89 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.

The invention provides a method for quantitatively evaluating the storage condition of magma hydrothermal deposit based on thermochronology, which comprises the following steps: determining a sample sampling point based on field geological survey, collecting typical samples, picking out zircon and apatite monominerals, and preparing a U-Pb isotope test target and a fission track test optical slide; carrying out fission track dating on the zircon and the apatite to measure the U-Pb isotope age and (U-Th) / He isotope age of the zircon and the apatite; thermal history evolution process simulation is carried out by integrating test data, and finally, the deposit preservation condition is quantitatively calculated and evaluated according to simulation. According to the method, a scientific quantitative full-chain research scheme is provided for augmentation, denudation and thermal history evolution research of the magma hydrothermal deposit, and the technical problem of quantitative evaluation of the storage condition of the magma hydrothermal deposit is solved.

The invention discloses a method for efficiently removing heavy metals in soil, which comprises the steps of sample collection, sample pretreatment, supramolecular cage preparation, heavy metal capture, material screening and the like, heavy metals such as mercury, lead, cadmium and the like in the soil are captured through the supramolecular cage, and a magnetic carrier after capturing the heavy metals is removed through a magnetic separation mode; the process flow period is short, the heavy metal removal efficiency is high, no nanoparticle residue risk exists, the long-term leaching risk of apatite, bentonite and other curing agents in a traditional stabilization technology is avoided, environment friendliness is high, and the method is especially suitable for industrial sites, mining areas and other combined pollution scenes and has wide application prospects. And an innovative technical path capable of being popularized is provided for soil remediation.

The invention discloses a process for recovering apatite from iron ore dressing tailings through flotation, and belongs to the technical field of ore dressing. The method comprises the following steps: 1, carrying out high-gradient magnetic separation treatment on the iron separation tailings, recovering and removing magnetic iron-containing minerals, returning the removed iron-containing minerals to an iron separation main process, feeding the tailings into a chute to remove large-particle gangue minerals, and then feeding the tailings into a thickening pool to be concentrated; secondly, sulfide ore flotation and gypsum flotation are sequentially carried out on the bottom flow products of the thickening pool to remove impurities prone to interference, then apatite collecting and direct flotation are carried out, and apatite concentrate is obtained; and 3, carrying out ultrafine grinding dissociation and impurity selective argillization on the apatite concentrate, and then carrying out apatite closed-loop concentration to obtain a qualified apatite concentrate product. According to the method, the apatite in the iron ore dressing tailings can be well recycled, and the method has great economic feasibility.

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 disclosure relates to a continuous process for obtaining phosphoric acid and calcium sulphate dihydrate from apatite, and sulphuric acid using hydrochloric acid as an intermediate attacking agent, comprising the steps: Leaching (101) apatite (11) with an aqueous solution of hydrochloric acid (12,13) to solubilize phosphorus compounds contained in the apatite, thereby obtaining a solution (15) containing phosphate (H3PO4) and calcium chloride (CaCI2); extracting (103) said solution (15) with organic solvent (16), yielding an organic extract (17) loaded with phosphate ions, and an aqueous raffinate (21) containing calcium chloride and residual impurities; re-extracting the phosphate ions from the organic extract (17) with water (18), thus yielding an aqueous extract (19) of phosphoric acid, and an unloaded organic phase substantially free of phosphoric acid, reacting (107) the raffinate (21) containing calcium chloride with sulphuric acid (26) to cause precipitation of calcium ions in the raffinate as calcium sulphate dihydrate and to recover chloride ions in the raffinate in the form of hydrochloric acid (12), filtering off (108) precipitated calcium sulphate dihydrate (27) from the previous step (107) and washing it with water, dividing (113) the remaining hydrochloric acid (12) aqueous solution into a primary stream (12a) and a secondary stream (12b); and recycling (112) the primary stream (12a) of the aqueous solution of hydrochloric acid (12) to the step (101) of the leaching apatite, and at least partially removing the secondary stream (12b) from the process.

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 invention provides an alkyl ether hydroxamic acid collecting agent and a preparation method and application thereof, and belongs to the technical field of flotation beneficiation. The alkyl ether hydroxamic acid collecting agent is prepared through a hydroxylamine method, namely, alkyl ether acetic acid and methyl alcohol are subjected to an esterification reaction firstly, then hydroxylamine and alkali are subjected to a hydroximation reaction, and a final product is obtained. On the basis of a traditional hydroximic acid collecting agent, an alkyl ether functional group is introduced to enhance the selectivity, and the alkyl ether functional group and a hydroxime group in a molecular structure have a synergistic effect, so that the collecting performance and the selectivity are further improved. The alkyl ether hydroxamic acid collecting agent prepared through the method can be applied to the field of flotation of various minerals such as rare earth ore, tungsten ore, cassiterite, apatite, malachite and ilmenite. In addition, the collecting agent can reduce the use amount of flotation reagents, and has important significance in mineral flotation operation.

The method comprises: introducing an aqueous carrier liquid comprising ammonium phosphate into a subterranean formation comprising carbonate minerals; and interacting the carbonate mineral with the ammonium phosphate salt to convert at least a portion of the carbonate mineral to a hydroxyapatite mineral; wherein the hardness of the subterranean formation is increased after formation of the hydroxyapatite mineral.

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.

The present invention discloses a high-precision uranium-lead ratio testing system and method for apatite, which relates to the technical field of uranium-lead dating. The testing system includes a Resolution LR-S155 193nm ArF excimer laser ablation system and a Thermo Scientific iCap TQ inductively coupled plasma mass spectrometer; the testing system follows the standard methods commonly used in laboratories. The testing method includes the following steps: S1. Pretreatment: cutting, cleaning, drying, and target preparation of the apatite sample; S2. Instrument analysis: including instrument debugging, pre-ablation of the sample, and data processing; S3. Data processing: obtaining the U-Pb age calculation result of the apatite sample according to the data results obtained in the instrument analysis in step S2 and the corresponding age calculation method. The testing system and method of the present invention can meet the limitation that the dating method has no age time range, and solve problems such as the lack of suitable absolute dating techniques for the early Cenozoic strata and the rarity of absolute dating of late Miocene sedimentary rocks and fossils.

The invention relates to the technical field of geological exploration, and discloses a deep exploration evaluation method based on multi-parameter geology and thermal history simulation. Mineralized quartz and granite samples in a target area are collected, the samples are sent into a laboratory to be processed, including cleaning, cutting and grinding, the collected samples are analyzed, and the analysis result is obtained. The method specifically comprises the following steps: analyzing the metallogenic depth of an inclusion, analyzing the invasion depth of a rock mass, analyzing the invasion age of a sample, and obtaining the cooling age of the sample by combining fission tracks of zircon and apatite. The method is used for analyzing a collected sample, and specifically comprises the following steps: analyzing the metallogenic depth of an inclusion, analyzing the invasion depth of a rock mass, analyzing the invasion age of the sample, obtaining the cooling age of the sample by combining fission tracks of zircon and apatite, and carrying out comprehensive calculation based on the denudation thickness, the invasion depth and the formation depth of an ore body. Therefore, the storage condition of the ore body is finally obtained, deep mineralization favorable information is obtained, and deep mineral product prediction is realized.

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 invention relates to a normal-temperature and normal-pressure high-conductivity micro-nano material based on copper-doped lead apatite as well as preparation and application thereof. The chemical general formula of the material is Pb10-XCux (PO4) 6O, x is more than 0.95 and less than 1.05, the material has a hexagonal system apatite structure, Cu < 2 + > occupies a lattice 4f site and forms a [CuO5] pyramid unit, strong electroacoustic coupling is realized through Jahn-Teller distortion, and the material shows excellent conductivity at normal temperature and normal pressure. The room temperature resistivity of the material is less than or equal to 0.05 mu omega.cm, the critical current density is greater than or equal to 1.2 * 10 < 6 > A / cm < 2 >, and the sulfur impurity content is less than or equal to 0.05 at% The invention further discloses a gradient sulfur control heat treatment method, and the purity and the conductive stability of the material are remarkably improved. The material is suitable for a power transmission system, is particularly suitable for a high-conductivity component without cooling, and has the advantages of high current carrying capacity, high environmental resistance, low cooling cost and the like.

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%.

The invention relates to the technical field of oil exploration and development, in particular to a paleostructure denudation amount recovery method, medium and equipment, and the method comprises the following steps: obtaining an apatite sample of a researched area; testing the apatite sample by adopting an external detector method, and calculating the fission track age; and according to the age and length data of a single particle of the fission track, the structure-thermal history evolution process of the sample is simulated by combining the actual geological characteristics of the sampling well. On the basis of drilling and logging data, analysis and test data and seismic data, an apatite fission track method is used for calculating the distance between the corresponding depth and the respective unconformity surface of the ancient ground temperature gradient curve extending to the ancient ground surface temperature position in each period, and then the lifted denudation amount in each period is obtained.

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.