74 results about "Phosphoric acid" patented technology

The method for preparing active carbon from bamboo raw material includes the following steps: (1). mao bamboo and waste produced by making bamboo wares are used as raw material, through cutting and screening, and screening bamboo scraps or screening bamboo scraps and making them form; (2). low temp. pyrogenic distillation carbonization of bamboo raw material in carbonization furnace, its pyrogenic distrillation carbonization temp. is 200-600 deg.C; (3). in the presence of micro oxygen placing the carbonized bamboo raw material into activating furnace and making activation by using superheatedsteam at high-temp., activating temp. is 400-850 deg.c; and (4) breaking or water washing activated active carbon, drying, sorting and sieving to obtain the invented product. Before carbonization thebamboo raw material can be soaked in mixed solution formed from zinc chloride and hydrogen peroxide or mixed solution formed from phosphoric acid and hydrogen peroxide. Its product not only possessesthe advantages of all the wooden active carbons, but also its methylthionine chloride decolouring power can be raised by 20%.

The invention relates to a method for preparing a catalyst with active metal component nonuniform distribution, which comprises the step of introducing effective quantity of at least one metal component selected from a VIII group and effective quantity of at least one metal component selected from a VIB group on a carrier by a soaking method. The method is characterized in that the soaking process comprises the following steps: firstly, mixing one or more acid selected from nitric acid, phosphoric acid, oxalic acid, citric acid, tartaric acid, pimelic acid and adipic acid, a compound of at least one metal component containing the VIB group, a compound of at least one metal component containing the VIII group, and water in sequence into a solution; secondly, using the mixed solution prepared in the first step to soak the carrier at room temperature, wherein the soaking time is between 1 and 5 hours; and thirdly, drying the carrier soaked in the second step for 2 to 10 hours at a temperature of between 60 and 160 DEG C, and roasting the soaked carrier for 2 to 5 hours at a temperature of between 400 and 600 DEG C. The method adopts the one-step soaking method to greatly simplify the preparation method of the catalyst.

Bone implant comprising a solid structure provided with an osteogenic layer comprising calcium phosphate in the form of particles (dihydrate and/or alphahemidrate) with a weight average particle size comprised between 10 μm and 250 μm.

The invention provides an organic and inorganic composite aluminium alloy non-chromium passivation treatment fluid, pertains to the field of metal materials, relates to a problem of treatment of metal material surface, and in particular to a passivation treatment fluid which can improve the corrosion resistance of the aluminium alloy surface and does not contain hexavalent chromium. The passivation treatment fluid is characterized in that organic resin such as waterborne acrylic resin, polyurethane or the like is adopted as a film forming agent, and a ferrate inorganic passivating agent, a stabilizing agent and a curing agent are added to prepare an organic and inorganic composite passivation solution; the concentration weight percentages of the components in the passivation solution are as follows: 10 to 25 percent of organic resin film forming agent of waterborne acrylic resin or polyurethane, 0.01 to 2 percent of ferrate inorganic passivating agent, 0.05 to 5 percent of sodium silicate passivation solution stabilizing agent, and 0 to 5 percent of curing agent; phosphoric acid is used for adjusting the pH value to 4-6; and the balance is deionized water. The method of roll coating, dip coating or the like is adopted for evenly coating the passivation solution on the surface of the aluminium alloy, then non-chromium passivation film with good corrosion resistance is obtained after curing at the temperature above 80 DEG C, and the passivation solution meets the requirement of environment protection.

The invention discloses a halogen-free flame retardant and a preparation method thereof and a flame-retardant polyolefin composition composed of the same. The structural formula of the halogen-free flame retardant is shown in the description, wherein the ratio of x to y to z is 1:(5-10):(1-5). The preparation method comprises the steps that melamine, phosphoric acid and piperazine are weighed and put into a high-speed mixer of which the top is provided with a liquid spray device to be stirred and mixed to be uniform, and a halogen-free flame retardant premixed material is obtained; the halogen-free flame retardant premixed material is subjected to a high-temperature dehydration condensation reaction, and the polyphosphoric acid-melamine-piperazine composite salt halogen-free flame retardant is obtained. The halogen-free flame retardant with the composite salt structure has the advantages that the halogen-free flame retardant is good in heat stability, high in phosphorus content and free of impurities such as halogens and inorganic salts, and the index of whiteness is larger than 90; few synthesizing process steps are needed, operation is simple and easy to carry out, the requirement on equipment is low, and the product yield reaches up to 80% or above; the flame-retardant polyolefin composition containing the halogen-free flame retardant has the good flame-retardant property, high water-resistant and heat-resistant properties and the excellent pigmenting property.

Extraction method for recovering metals. Phosphoric acid is contacted with an extractant suspension of solid particulate material comprising a para- or ferromagnetic material core surrounded by an outer shell of a chelating polymer whereby a metal is the solution is adsorbed on the chelating polymer, thereby removing it from the phosphoric acid solution. The metal-containing solid particulate material is magnetically separated from the solution and the metal is stripped from the solid particulate material for reuse.

A sealing material for optical elements with excellent transparency, crack resistance, and heat resistance which can produce a cured product of the sealing material and a sealed optical element are provided. The sealing material for optical elements comprising a compound with a ladder structure, which contains a repeating unit of the following formula (A) in the molecule as a major component, the compound being obtained by condensing a compound (1) shown by the formula, R¹Si(OR³)_P(X¹)_3-p, and a compound (2) shown by the formula, R²Si(OR⁴)_q(X²)_3-q, at a molar ratio of 1:9 to 10:0 in the presence of a phosphoric acid catalyst,

wherein R¹ represents a group having a reactive functional group, R² represents an alkyl group having 1 to 20 carbon atoms, R³ and R⁴ individually represents an alkyl group having 1 to 6 carbon atoms, X¹ and X² individually indicate a halogen atom, p and q individually represent an integer from 0 to 3, and l, m, and n individually represent 0 or an arbitrary integer, provided that l and n are not 0 at the same time.

The invention provides graphene-based hierarchical pore capacitor carbon and a preparation method thereof. The preparation method comprises the following steps: water-soluble sugar and a graphenes substance are subjected to a hydro-thermal reaction, a cross-linking agent is added during a reaction process, an activator is added after the reaction is complete, and then the materials are subjected to a carbonization reaction to obtain the product. The cross-linking agent is a nitrogenous foaming agent, and the activator is selected from one or more of potassium hydroxide, sodium hydroxide, zinc chloride and phosphoric acid. According to the invention, stacking and agglomeration of the graphene can be inhibited with a larger degree, the specific surface area and amount of porosity are increased, and the specific surface area utilization rate and specific capacitance are increased.

The invention discloses a production method for potassium dihydrogen phosphate, which essentially comprises: A. yellow phosphorus and oxygen combust in a combustion chamber; B. potassium hydroxide solution and/or the mother liquor for producing potassium dihydrogen phosphate absorb phosphorous pentoxide in a hydration tower under negative pressure, compress and generate a mixture of phosphoric acid and potassium dihydrogen phosphate; C. the mixture is sent to a reaction crystallizer, potassium hydroxide solution is added to the reaction crystallizer to adjust the pH value; the mixture is cooled and crystallized to separate potassium dihydrogen phosphate; the separated mother liquor is returned to the step B to be as the absorbent of the phosphorus pentoxide. The method has the essential advantages of solving the problem of large amounts of energy consumption in the process of compressing potassium hydroxide solution and producing potassium dihydrogen phosphate mother liquor of the existing production method for potassium dihydrogen phosphate, greatly reducing production cost by 600RMB per ton, saving resources and improving production environment.

The invention provides a preparation method of an LED chip and an LED chip prepared by adopting the method. The LED chip comprises an N-type semiconductor layer, a light emitting layer, a P-type semiconductor layer, a current blocking layer and an ITO (Indium Tin Oxide) transparent conducting layer covered on the current blocking layer, and is characterized in that the N-type semiconductor layer, the light emitting layer, the P-type semiconductor layer, the current blocking layer and the ITO transparent conducting layer sequentially grow on a substrate, an N electrode is prepared on the N-type semiconductor layer, a P electrode is prepared on the ITO transparent conducting layer, an SiO2 protection layer is deposited at the upper surface of the chip at the outer side of the N electrode, and an SiON anti-reflection film and an SiO2 protection layer are sequentially deposited at the upper surface of the chip at the outer side of the P electrode. According to the invention, the SiON anti-reflection film is deposited at the surface of the ITO transparent conducting layer, and the SiON anti-reflection film is etched by using a phosphoric acid solution, thereby preventing the ITO transparent conducting film from being damaged or polluted in the manufacturing process of the chip, improving the quality of the ITO transparent conducting layer, enabling the chip voltage to be reduced while improving the brightness of the LED chip, and enabling an LED to be more energy-saving and more environment-friendly.

The invention relates to polypeptide calcium superphosphate. The polypeptide calcium superphosphate is characterized by comprising 0.02-1.6% of polypeptide and 98.4-99.98% of calcium superphosphate based on total weight of the polypeptide. The invention further relates to a preparation method of the polypeptide calcium superphosphate. The method comprises directly mixing the polypeptide with the pulverized calcium superphosphate evenly to obtain the pulverized polypeptide calcium superphosphate, or palletizing the pulverized polypeptide calcium superphosphate into granular calcium superphosphate. Additionally, the invention further relates to application of the polypeptide calcium superphosphate to agriculture.

A tire tread that comprises a rubber composition based on an elastomer matrix that comprises more than 50% by weight of at least one butyl rubber, on a reinforcing filler and on a plasticizing system that comprises at least one phosphoric acid ester having a glass transition temperature below −75° C. A tire comprising such a tread has both a low rolling resistance and a strong grip on wet ground.

A drying device comprising a titano-alumino-phosphate with thermal management for the more efficient drying of objects and appliances, and its production. Further, a drying method for obtaining dried objects and appliances, as well as a method for regeneration accompanied by the desorption of water from water-containing titano-alumino-phosphate.

The invention discloses a special high-fertility green microbial soil conditioner for a paddy field, and preparation and using methods thereof. The preparation method comprises the steps of mixing 0.1%-0.8% of petrochemical powder containing more than 25% of silicon with 6.6%-8.2% of amino acid powder, and placing in a workshop for fermenting for 3 days at the temperature of above 10 DEG C; further mixing the well mixed semi-finished product with 10.2%-16.2% of phosphates, 12.7%-14.8% of dihydrogen phosphate and 12.8%-18.9% of potassium salt according to a proportion; and placing in the workshop for fermenting for 15 days at the temperature of above 10 DEG C after mixing, then further uniformly mixing with 12.8%-17.4% of ammonium sulfate, 11.4%-20.8% of peat, 9.7%-14.6% of shell powder containing calcium carbonate and 3.8%-8.2% of serpentine powder according to the proportion when sour scent (such as sour plum scent) is produced, further fermenting for 15 days, thus completing the production. The special high-fertility green microbial soil conditioner for the paddy field, disclosed by the invention, utilizes special microbes which can decompose phosphate compounds to decompose the phosphate compounds, therefore, original softness and vitality of farm land can be thoroughly restored on one hand, and on the other hand, high-quality agricultural products can be provided for consumers so as to benefit farmers.

The invention discloses an industrial sludge treatment method. The method comprises the following steps: (1) adding step: adding at least one of concentrated sulfuric acid, fuming sulfuric acid or phosphoric acid to the industrial sludge to form a sludge mixture; (2) mixing step: sufficiently mixing the sludge mixture in step (1); (3) ageing step: ageing the sludge mixture treated in step (2), and enabling the sludge mixture to fully react to convert the water in the sludge mixture into free water; (4) dewatering step: dewatering the sludge mixture treated in step (3) to separate the free water from the industrial sludge; and (5) drying step: drying the sludge mixture treated in step (4). The invention has the beneficial effects of achieving the purpose of separating the industrial sludge and the water, greatly reducing the moisture of the industrial sludge, decreasing the volume and the mass of the industrial sludge, and facilitating the subsequent treatment and utilization of the industrial sludge.

The invention discloses an aluminium product polishing method. The method is characterized by comprising the following steps: I, preparing a chemical polishing solution comprising 3-12 parts of brightening agent, 3-12 parts of corrosion inhibitor, 20-65 parts of phosphoric acid and 25-75 parts of sulfuric acid by weight, wherein the total parts by weight is 100; the brightening agent comprises 1-4 butynediol and glycerin; and the corrosion inhibitor comprises phytic acid and polyphosphoric acid; II, heating the polishing solution to 85-120 DEG C; III, soaking a dry and clean aluminium product to be polished in the polishing solution in the step II for 20-240 seconds; IV, taking out the aluminium product in the step III and then washing the aluminium product with deionized water at 60 DEG C twice; and V, taking out and then blow-drying the aluminium product in the step IV.

The invention relates to a special fertilizer and in particular relates to a fertilizer special for pasture. The fertilizer special for pasture is characterized by comprising the following components in parts by weight: 8-12 parts of urea, 12-16 parts of potassium sulfate, 14-18 parts of calcium superphosphate, 10-15 parts of special filler and 3-4 parts of mixed micro element fertilizer. According to the fertilizer special for pasture, provided by the invention, the yield of the pasture is increased by 10-20 percent, the absorption accumulation amount of nutritive indexes such as crude proteins, crude fats, molybdenum, cobalt, selenium and the like in the pasture is improved by over 10 percent, and the produced pasture is safe to utilize, comprehensive in nutrition and high in additional value.

The invention discloses a full-inorganic interior and exterior wall coating and a preparation method thereof in the technical field of inorganic coatings. The full-inorganic interior and exterior wallcoating comprises the following raw materials by weight: 20-30 parts of a potassium silicate solution, 10-25 parts of silica sol, 30-40 parts of calcium carbonate, 15-25 parts of a barium chloride solution, 10-15 parts of a sodium phosphate solution, 10-15 parts of pigment, 5-8 parts of an assistant, 25-30 parts of deionized water and 1-2 parts of a thickening agent. The silica sol is added intothe potassium silicate solution, nano titanium dioxide particles in the silica sol are uniformly dispersed in the potassium silicate solution, the nano titanium dioxide itself has excellent corrosionresistance and high hardness, and the coating contains the nano titanium dioxide, so that the corrosion resistance and strength of the coating are improved; the barium chloride solution is added intoa suspension of calcium carbonate and sodium phosphate, the sodium phosphate and barium chloride react to generate barium phosphate precipitate, the barium phosphate precipitate coats the outer surfaces of calcium carbonate particles, dissolution of calcium carbonate is inhibited, and the corrosion resistance of the coating is greatly improved.

The invention discloses stainless steel crucible paint used for smelting an aluminum-lithium alloy as well as a preparation method thereof and a coating method thereof. In raw materials of stainless steel crucible paint, a binder accounts for 40-60% of all components, wherein aggregates are Y2O3 powder with grain size of 800-1000 meshes. The preparation method comprises the following steps: (1) uniformly mixing Al(OH)3 and MgO, adding water and phosphoric acid, and stirring to heat to a temperature of 50-80 DEG C; (2) adding aluminum powder, CrO3, zinc chrome and Y2O3 powder, and uniformly stirring; and (3) performing ball-milling mixing. The coating method comprises the following steps: grinding the inner surface of a stainless steel crucible, and heating the inner surface to a temperature of 70-90 DEG C; spraying paint to the inner surface of the crucible by a spray gun, heating up to a temperature of 800-850 DEG C to preserve heat after air-drying, and cooling along with a furnace.The paint disclosed by the invention has good thermal shock property and good chemical stability.

The invention relates to a lime nitrogen multifunctional particle type soil amendment and a preparation method thereof. The soil amendment raw material comprises the following components: lime nitrogen, auxiliary materials and hot melting adhesives, wherein the auxiliary materials contain brown coal, fulvic acid and zeolite powder, wherein the hot melting adhesives contain urea, polyphosphoric acid and solid paraffin. The lime nitrogen and the auxiliary materials are mixed uniformly and are heated to 80-90 DEG D by heating, the hot melting adhesives are added and heated to 115-125 DEG C, after uniformly stirring, a steel band type granulator is used for granulation and condensation, and the lime nitrogen multifunctional particle type soil amendment is obtained. According to the invention, the composite hot melting adhesives are used as water-retaining agent and chelating agent, the auxiliary materials are used as neutralizer, activator and synergist; after continuous granulation, the product has a low water content, thereby solving the volatilization problem of the lime nitrogen; the prepared lime nitrogen multifunctional particle type soil amendment has a high biological energy and good application effect.

The invention relates to a photocatalytic self-cleaning coating as well as a preparation method and application thereof, the photocatalytic self-cleaning coating is prepared from a photocatalytic material, a nano SiO2 film forming material, a coating regulator and a solvent, and is characterized by being prepared from the photocatalytic material, the nano SiO2 film forming material, the coating regulator and the solvent, a film layer formed by coating has photocatalytic self-cleaning, anti-reflection and anti-reflection and surface hardening functions; the coating comprises the following components in percentage by mass: 0.2%-2% of a photocatalytic material, 3%-8% of a nano SiO2 film forming material, 0.01%-0.2% of a coating regulator and 90%-95% of a solvent, the photocatalytic material is a composite material of carbon, nitrogen and phosphorus doped nano TiO2 and phosphorus doped active g-C3N4, and is formed by polymerizing and activating a mixture of carbon, nitrogen and phosphorus doped nano TiO2 gel, urea, melamine and phosphoric acid and performing ultrasonic stripping in an ethanol solvent; the nano SiO2 film forming material is acidic hydrosol of methyl silicone resin and tetraethoxysilane. The photocatalytic self-cleaning coating disclosed by the invention can prevent the surface of solar cell glass from being polluted, and the light transmittance and the surface hardness are improved.

The invention discloses a smelting method for rare-earth microalloyed steel. The smelting method can be used for smelting the rare-earth microalloyed steel. By controlling the temperature, the vacuumdegree and the contents of sulfur, rare earth, oxygen, aluminum and phosphorus, high-precision and high-purity steel which is low in content of impurities and satisfies production requirements is obtained through twice smelting. In a smelting process, original vanadium (niobium, chromium, molybdenum and titanium) alloying elements in molten iron are effectively prevented from being oxidized and burnt, so that follow-up addition of vanadium (niobium, chromium, molybdenum and titanium) is reduced. Besides, the contents of sulfur, phosphorus, oxygen and aluminum in molten iron are reduced beforeadding of rare earth alloy, so that the amount of rare earth alloy which is oxidized and vulcanized is reduced, and the addition of rare earth alloy in steel is effectively reduced. Meanwhile, formation of aluminic acid rare earth, phosphoric acid rare earth or phosphoric rare earth occluded foreign substances is reduced, so that the quality of an end product is improved. By adoption of the smelting method, the smelting cost is lowered, and beneficial effects in smelting rare earth containing vanadium (niobium, vanadium, chromium, molybdenum and titanium) steel are improved.

The invention relates to a chemical fertilizer, and particularly relates to a poplar special fertilizer for and an application method thereof. The poplar special fertilizer comprises the following components by weight: 20-30% of monoammonium phosphate, 20-30% of urea, 10-12% of sulfate ammonium, 7-9% of potassium sulfate, 8-10% of calcium superphosphate, 8-10% of sulfuric acid diphosphate, 10-12%of nitrogen, 10-12% of potassium oxide and 5-7% of trace elements. The poplar special fertilizer is prepared from urea, calcium superphosphate, potassium sulfate and trace elements in different proportions determined according to the different poplar varieties. The application method is hole application, the poplar special fertilizer is applied once every year in late winter and early spring application time, the hole depth is 40 cm, and the distance between the application hole position and tree toot is increased year by year.