77 results about "Hydrogen phosphate" patented technology

The invention discloses a method for preparing feed-grade calcium hydrophosphate from raffinate acid, which comprises the following steps of: mixing alkali liquor D and raffinate acid, reacting, filtering after the reaction to obtain filtrate A and a filter cake E, and using the filter cake E for producing compound fertilizer, ammonium phosphate, superphosphate or rich calcium, and reacting the filtrate A with the calcium slurry, filtering after the reaction is finished to obtain a filtrate B and a filter cake C, returning the filtrate B to prepare an alkali liquor D, and finally drying and packaging the filter cake C to obtain the feed-grade calcium hydrogen phosphate. The method is simple in process, the value of the raffinate acid is increased, and the method is very convenient for actual production.

The application discloses a manganese iron hydrogen phosphate material and a preparation method and application thereof, relates to the technical field of battery materials. The chemical formula of the manganese iron hydrogen phosphate material is as follows: Fe x Mn (1‑x) HPO4, wherein x is 0.1-0.7.The manganese iron hydrogen phosphate material is used in a lithium battery, and the platform voltage of the manganese iron hydrogen phosphate material reaches 4.1v, the cycle life is greatly improved in comparison with a lithium iron phosphate battery, in addition, the manganese material is rich in domestic reserves, is easy to obtain, is low in price, and is small in environmental hazards, and the manganese iron hydrogen phosphate material can make up for the shortcomings of ternary and lithium iron phosphate.

The invention relates to the technical field of composite material preparation, in particular to a liquid silica gel composite material filled with hydroxyapatite nanowires and a preparation method of the liquid silica gel composite material. Calcium ions and hydrogen phosphate ions are added into a mixed solution of ethanol and oleic acid, and the one-dimensional hydroxyapatite nanowire with a hydrophobic surface is hydrothermally synthesized in an alkaline environment through a one-step method. Wherein oleic acid is used as a surface modifier to endow the material with a hydrophobic property, and nucleation and growth of hydroxyapatite nanowire crystals are adjusted by simply regulating and controlling the volume ratio of ethanol to water, so that the size of the hydroxyapatite nanowire is highly controllable from 8 microns to 50 microns. According to the invention, the biocompatibility and implantation stability of the liquid silica gel are improved. Besides, based on the enhancement effect of nanowires with different sizes on the mechanical property of the composite material, the adaptation range and the application field of the composite material are expected to be expanded, so that the requirement of the current medical material for precise and personalized development is met.

The invention discloses a method for activating manganese dioxide by using oxygen-containing anions, which comprises the following steps: placing delta-MnO2 in simulated distribution water, adding NH4 < + > to enable the concentration of the delta-MnO2 to be 2 mg / L, oscillating and incubating in a shaking table for more than 20 days, and changing the water once every 1-2 days to obtain manganese oxide with NH4 < + > oxidation capacity, the simulated distribution water contains oxygen anions with the following concentrations: 2 mM of HCO3 <->; and 0.002 mM of HPO4 < 2->. According to the method disclosed by the invention, the structure of delta-MnO2 is optimized by controlling the ratio of bicarbonate ions to hydrogen phosphate ions in water, so that the oxidation capacity of delta-MnO2 is remarkably improved, and NH4 < + > in water can be removed within a few hours instead of the original capacity without catalytic oxidation of NH4 < + >. The invention provides a feasible and economical solution for large-scale preparation of MnO2-based filter materials and water deamination engineering, and has a wide engineering application prospect.

The application discloses a method for detecting 5-hydroxymethylfurfural in a compatibility experiment of hydrocortisone sodium succinate for injection and glucose injection by HPLC. The 5-hydroxymethylfurfural is a degradation impurity of glucose. The detection method comprises the following steps: (1) preparation of a control sample solution; (2) preparation of a test sample solution; (3) chromatographic conditions; a mobile phase A is 8mmol / L potassium dihydrogen phosphate solution (pH value is adjusted to 5.0-5.1 by using 8mmol / L potassium hydrogen phosphate solution, and the solution is prepared freshly before use); a mobile phase B is methanol, gradient elution is carried out; a detection wavelength is 284nm; a column temperature is 40 DEG C; a flow rate is 1.4-1.6mL / min; and a chromatographic column is C 18 ; the application can effectively detect the content of 5-hydroxymethylfurfural, and has strong specificity and high sensitivity.

The present application relates to the field of adsorption separation technology, and particularly relates to a selective removal agent, a preparation method and application thereof. The selective removal agent contains calcium-scan double-metal layered hydroxide and diatomite, and the mass ratio of diatomite to calcium-scan double-metal layered hydroxide is greater than or equal to 0.14. The chemical formula of the calcium-scan double-metal layered hydroxide is [Ca x Sc(OH) y ]OH, x is 2-3, and y is 6-8. The selective removal agent provided in the present application has good selectivity to heat-stable salts and hydrogen phosphate, the selectivity adsorption ratio of hydrogen phosphate to heat-stable salt anions is greater than 6000, efficient separation of heat-stable salts and hydrogen phosphate can be achieved, the stability is good, the working cycle can be prolonged, and the selective removal agent is suitable for industrial popularization.

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 discloses a corrosion-resistant self-repairing polyurea coating material for ships and a preparation method thereof.The preparation method comprises the following steps that modified zirconium hydrogen phosphate is prepared, and the modified zirconium hydrogen phosphate comprises alkylated zirconium hydrogen phosphate; the preparation method comprises the following steps: preparing a UPy group curing agent UPy-IPDA-NH2 containing quadruple hydrogen bonds; and mixing the modified zirconium hydrogen phosphate with polyurea in proportion, and adding a curing agent IPDA and a UPy group curing agent UPy-IPDA-NH2 containing quadruple hydrogen bonds, which are mixed in proportion, to obtain the self-repairing polyurea coating material. The corrosion resistance of the coating material is improved by introducing modified zirconium hydrogen phosphate, the coating is rapidly repaired after being damaged by using a quadruple hydrogen bond repair technology, the service life of the coating is remarkably prolonged, and the reliability of the coating is remarkably improved.

A method for preparing a positive electrode material and related products are disclosed. The method includes mixing a lithium source with a phosphoric acid solution to form a first mixture; combining the first mixture with manganese hydrogen phosphate, an iron source, and optionally a source of an M element to form a second mixture; and drying and sintering the second mixture to obtain a lithium manganese iron phosphate (LMFP) positive electrode material. The M element is selected from transition metals other than manganese and iron, Group IIA metals, Group IIIA metals, Group IVA metals, and Group VIIA elements. The resulting LMFP material exhibits reduced gas and by-product generation, increased compacted density, lowered resistivity, and improved specific capacity and rate performance, making it suitable for positive electrode plates, batteries, and electric apparatuses.

The invention belongs to the technical field of mineral processing treatment, and particularly discloses porous magnesium oxide based on dolomite and a macro-quantity preparation method of the porous magnesium oxide. The method comprises the following steps: crushing dolomite ore, and carrying out solid-phase reaction on the crushed dolomite ore and ammonium dihydrogen phosphate to obtain a mixture containing MgNH4PO4 and calcium phosphate; then selectively dissolving out magnesium in the mixture by using an acetic acid solution to obtain magnesium-rich filtrate and calcium hydrophosphate filter residues; mixing the magnesium-rich filtrate with ammonium bicarbonate for reaction to obtain basic magnesium carbonate precipitate and an ammonia-containing solution; sequentially carrying out first heat treatment and second heat treatment on the basic magnesium carbonate precipitate to obtain the porous magnesium oxide. According to the method, the porous magnesium oxide is successfully prepared on a large scale by taking the dolomite with large reserves and low cost as a direct raw material; the porous magnesium oxide also has the advantages of hierarchical pore structure and large specific surface area.

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.

The application discloses a kind of preparation and application of N, P doped titanium carbide nano quantum dot fluorescent probe, belong to fluorescence sensing technical field.The application uses ethylenediamine, diammonium hydrogen phosphate as nitrogen source and phosphorus source respectively to synthesize the N, P doped Ti3C2MXene quantum dot of blue light emission, and the N, P doped Ti3C2MXene quantum dot has good stability and high quantum yield.Based on the fact that tetracycline (TC) can quench the fluorescence of N, P doped Ti3C2MXene quantum dot fluorescent probe, the N, P doped Ti3C2MXene quantum dot fluorescent probe is used for tetracycline detection.The fluorescent probe has high selectivity, wide linear range and high sensitivity, providing a new method for tetracycline detection in milk.

The invention discloses a raw material stirring device for calcium hydrophosphate production and processing, and relates to the technical field of stirring devices. Comprising a sleeve and a transmission shaft, a first magnetic component and a reciprocating cylinder are sequentially mounted on the sleeve, a second magnetic component is arranged on one side of the reciprocating cylinder, and a first magnetic component and a second magnetic component are arranged on the other side of the reciprocating cylinder. A first stirring blade is rotationally arranged on the other side of the reciprocating barrel. Through vertical movement of the first stirring blades, raw materials at different depths in the tank body can be continuously stirred, a mixing dead zone and a precipitation layer are effectively eliminated, it is ensured that the materials are uniformly distributed in a three-dimensional space, and the device is suitable for a mixing system containing a surfactant. The first stirring blades and the second stirring blades act together to generate efficient turbulent flow and a reverse shear flow field, so that agglomerated particles can be quickly scattered, and the mixing efficiency and the uniformity are further improved, so that the mixing quality and the reaction efficiency are doubly improved.

The utility model relates to the technical field of tail gas treatment, and discloses an ammonia gas recovery treatment device for diammonium hydrogen phosphate production, which comprises a tower body, the bottom of the tower body is fixedly connected with a base, the top of the base is provided with a circulating component, and the middle of the base is provided with a collecting component; the circulating assembly comprises a water tank, the water tank is fixedly connected to the top of the base, a water pipe is fixedly connected to the middle of the water tank, and a circulating pump is arranged in the middle of the water pipe. According to the utility model, water in the water tank is sprayed out from the spray head through the water pipe and the spray pipe by the circulating pump, so that the contact area with ammonia gas is increased, the driving motor drives the spiral stirring blade to rotate, the collected ammonia water is stirred, the ammonia gas can be more fully absorbed by the water, and then water vapor is separated out through the gas-liquid separator; the flange plate is externally connected with the ammonia gas collecting tank, so that the ammonia gas recycling efficiency is further improved.

The application discloses a novel modified biochar and a preparation method and application thereof, and preparation comprises the following steps: placing calcium-rich solid waste raw materials in a crusher for crushing treatment, fully mixing the biochar with the removed dissolved organic matter at a mass ratio of 1:(1-4), adding pure water at a mass-volume ratio of 1g:(60-100)mL, and adding diammonium hydrogen phosphate and ammonium dihydrogen phosphate at a calcium-phosphorus ratio of 1:(2.5-3.34); all raw materials are placed in a ball mill jar, the mass ratio of the raw materials to zirconia balls before ball milling is 1:(10-15), and ball milling is carried out at a rotating speed of 250-600 r / min for 6-12 h; the biochar slurry after ball milling is moved to a centrifuge tube, and centrifugation is carried out at a rotating speed of 5000 r / min for 10 min; the solid precipitate is washed with pure water for 3 times to remove excessive phosphate, and is placed in an oven for drying, so as to obtain the ball-milled novel modified biochar; the novel modified biochar has the advantages of simple synthesis method, low energy consumption, easy separation by using a centrifuge, and high adsorption performance on heavy metals.

A fire extinguishing liquid is described which includes one or more of a phosphate, hydrogen phosphate or dihydrogen phosphate salt; and a sulphate salt. The fire extinguishing liquid contains no, or substantially no, hydrogen carbonate salts. The liquid finds use in the extinguishment of fires, including battery fires.

The invention discloses a method for preparing phosphate concentrate, calcium hydrophosphate and magnesium ammonium phosphate by leaching and calcining phosphate tailings with dilute phosphoric acid. The method comprises the following steps: carrying out acid leaching on the phosphate tailings calcined under a certain condition by adopting the dilute phosphoric acid, and filtering to obtain the phosphate concentrate and leachate rich in phosphorus, calcium and magnesium; ammonium hydroxide is added into the leachate, calcium hydrogen phosphate and magnesium ammonium phosphate are obtained through fractional precipitation, and the quality of the obtained product meets the corresponding national standard requirement; according to the method, dilute phosphoric acid is used for leaching the calcined phosphate tailings, magnesium oxide and calcium oxide in the calcined phosphate tailings can be leached out in a high-selectivity mode, and other inorganic impurities cannot be introduced; by producing high-quality phosphate concentrate, calcium hydrophosphate and magnesium ammonium phosphate, efficient utilization of phosphate tailings is realized.

The invention discloses a method for preparing porous hydroxyapatite by regulating and controlling a biochar source soluble organic matter, which comprises the following steps: preparing low-temperature pyrolytic biochar, uniformly mixing and ball-milling the low-temperature biochar and pure water in a ball mill, then carrying out ultrasonic treatment in an ultrasonic machine, and filtering to obtain a biochar material and a soluble organic matter extracting solution; placing the calcium source powder and the soluble organic matter extracting solution in a ball mill together, adding ammonium dihydrogen phosphate at the beginning of ball milling, adding diammonium hydrogen phosphate after ball milling for 2-3 hours, and carrying out ball milling for not less than 6 hours to obtain porous hydroxyapatite slurry, washing, filtering, drying and grinding to obtain the porous hydroxyapatite. According to the method, DOM in the low-temperature biochar is fully utilized for synthesis of HAP, calcium source powder can be calcium source solid waste, resource utilization of the calcium source solid waste is achieved, hydroxyapatite prepared through the method has the advantages of being easy to operate, low in cost and high in purity of obtained products, and the method has important significance in effective recycling of resources.

This invention discloses a full leaching process for waste lithium iron phosphate (LFP) black powder, belonging to the field of LFP black powder recycling. The process includes the following steps: S1, raw material pretreatment: obtaining pretreated black powder with a moisture content ≤1%; S2, preparation of an organic acid leaching agent; S3, first iron-phosphorus leaching; S4, filtering the reaction system of step S3 using a 0.22μm plate and frame filter to obtain an iron-phosphorus leaching solution and lithium-containing solid filter residue; S5, subsequent lithium leaching; S6, filtering the reaction system of step S5 using a 0.22μm plate and frame filter to obtain a lithium leaching solution and solid residue; S7, adjusting the pH of the iron-phosphorus leaching solution to 3.5–4.0 with ammonia water, removing impurities, and crystallizing to obtain battery-grade iron phosphate; concentrating the lithium leaching solution under reduced pressure at 45–50℃, adding diammonium hydrogen phosphate to precipitate lithium, and crystallizing to obtain battery-grade lithium phosphate. This invention involves no strong acids or toxic reagents throughout the entire process, resulting in minimal equipment corrosion.

The invention discloses a preparation method of a magnetic hydroxyapatite material and application of the magnetic hydroxyapatite material in the technical field of environmental governance materials, and the preparation method comprises the following steps: dissolving calcium nitrate tetrahydrate in deionized water as a calcium source at normal temperature by using a hydrothermal method which is simple to operate; the preparation method comprises the following steps: dissolving diammonium hydrogen phosphate in water to serve as a phosphorus source, mixing and stirring the two solutions, adding ferroferric oxide nanoparticles, adjusting the pH value with ammonia water, stirring and reacting, heating in a drying oven for a period of time, cooling to room temperature, and washing and freeze-drying the precipitate to obtain the magnetic hydroxyapatite material. The magnetic hydroxyapatite can be used for adsorbing micro-plastics in a water body. The material has the advantages of high adsorption capacity, high removal efficiency and easiness in recovery.

The invention discloses an additive for increasing the crystal size of calcium hydrophosphate and application of the additive, and belongs to the technical field of inorganic chemical industry. According to the additive for increasing the crystal granularity of the calcium hydrophosphate, the additive is at least one of cetylpyridinium bromide, cetyltrimethylammonium bromide and dodecyl benzyl dimethyl ammonium bromide. In addition, the invention also provides an application of the additive in increasing the crystal particle size of calcium hydrophosphate. The additive for increasing the crystal granularity of the calcium hydrophosphate, provided by the invention, can increase the granularity of the calcium hydrophosphate by more than 50%.

The invention discloses a method and a device for preparing hydrophosphate based on battery powder lithium extraction slag, an operation mode of multi-stage series countercurrent leaching-segmented precise feeding-deep impurity removal and purification-closed cycle crystallization is adopted, a leaching agent adopts first-stage and second-stage segmented feeding in the leaching process, the mass transfer efficiency is greatly enhanced, and the leaching efficiency is improved. The leaching effect of the leaching agent is maximized, the leaching rate of phosphorus is remarkably improved, the problems of low phosphorus leaching rate and high product impurity content in the prior art are effectively solved, no extra wastewater is generated in the whole technological process, the leaching agent and the crystallization mother liquor are in dynamic circulation in the whole production process, and the production cost is reduced. The method has the advantages that recycling of water resources and residual effective components is achieved, environmental protection and economic benefits are achieved, the problems that in the prior art, the technological process is complex, and cost is high are effectively solved, the industrial-grade hydrophosphate product meeting the industrial standard can be directly prepared from the battery powder lithium extraction slag, and the method is suitable for industrial production. And all-component high-value recovery of the waste lithium iron phosphate battery is realized.

The utility model discloses a bone source calcium hydrogen phosphate recovery system in a gelatin production process and belongs to the technical field of gelatin production. Comprising a neutralization tank, a neutralization drain pipe, a submersible pump for recycling a sedimentation tank, a first self-suction tank, a second self-suction tank, a first centrifugal pump, a first sedimentation tank, a second centrifugal pump, a second sedimentation tank, a buffer tank, a third centrifugal pump, a fourth centrifugal pump, a water film dust remover, a calcium hydrophosphate recycling pipeline, a blow-off pipe and the sedimentation tank, while calcium hydrophosphate is recycled in a multi-stage precipitation mode, a sufficient and stable water source is provided for the water film dust remover, the product yield is improved, the water cost is saved, meanwhile, graded recycling can be conducted on the precipitation pond and the precipitation tank, and the situation that water of the water film dust remover is cut off due to calcium hydrophosphate recycling is avoided; and in the aspect of environmental protection, clear water without solids is discharged to an environmental protection workshop, so that the pressure of the environmental protection workshop is reduced.

This invention relates to the field of catalyst technology, specifically to a solid acid catalyst for post-etherified C4 olefin trimers, its preparation method, and its application. The catalyst comprises at least a metal salt active component, diammonium hydrogen phosphate, and a catalyst support; the metal salt active component includes aluminum sulfate and ferric sulfate; the molar ratio of phosphate ions in the diammonium hydrogen phosphate to metal cations in the metal salt active component is nPO4. 3‑ / n(Al 3+ +Fe 3+ The total amount of metal salt active components and diammonium hydrogen phosphate in the solid acid catalyst accounts for 5-10% of the total mass of the solid acid catalyst. By optimizing the formulation and process of the solid acid catalyst, the problems of easy mudding and clogging of existing solid phosphoric acid catalysts, easy carbon deposition and deactivation of molecular sieve catalysts and complex process operation, and high cost of ionic liquid catalysts are effectively solved, so as to better meet the production and application needs of post-etherified C4 olefin trimers.

A process for modifying a surface chemistry of a cathode active material includes providing a powder of the cathode active material, wetting the powder of cathode active material with an efficient amount of a solution to form a mixture, and baking the mixture to obtain a surface modified cathode active material, wherein: the cathode active material has a formula of LiNixMnyCo1-x-yO2, wherein 0≤x≤1, 0≤y≤1, and 0≤x+y≤1; the solution comprises a solvate and a solvent; and the solvate comprises H3BO3, H3PO4, a phosphate salt, a hydrogenphosphate salt, a dihydrogenphosphate salt, or a combination of any two or more thereof.

The invention discloses a comprehensive recycling method of phosphate tailings, which belongs to the technical field of comprehensive utilization of wastes and comprises the following steps: crushing the phosphate tailings, mixing the crushed phosphate tailings with a phosphoric acid solution for reaction, filtering after the reaction is finished, and drying filter residues to obtain phosphoric acid leachate and fertilizer-grade calcium hydrogen phosphate, thereby completing comprehensive recycling of the phosphate tailings. The method provided by the invention realizes the separation of calcium and magnesium elements in the phosphate tailings, and the obtained phosphoric acid leachate can further separate and recover magnesium resources, so that the calcium and magnesium resources in the phosphate tailings are effectively utilized, meanwhile, no solid phosphogypsum is generated, no secondary solid waste discharge is realized, and the method is environment-friendly.

The invention discloses a doped iron hydrogen phosphate precursor and a preparation method and application thereof.The preparation method of the doped iron hydrogen phosphate precursor comprises the steps that a solution containing a phosphorus source and a solution containing an oxidizing agent are added into a solution containing an iron source and a metal doping source respectively, a reaction is conducted, and a reaction solution is obtained; and adjusting the reaction liquid to be acidic, aging, and carrying out solid-liquid separation to obtain the doped iron hydrogen phosphate precursor. According to the preparation method, the metal doping source is added into the reaction liquid for preparing the iron hydrogen phosphate precursor to prepare the doped iron hydrogen phosphate precursor, so that the distribution uniformity of metal doping ions in the iron hydrogen phosphate precursor is effectively improved, and the problem of relatively poor ion uniformity of the iron hydrogen phosphate precursor prepared by a solid-phase reaction method is effectively solved; the intrinsic electron conductivity of the material and the diffusion rate of sodium ions are further improved, so that the electrochemical performance of the material is favorably improved.

Process for recovering a precious metal from a plating layer. This application relates to a process for recovering a precious metal present in a plating layer covering all or part of the surface of an object, comprising (i) contacting said object with an aqueous solution having a pH of 4 to 11 and comprising from 0.01 mol.L-1 to 1 mol.L-1 of dihydrogen phosphate and / or hydrogen phosphate ions, and from 0.1 mol.L-1 to 2 mol.L-1 of hypochlorite ions, such that at least a portion of the precious metal present in the plating layer dissolves in the aqueous solution, and (ii) separating the solution obtained at the end of step i) from the object, so as to recover, on the one hand, the object, and on the other hand, the aqueous solution containing the precious metal. Figure for abstract: none

The application belongs to the technical field of pharmaceutical preparations, and particularly relates to a sertraline citrate tablet and a preparation method thereof. According to weight parts, the sertraline citrate tablet comprises the following raw materials: sertraline citrate 30-55 parts, sodium hydrogen phosphate 5-10 parts, modified hydroxyapatite 3-8 parts, a filling agent 25-60 parts, a binding agent 1-5 parts, a lubricant 0.5-1.5 parts, a disintegrating agent 6-10 parts, and a synergist 0.2-1 part. The preparation method of the modified hydroxyapatite is as follows: under an inert gas atmosphere, dopamine hydrochloride, 4-(2-methylpropenyl) carbonyl oxy benzene boronic acid and ethanol are added into Tris-HCl buffer solution, then copper sulfate pentahydrate, hydrogen peroxide and hydroxyapatite are sequentially added, oscillation is carried out, filtration is carried out, then water and ethanol are sequentially used for washing, vacuum drying is carried out, and the modified hydroxyapatite is obtained. The sertraline citrate tablet has high hardness, good dissolution rate and stability.

The invention discloses a zinc-doped high-toughness injectable organic-inorganic composite bioactive material and a preparation method thereof.The composite bioactive material comprises a water aqua and powder, the water aqua comprises water-soluble calcium salt, water-soluble phosphate, polyacrylic acid, polyaspartic acid, polyvinylpyrrolidone, citric acid and deionized water, and the powder comprises water-soluble calcium salt, water-soluble phosphate, polyacrylic acid, polyaspartic acid, polyvinylpyrrolidone, citric acid and deionized water. The powder comprises calcium hydrophosphate, tetracalcium phosphate and a zinc source. The zinc element is added, so that proliferation, differentiation and the like of osteoblasts are remarkably promoted, unexpected osteogenic activity is shown, all excellent mechanical properties in an existing bioactive material are completely reserved, and the properties include but not limited to coagulation time, compressive strength, toughness, injectability and the like; furthermore, the addition of zinc has no negative effects.