection.

The invention relates to the technical field of chemical production, and specifically discloses a component pretreatment method for hydrogen cyanide synthesis gas. The method comprises the following steps: step S1: introducing a diammonium phosphate solution into an ammonia removal device and starting the ammonia removal device; step S2: introducing hydrogen cyanide synthesis gas containing ammonia into the ammonia removal device, causing the ammonia to react with the diammonium phosphate solution to generate diammonium phosphate, which is retained in the ammonia removal device, and the hydrogen cyanide synthesis gas to be directly discharged from the ammonia removal device; and step S3: thermally decomposing the retained diammonium phosphate solution in the ammonia removal device to generate ammonia and a diammonium phosphate solution, discharging the ammonia separately, and refluxing the diammonium phosphate solution into the ammonia removal device to reabsorb the hydrogen cyanide synthesis gas containing ammonia. The method solves the problem in a traditional hydrogen cyanide preparation process that, during absorption treatment of ammonia in the hydrogen cyanide synthesis gas, complexes generated are accumulated at the bottom of an ammonia absorption tower, and the complexes entrained in the solution discharge process affect the discharge of liquid and the discharge of ammonia from the solution.

The invention belongs to the field of fertilizers, and relates to a functional crop special formula fertilizer, which comprises the following components by weight: 70-130 parts of vinasse, 25-75 parts of corn straw, 10-30 parts of chicken manure, 3-7 parts of a microbial agent EM bacteria, 15-25 parts of an inorganic fertilizer, and 2-8 parts of a functional auxiliary material. The inorganic fertilizer comprises urea, diammonium phosphate, potassium chloride and zinc sulfate; the functional auxiliary materials comprise humic acid, alginate oligosaccharide and chitosan oligosaccharide. The special formula fertilizer disclosed by the invention can obviously increase the single-plant silique number, thousand seed weight and yield of the rape.

The invention belongs to the technical field of road engineering materials, and particularly relates to a roadbed stabilizing material with inorganic solid waste as a raw material and a preparation method thereof.The preparation method comprises the following steps that a composite drying agent is prepared, specifically, acrylic acid is cross-linked to obtain a gel block, the gel block and gravity separation metal tailing powder are stirred and crushed together, and the composite drying agent is obtained after drying and smashing; preparing a material A: slurrying flotation metal tailings, then adjusting the pH value, adding slurry PAM, dehydrating, and uniformly stirring with a composite drying agent to obtain the material A; preparing a material B: preparing the material B from steel slag powder, diammonium hydrogen phosphate and a slag powder curing agent; the material A and the material B are mixed, water is added, and the roadbed stabilizing material with the inorganic solid waste as the raw material is prepared. On the basis of the characteristics of the metal tailings prepared by different processes, good dispersion of the polyacrylic acid super absorbent resin is realized in combination with the process, and the roadbed stabilizing material with low energy consumption and high stability is obtained.

The invention belongs to the field of petrochemical engineering, and relates to a single atom and cluster coexisting Pt-Ni2P / Beta n-hexane hydroisomerization catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving nickel nitrate hexahydrate in water, dropwise adding nitric acid to adjust acidity, and adding diammonium hydrogen phosphate to obtain a Ni-P precursor solution; a Beta molecular sieve is impregnated in the Ni-P precursor solution in an equivalent volume mode, and Ni2P / Beta is prepared through air drying, drying, air calcination and hydrogen reduction; and dissolving platinum acetylacetonate in acetone to prepare a platinum precursor solution, carrying out equivalent-volume impregnation on Ni2P / Beta, carrying out air drying, drying, calcining in air, and carrying out hydrogen reduction to obtain the single atom and cluster coexisting Pt-Ni2P / Beta catalyst. The method is easy and convenient to operate and mild in condition, the hydrogen activation capacity and isomerization selectivity are remarkably improved through the synergistic effect of Ni2P and trace Pt single atoms / clusters, and efficient hydroisomerization of n-hexane is achieved while the use amount of precious metal and the preparation cost of the catalyst are reduced.

1. Name of the designed product: packaging bag (drip irrigation diammonium phosphate). 2. Use of the designed product: used for packaging products. 3. Design points of the designed product: the combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view. 5. The designed product is a planar product, and the left view, right view, top view, and bottom view are omitted.