63 results about "Apatite" patented technology

The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.

This invention relates to a method for preparing copper-modified lead apatite. The method includes: sequentially subjecting precursor materials to a first hydrothermal process and a second hydrothermal process, followed by calcination to obtain copper-modified lead apatite; the precursor materials include liquid-phase precursor materials or solid-phase precursor materials; the liquid-phase precursor material is obtained by mixing lead salt, copper salt, phosphorus source, pH adjuster, chelating agent, and solvent; the solid-phase precursor material is obtained by mixing copper compound and lead compound; the temperature of the first hydrothermal process is lower than the temperature of the second hydrothermal process. The preparation method provided by this invention, by treating rationally designed raw materials using a specific hydrothermal process, can obtain copper-modified lead apatite with extremely low impurity content, which is beneficial for broadening the application fields of copper-modified lead apatite and improving its performance.

The invention provides a method for enriching rare earth ore in low-grade apatite. The method comprises the steps of ore pretreatment, graded desliming, three-time graded flotation and four-time rare earth rough concentrate concentration. According to the method, efficient mineral dissociation is achieved by optimizing the pretreatment process, an environment-friendly zinc phosphate complex is adopted to replace lead nitrate to serve as a modification activating agent, the flotation selectivity and the recovery rate of the rare earth minerals are improved by combining the synergistic effect of a specific regulator and a collecting agent, and finally the rare earth minerals with the raw ore grade being 0.15%-0.50% are enriched to the grade being 11.65%-12.55%; and the recovery rate reaches 85% or above, meanwhile, the production cost is reduced, the lead pollution risk is eliminated, and green and efficient utilization of low-grade apatite associated rare earth resources is achieved.

The invention discloses demineralized dentin remineralization mouthwash based on cp20k-p3 bionic polypeptide and an application of the demineralized dentin remineralization mouthwash. The mouthwash is prepared by mixing the polypeptide cp20k-p3 (the amino acid sequence is CNQKHPCWRRHGKKHRGLHRKFHGNACNC) derived from barnacle mucin 20K, an aqueous solution of calcium salt and an aqueous solution of phosphate. The polypeptide can specifically recognize and adsorb an organic matrix exposed on the surface of demineralized dentin, guide hydroxyapatite crystals to directionally deposit on the demineralized part of the dentin, and form a compact mineralized layer similar to a natural structure on the surface of the dentin. Compared with a calcium phosphate mixed aqueous solution without cp20k-p3, the preparation method is simple and convenient to operate, can form a compact mineralized layer with the surface of the re-demineralized dentin, and has excellent stability in an oral environment.

The application discloses a method for recovering apatite and amorphous SiO2 by using ultrasonic enhanced cyclone separation technology, and belongs to the field of apatite and amorphous SiO2 separation and extraction. According to the gypsum crystal reconstruction theory, the gypsum phase and non-gypsum phase components in phosphogypsum are deeply separated, the obtained phosphogypsum tailings are subjected to ammonia immersion and solid-liquid separation, and an ammonium humate solution and tailings rich in SiO2 and apatite are obtained. The application takes the phosphogypsum tailings as raw materials, and uses ultrasonic waves and dispersants to depolymerize the silicon dioxide monomers and apatite, so that the two phases are completely dissociated. In this state, the SiO2 is gradually deposited at the bottom through cyclone separation, and the apatite flows out from the top, and then apatite concentrate and SiO2-rich phase are obtained, wherein the grade of SiO2 is greater than or equal to 95%, and the grade of apatite is greater than or equal to 90%. The technology can not only realize the effective separation of silicon dioxide and apatite in phosphogypsum, but also help realize the comprehensive utilization of phosphogypsum resources.

The application discloses a kind of functional gradient type road base materials based on modified slag and its laying method, belong to road engineering material technical field.The material uses double-layer gradient structure design: lower bearing layer is made of high-temperature molten vitrification processing coarse granularity domestic waste incineration slag aggregate and cementing material, realizes permanent sealing and high-strength bearing of heavy metal;Upper functional layer uses phosphate surface modified fine particle slag, in-situ generates hydroxyapatite (HAP) functional coating, cooperates with natural aggregate and cementing material to build heavy metal dynamic adsorption barrier, uses layer sequence construction technology of first down and then up when laying, forms lower solid load bearing, upper interception purification functional gradient system.The application constructs the double stabilization mechanism of source vitrification solidification-process apatite adsorption, not only significantly improves the mechanical properties and durability of road base, but also realizes the resource utilization of domestic waste incineration slag.

Gel-based subterranean formation hardening compositions and methods thereof may comprise introducing an aqueous carrier fluid comprising a gel and an ammonium phosphate salt into a subterranean formation comprising a carbonate mineral; and interacting the carbonate mineral with the ammonium phosphate salt to convert at least a portion of the carbonate mineral into a hydroxyapatite mineral; wherein the subterranean formation has an increased hardness after forming the hydroxyapatite mineral.

This invention relates to the field of soil remediation and improvement technology, specifically disclosing a soil remediation and improvement agent for contaminated soil and its preparation method. The remediation and improvement agent comprises the following raw materials in parts by weight: modified remediation masterbatch, hydroxyapatite, sodium bentonite, mineral-derived potassium humate, and polyaspartic acid. The preparation method includes: firstly, using lignin to disperse and fix an iron source on biochar and zeolite to obtain a modified carrier; then, using a colloid formed from sodium alginate and silane, adhering modified lithium titanate and modified bismuth tungstate to the carrier surface, and then applying a low-temperature compound bacterial agent to obtain the modified remediation masterbatch; finally, mixing the masterbatch with other raw materials and granulating. The improver prepared by this invention utilizes the synergistic effect of multiple materials to simultaneously adsorb heavy metals and degrade organic pollutants, and the process is controllable, making it suitable for agricultural applications.

The invention relates to the technical field of paleoclimate quantitative reconstruction, in particular to a method for rapidly and quantitatively reconstructing paleoclimate based on soil weathering indexes. The method comprises the following steps: selecting a paleo-temperature sensitive index and a paleo-rainfall sensitive index according to data of a paleo-soil sample; establishing a function based on a Chinese modern soil profile for reconstructing paleoclimate; a McLenna method is adopted to correct CaO *, and interference of carbonate and apatite on a result is eliminated; and substituting into the transfer function, correcting the influence of the dust deposition rate difference through a thickness weighted average method, and outputting the results of the annual average precipitation and the annual average temperature, thereby realizing the reconstruction of the paleoclimate.

A method for recovery of rare earth elements from apatite mineral comprises dissolving (S10) of apatite mineral of magmatic origin in an acid comprising hydrochloric acid. The dissolving results in a first liquid solution comprising phosphate, calcium and chloride ions, rare earth elements, arsenic and iron. The arsenic and any ferric iron are removed. The first liquid solution is treated (S20) into a second liquid solution by extracting (S22) of a major part of the phosphate ions with an organic solvent. The treating of the first liquid solution into the second liquid solution further comprises partially neutralizing (S75) a raffinate resulting from the extracting of a major part of the phosphate to a pH > 1.5, causing precipitation of phosphates of rare earth elements, and filtering (S76) the precipitated phosphates of rare earth elements from the raffinate.

The application is a divisional application of 2022109403727. The application discloses a palygorskite-based mineralized water agent, which has a core-shell structure, and the content of the core is 75-90 wt%, wherein the core is a particle composed of the following components: palygorskite, lithia tourmaline, medical stone, serpentine, wood fish stone, hexacyclic stone and montmorillonite; the shell is composed of the following components: hydroxyapatite, tyrosine and methionine. Compared with the prior art, the mineralized water agent can not only increase beneficial substances such as strontium, selenium, zinc and lithium in drinking water, but also reduce fluorine, iron and manganese.

The invention discloses a hydroxyapatite microsphere as well as a preparation method and application thereof, and belongs to the technical field of medical equipment materials. D10 of the hydroxyapatite microspheres is larger than or equal to 25 micrometers, D50 ranges from 30 micrometers to 40 micrometers, D90 is smaller than or equal to 55 micrometers, the span value span is smaller than or equal to 0.70, and the sphericity degree is larger than or equal to 0.92. The preparation method comprises the following steps: preparing monodisperse oil-in-water drops from a dispersed phase and a continuous phase; adjusting the pH value in the monodisperse oil-in-water drops by using ammonia gas so that the monodisperse oil-in-water drops are subjected to an aging reaction, and drying to obtain a precursor; and removing an oil phase in the precursor and sintering. Wherein the dispersion phase is a water phase comprising a calcium source, a phosphorus source and amino acid; the continuous phase is an oil phase comprising a surfactant. The preparation method is simple, and the sphericity and particle size distribution of the hydroxyapatite microspheres can be effectively controlled. And the obtained product has the advantages of high sphericity, uniform morphology and narrow particle size distribution, and is suitable for the fields of skin soft tissue filling, bone repair and the like.

The invention provides a multi-source geochemical data-based tectonic environment probability discrimination method and equipment, and relates to the technical field of geological prospecting, quality screening is performed on total rock, zircon and apatite data according to metadata of a target igneous rock sample, the influence of original data quality difference on a discrimination result is reduced from a data source, and the discrimination efficiency is improved. The screened total rock element vector, the screened zircon point location data and the screened apatite point location data are subjected to detection limit uniformization through metadata, so that the comparability of cross-batch and cross-laboratory is improved, and false correlation is inhibited; and feature calculation and feature aggregation are performed on the transformed total rock element vector, the transformed zircon point location data and the transformed apatite point location data, so that the problems that multi-point location data fusion is not standard and cross-evidence consistency cannot be quantified are solved, and the judgment stability of a construction environment is improved from multiple aspects.

The invention discloses a method for determining the content of apatite in deep-sea sediment, and belongs to the technical field of component analysis. According to the method disclosed by the invention, each mineral in the sediment is analyzed through an X-ray diffraction spectrum and an infrared spectrum, and the content of apatite in the sediment is finally and accurately obtained through data processing. The apatite content determined by the method has an obvious positive correlation relationship with the P2O5 and CaO content in the sediment, which shows that the determination method has high accuracy, and the method is adaptable to sediment samples in different sea areas. The determination method disclosed by the invention has important significance in analyzing the characteristics and content of rare earth element occurrence minerals in the deep-sea sediments, finding out the metallogenic characteristics and formation mechanism of the deep-sea sediments and dressing, smelting and utilizing the deep-sea sediments.

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 present invention provides a novel and environmentally friendly particulate material that exhibits a smoothness like that of urethane particles. Hydroxyapatite-supporting porous silica particles according to the present invention have hydroxyapatite supported on the surface and in the pore interiors of spherical porous silica particles and have a circularity of at least 0.760.

The present invention relates to a putty formulation suitable for use as a bone void filler. The putty formulation comprises granules comprising a macroporous cement composition comprising hydroxyapatite and β-calcium pyrophosphate. The porosity of the composition is 60-80 vol%, the average particle size of the granules is 50-800 µm, and the portion of granules in the putty formulation is 25-50 wt%.

This invention discloses a flotation process for recovering apatite from iron ore tailings, belonging to the field of mineral processing technology. It includes the following steps: 1. High-gradient magnetic separation is applied to the iron ore tailings to recover and remove magnetic iron-bearing minerals. The removed iron-bearing minerals are returned to the main iron ore processing flow. The tailings enter a sluice to remove large gangue minerals, and then enter a thickener for concentration. 2. The underflow product from the thickener is subjected to sulfide mineral flotation and gypsum flotation to remove easily interfering impurities, followed by apatite collecting direct flotation to obtain apatite concentrate. 3. The apatite concentrate is subjected to ultrafine grinding for liberation and selective mudification of impurities, followed by closed-circuit apatite cleaning to obtain a qualified apatite concentrate product. This invention can achieve good recovery and utilization of apatite from iron ore tailings and has great economic feasibility.

The invention belongs to the crossing field of tectonic geology and isotope chronology, and particularly relates to a method for determining the deformation time limit of a ductile shear zone, which comprises the following steps: step 1, field geological survey and sample collection; step 2, sample preparation and microscopic structure research; step 3, apatite formation cause identification; step 4, micro-cell U-Pb dating test is carried out; and step 5, data processing and analysis. According to the method disclosed by the invention, the deformation age of the ductile shear zone in the granite body is rapidly and accurately obtained through apatite U-Pb micro-area analysis.

The invention discloses a microbial ardealite mineralization method based on electric field induction. The method comprises the following steps: S1, mixing a mineralized dry material, a microbial bacterial liquid and a curing agent containing calcium and magnesium ions, and dispersing to prepare ardealite mineralized primary pulp; s2, applying an electric field in the mineralization process of the phosphogypsum mineralization primary pulp, inducing ions to directionally migrate under the action of the electric field, and promoting the sediment to cure harmful substances; an electric field is applied to the microbial phosphogypsum mineralization process to induce directional movement of anions and cations in phosphogypsum mineralization primary pulp, under the tendency of relative movement of the anions and cations, the anions and cations are promoted to be combined to generate hydroxyapatite, struvite and calcium carbonate precipitates, and the purpose of promoting generation of phosphogypsum mineralization products is achieved; when the phosphogypsum slurry is solidified, cations move towards the cathode, and heavy metal ions are mostly high-valence cations, large in radius and prone to being complexed by SO4 < 2-> in the phosphogypsum slurry, so that compared with calcium and magnesium ions, the heavy metal ions move slowly and are easily solidified by precipitates, and the solidification efficiency of the heavy metal cations is improved.

The application provides a preparation method and application of a nanoscale porous hydroxyapatite material, and belongs to the field of inorganic material synthesis. The hydroxyapatite material with high crystallinity, nanoscale, microspherical morphology and multi-level pore structure of microporous and mesoporous is obtained through one reaction of a calcium source suspension liquid containing calcium acetylacetonate and a phosphorus solution containing a trisalt of phosphoric acid through a microchannel reactor, and then secondary crystallization through high-temperature calcination. The material particle size is 30-90nm, the pore size range is 0.5-50nm, heavy metal ion adsorption can be realized, the adsorption rate reaches more than 93.0% when the heavy metal ion concentration is 100-500mg / L, is 1.21 times of the adsorption rate of a hydroxyapatite material prepared by a simple chemical precipitation method, and has a wide application prospect in the field of heavy metal ion adsorption.

This invention discloses a method for predicting hydrocarbon charging based on the superposition of ancient and modern structures, comprising the following steps: Step 1: Outputting a current structural contour map and an uncertainty thermogram that combine spatial accuracy and uncertainty quantification; Step 2: Constructing a structural change index to quantify the destruction / preservation weights of each phase on the trap; Step 3: Integrating apatite fission track and (U-Th) / He thermochronological data to output a paleostructural contour map with error distribution and a paleoriver probability field; Step 4: Generating a three-dimensional volume of sand body probability distribution, coupling a digital core pore network model to simulate the critical threshold for hydrocarbon charging, and generating a sand body connectivity index map to constrain the distribution of high-quality reservoirs; Step 5: Superimposing multiple parameters in the superposition area of ​​ancient and modern structural high points, applying the SHAP algorithm to analyze the contribution of reservoir-controlling elements to focus on the main controlling factors and lock in favorable target areas for hydrocarbon enrichment; Step 6: Generating a three-dimensional probability volume of favorable target areas and combining it with an economic evaluation module to generate an exploration priority ranking.

The present invention relates to a composition or material, in particular a catalytically active composition or material, comprising - permanently polarized hydroxyapatite and - vaterite and / or vaterite-like material. Further, the present invention relates to a method for producing said composition or material, a composition or material obtained or obtainable by said method and the use of said composition or material.

The invention discloses an ytterbium silicate environmental barrier coating as well as a preparation method and application thereof. The ytterbium silicate environmental barrier coating comprises a substrate, a Si-HfO2 bonding layer, a Yb2Si2O7 intermediate layer and a Yb2O3-RE2O3-(Yb1-xREx) 2SiO5 environmental barrier layer which are sequentially arranged. HfO2 in the Si-HfO2 bonding layer can react with Si / SiO2 at a high temperature to form a HfSiO4 phase with high thermal stability and high hardness, and the HfSiO4 phase plays a pinning role in the coating and is beneficial to preventing crack expansion; compared with a Si bonding layer, the Si-HfO2 bonding layer has higher high temperature resistance and creep resistance; the Yb2Si2O7 middle layer can effectively reduce thermal stress accumulation in the cold and hot cycling process, and the thermal adaptability of a coating system is improved; the Yb2O3-RE2O3 can promote apatite or garnet phase crystallization and prevent continuous corrosion of the CMAS to the environmental barrier coating.

The invention belongs to the technical field of uranium resource prospecting, and particularly relates to a method for selecting a thermal modeling subclass from unconventional uranium resources, which comprises the following steps of: 1, collecting an unconventional uranium resource sample; 2, sample manufacturing and processing; 3, performing optical microscope pulse body statistics; 4, observing apatite through an optical microscope; and 5, heavy sand screening statistics. The method has the characteristics of process, intuition, easiness in operation and the like, the thermal modeling subclass with higher economic value and mining value can be efficiently and conveniently selected from the widely developed unconventional uranium resources, the method is particularly suitable for regions with backward technical equipment, and the economical efficiency and the effectiveness in the aspect of prospecting of the unconventional uranium resources are greatly improved.

The invention discloses a single-component inorganic cold-coating high-temperature-resistant self-cleaning coating containing nanowhiskers as well as a preparation method and application of the single-component inorganic cold-coating high-temperature-resistant self-cleaning coating. The single-component inorganic cold-coating high-temperature-resistant self-cleaning coating is prepared from the following raw materials in percentage by weight: 18 to 22 percent of SiC / Al2O3 composite whisker, 8 to 12 percent of nano TiO2, 35 to 38 percent of silica sol, 12 to 15 percent of nano ZrO2, 5 to 8 percent of apatite antibacterial agent, 2 to 3 percent of lithium-based bentonite, 1.5 to 2 percent of silane coupling agent and the balance of water. The coating disclosed by the invention solves the problems of no high temperature resistance, VOC (Volatile Organic Compounds) pollution and poor weather resistance; the limitation of high-temperature curing is broken through, and 0 DEG C cold coating is realized; meanwhile, the coating disclosed by the invention integrates 1500 DEG C high temperature resistance and cold coating characteristics, and a single-component system is more convenient for construction.

To provide hydroxyapatite capable of efficiently decomposing VOC, and to provide a method for producing the hydroxyapatite and a method for decomposing VOC using the hydroxyapatite.SOLUTION: A hydroxyapatite of the present invention is characterized by a ratio of a peak intensity IP=O of P=O bonds to a peak intensity IP-O of P-O bonds analyzed from the O1 s spectrum (IP=O / IP-O) being 0.8 or more when measured by X-ray photoelectron spectroscopy (XPS).SELECTED DRAWING: Figure 1

The invention belongs to the technical field of mineral flotation, and particularly relates to a method for flotation of apatite, a flotation reagent, a collecting agent and a preparation method of the collecting agent, and the collecting agent for flotation of apatite is a compound with the structure shown in the formula 1 (). The invention innovatively provides a brand-new collecting agent with a structure as shown in the formula 1, and the collecting agent can construct a selective targeting structural domain adaptive to apatite based on intramolecular synergy between Y and-COO in the formula 1, so that the collecting rate and selectivity of the apatite can be improved.