671 results about "Dissolution" patented technology

The invention provides a method for predicting reaction activity of a geopolymer precursor material, which comprises the following steps: S1, weighing the geopolymer precursor material A, and mixing with a NaOH solution; s2, heating and stirring the mixed solution in the S1, and reacting to obtain a composite solution; s3, carrying out suction filtration on the composite solution; drying and weighing filter residues obtained by suction filtration; s4, measuring the ion concentration in the filtrate obtained by suction filtration in S3; s5, calculating the dissolution rate of the A by using the mass of the A and the mass of the filter residues; s6, testing the actual activity index of the geopolymer precursor material A; s7, obtaining a calculation formula of the predicted activity index of A by using the dissolution rate and the ion concentration; and S8, solving a calculation formula of the actual activity index in S6 and the predicted activity index in S7 to obtain a calculation model of the predicted activity index of A. The problems that in the prior art, geopolymer precursor material reaction activity prediction is time-consuming and labor-consuming, not suitable for all environments and large in error are solved.

The invention provides a waste glass activity rapid comprehensive evaluation method based on dissolution kinetics analysis. According to the method, the silicon ion dissolution characteristic of the waste glass in an alkaline environment is measured, the particle size effect and kinetic parameter analysis are combined, the corresponding relation with the 28-day compressive strength activity index is established, and rapid evaluation of the activity of the waste glass is achieved. The method comprises the steps of dissolution test, kinetic analysis and activity evaluation. Research finds that a power function relationship exists between the reaction rate constant and the particle size, and good linear correlation exists between the dissolution characteristic and the activity index. According to the invention, a complete evaluation system of particle size-reaction rate-activity index is established, the goal of predicting the 28-day activity index from the 24-hour dissolution characteristic is realized, and the error between the prediction result and the measured value is less than 2%. The method is short in evaluation period and accurate and reliable in result, and has important engineering application value.

An ultra-deep carbonate rock dissolution simulation experiment device and method. The experiment device comprises: at least two reaction kettles (1) arranged in series connection, the reaction kettles (1) each comprising a confining pressure mechanism (10) and an axial pressure mechanism (20), wherein the confining pressure mechanism (10) is provided with a rock core cavity for accommodating a rock core (2) and can apply confining pressure to the rock core (2), the axial pressure mechanism (20) is used for applying axial pressure to the rock core (2) in the rock core cavity, and the axial pressure mechanism (20) is provided with a reaction solution interface communicating with the rock core cavity; a solution pressure vessel system (40), capable of providing a reaction solution and injecting the reaction solution into the rock core cavities by means of the reaction solution interfaces; at least two back pressure control devices (30), outlet ends of the rock core cavities of the reaction kettles (1) being connected to the back pressure control devices (30); and a detection system (50). The rock core cavities of the reaction kettles (1) are in series connection, and the reaction solution provided by the solution pressure vessel system (40) can sequentially flow through the rock core cavities in series connection, and the detection system (50) is used for separately performing detection on each rock core cavity, thereby solving the technical problem of the difficulty in conducting simulation experiments with respect to the dissolution of strongly altered carbonate rocks in ten-thousand-meter ultra-deep conditions.

The invention discloses a mine water recharge reservoir scaling trend prediction, scale removal and permeation enhancement method, and the trend prediction method comprises the steps: carrying out the conventional physicochemical index analysis of the water quality of mine water and a monitoring well according to the hydrogeological information of a recharge reservoir, and calculating the scaling trend of the mine water recharge reservoir based on a Retino index method and the relative saturation R.S. The scaling conditions of carbonate, sulfate and silicate are rapidly judged respectively; when scaling occurs, the ion concentration change on a path is revealed through a Transport module and an Equilibrium Phases module in the PHREEQC software, and verification is carried out through a measured value of a monitoring well; and then according to the mineral dissolution precipitation reaction and the percentage of the reservoir rock sample composition, calculating the reaction dose and the void ratio so as to formulate a mine water recharge reservoir permeation enhancement optimization scheme. According to the method, the scaling trend of the mine water recharge reservoir can be effectively predicted, the recharge process is monitored, and continuous operation of deep well recharge sealing work of mine water is facilitated.

The invention discloses a comprehensive detection method for detecting the quality of a traditional Chinese medicine capsule, and relates to the technical field of medicine quality detection.According to the method, the quality fluctuation of a shell can be effectively recognized by monitoring the elasticity modulus of the shell of the capsule in real time and constructing a variable coefficient; and secondly, further monitoring is carried out aiming at capsule filling types and density uniformity, so that the uniformity of medicine filling is ensured, the medicine effect fluctuation caused by non-uniform filling is avoided, and the release consistency of the medicine is improved. And then, based on dissolution rate gradient monitoring under different temperature and pH value conditions, the dissolution characteristics of the capsule in various environments can be comprehensively evaluated, so that the dissolution performance stability of the capsule is guaranteed. And finally, accurately calculating a dissolution stable factor by combining the detection of trace dissolution substances with a dissolution characteristic analysis model, and further optimizing the quality evaluation of the capsules by combining a dissolution rate change coefficient, thereby reducing unqualified batches caused by uneven dissolution.

The invention relates to a method for calculating molecular weight of a biological macromolecular material based on an AI algorithm. Part of biopolymer materials are difficult to form monomolecular chains after being dissolved into an aqueous solution, the ionic liquid is selected as a dissolution system, the monomolecular chains can be well formed after the macromolecular materials are dissolved, and then rheological data after biomacromolecules are dissolved in the ionic liquid are tested by using a rheological method. According to the method, a Rouse model is selected as a polymer solution model, and key parameter values are obtained by measuring a large amount of data, training the model by using an AI algorithm and carrying out nonlinear fitting, so that the molecular weight value of the measured material is calculated. The calculation method has the characteristics of accuracy and rapidness, and can be well popularized to the field of computer research of high polymer materials.

The invention provides a method for realizing dynamic balance of source water minerals based on ion coordinated regulation and control, and belongs to the technical field of water treatment. According to the method, multi-parameter coupling regulation and control are achieved by conducting split-flow pretreatment on source water and building a dynamic synergistic coefficient model, the source water is separated to prepare calcium-magnesium compensation liquid, the ion concentration and the water temperature are monitored in real time, and a synergistic coefficient model fusing ion activity factors and the temperature effect is built; a fuzzy PID controller is used for dynamically analyzing pH fluctuation and collaborative deviation to adjust the injection proportion of compensation liquid, and precise mineralization is achieved by combining turbulence mixing intensity optimization; a closed-loop feedback mechanism and a high-frequency liquid supplementing technology are adopted to quickly correct ion concentration deviation, and the dissolution activity of compensation liquid is differentially regulated and controlled through a reverse temperature difference strategy so as to stabilize pH. According to the method, the ion synergistic effect, dynamic algorithm control and dissolution kinetics optimization are combined, the response speed and balance precision of water quality regulation are improved, and the method is suitable for precise mineral regulation and quality optimization of high-quality drinking water.

The invention relates to the technical field of image data processing, in particular to a water-soluble fertilizer dissolution rate visual measurement method and system, and the method comprises the steps: obtaining a sequence image of a dissolution process; performing multi-scale frequency domain analysis on the image, and calculating a scale convergence index by using the deviation between a local phase and a weighted average phase; a spectral sharpness factor is calculated according to the ratio of the high-frequency energy response to the low-frequency energy response; fusing the scale convergence index and the spectral sharpness factor to obtain a solid boundary probability; segmenting the particle region based on the probability and converting the particle region into physical mass, and differentiating a mass change sequence to obtain a dissolution rate. By fusing the phase consistency and the frequency domain energy distribution characteristics, the physical entity edge and the optical refraction halo are effectively distinguished, the refraction interference problem during high-concentration dissolution is solved, and the dissolution rate measurement accuracy is improved.

The present invention relates to the technical field of test and detection, and particularly to an on-line measurement method and device for total iron in power station water vapor. A catalytic reagent is added to the water sample to be measured and acts through an ultraviolet light oxidizer, so as to completely convert the colloidal iron in the water sample into ferric ions. The dissolution and conversion of the colloidal iron are completed without adding acid throughout the process. Since no acid is added during the process of converting the whole colloidal iron into dissolved iron, only a chromogenic reagent needs to be added to accurately measure the total iron content in the water sample, and it is also easier to realize the on-line measurement of total iron in the water sample. When the total iron content in the water sample is less than 10 μg / L, the water sample enters the concentration system for concentration and then optical measurement, so that the low-concentration total iron in the water sample can also be accurately measured. This measurement method can automatically measure the total content in the water sample on-line, avoid manual sampling and detection, can monitor the total iron in the water sample in real time, and has a lower detection limit and more accurate detection results, which is beneficial to the adjustment of the water condition during the start-up and shutdown stages of the power station.

The invention provides a method and system for predicting the liquid nitrogen content of steel in the VD refining process. The method comprises the steps that technological parameters of the VD vacuum degassing process are obtained, and a nitrogen content prediction model is constructed to output a target nitrogen content prediction value according to the technological parameters. In the prediction model, a first calculation module is used for calculating an activity coefficient of a nitrogen element in molten steel, a second calculation module is used for calculating a dissolution equilibrium constant, a third calculation module is used for calculating a mass percentage of the nitrogen element in the molten steel when the dissolution equilibrium is reached, and a fourth calculation module is used for calculating a ratio of an interface reaction area to a molten pool volume. The correction module is used for acquiring a corrected mass transfer coefficient, and the fifth calculation module is used for calculating a target nitrogen content predicted value. Calculation is carried out by adopting the thermodynamic principle through the constructed prediction model, the nitrogen content in the molten steel in the vacuum degassing process can be predicted, the problem that the nitrogen content cannot be obtained in the degassing process is solved, the nitrogen content prediction value is calculated through the corrected mass transfer coefficient, and the accuracy of the calculation result can be improved.

A dissolution apparatus configured to dissolve a waste resin in a dissolution tank with a solvent. The dissolution apparatus includes: a supply device configured to supply the waste resin and the solvent into the dissolution tank; a heating device configured to heat the waste resin and the solvent supplied to the dissolution tank; a stirrer configured to stir the waste resin and the solvent, heated by the heating device; a torque sensor configured to detect a load torque acting on the stirrer; and a microprocessor. The microprocessor is configured to perform: calculating a viscosity of a solution of the waste resin and the solvent based on the load torque detected by the torque sensor, and controlling at least one of the supply device and the heating device such that the viscosity calculated in the calculating becomes less than a predetermined value.

Targetry coupled separation refers to enhancing the production of a predetermined radiation product through the selection of a target (including selection of the target material and the material's physical structure) and separation chemistry in order to optimize the recovery of the predetermined radiation product. This disclosure describes systems and methods for creating (through irradiation) and removing one or more desired radioisotopes from a target and further describes systems and methods that allow the same target to undergo multiple irradiations and separation operations without damage to the target. In contrast with the prior art that requires complete dissolution or destruction of a target before recovery of any irradiation products, the repeated reuse of the same physical target allowed by targetry coupled separation represents a significant increase in efficiency and decrease in cost over the prior art.

The invention belongs to the technical field of iron ion detection, and particularly relates to a rapid detection method for ferric ions in water, which comprises the following steps: a fluorescent probe preparation step: taking trihydrate of copper nitrate and tryptamine, adding into a centrifuge tube in sequence, adding ultrapure water, performing ultrasonic dissolution, transferring into a high-pressure reaction kettle, and performing hydrothermal reaction to obtain a fluorescent probe; cooling to room temperature, centrifuging the obtained yellow green solution in a centrifugal machine, and filtering the supernate through a microfiltration membrane to obtain a copper-doped carbon quantum dot CuCDs stock solution, namely the fluorescent probe; analyzing and determining Fe < 3 + >: taking the diluent of the prepared CuCDs solution, adding the diluent into a centrifugal tube containing a Fe < 3 + > standard solution, uniformly mixing, carrying out fluorescent quantitative analysis and detection, and exploring the change rule of the fluorescence intensity ratio of CuCDs; according to the rapid detection method for Fe < 3 + > provided by the invention, the synthesized CuCDs have high sensitivity, can realize on-site rapid detection of Fe < 3 + > in a water medium, and shows a wide application prospect in the field of environmental monitoring.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for determining dissolution kinetics of solute in metallurgical slag based on molecular dynamics simulation, compared with a traditional experimental method, molecular dynamics simulation does not need a large number of thermal state experiments and complex detection modes, and large-scale simulation calculation can be rapidly completed on a computer. And meanwhile, various different conditions can be simulated in a short time, and superior processes and slag systems can be quickly screened out. According to the method, the reaction which is difficult to observe clearly can be visualized, the atomic trajectory behavior of the dissolution behavior, the dynamic change, the dispersion process of the solute and the like are provided, rich and accurate information is provided for research on dissolution kinetics, and the dissolution rule and the structure evolution mechanism of the solute in the high-temperature melt can be revealed. In addition, the method is high in safety, and danger possibly brought by a high-temperature experiment is avoided.

The invention relates to a method for recovering platinum in nickel-platinum waste. The method comprises the steps of hot nitric acid dissolution, filtration, pH adjustment, selective precipitation and drying. The characteristic that hot nitric acid can completely dissolve Ni and partially dissolve Pt is utilized to achieve preliminary separation of NiPt, sodium sulfide is used as a precipitator, selective precipitation of platinum is achieved through the Ksp difference of platinum sulfide and base metal sulfide within the pH range of 1-2, the recovery rate of platinum is greatly increased, and energy consumption of the platinum recovery process is reduced. Emission of a large amount of volatile acid is avoided while economic benefits are improved, and the method is more suitable for actual production.

The invention discloses a detection method for rapidly determining the main content of magnesium hydroxide and calcium oxide in the process of preparing high-purity magnesium hydroxide from salt lake bischofite, which comprises the following steps: determining the main content of magnesium hydroxide: weighing a proper amount of sample, dissolving with hydrochloric acid and fixing the volume to obtain a test solution; taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value with an ammonia-ammonium chloride buffer solution, taking chrome black T as an indicator, and titrating the main content of magnesium hydroxide with an EDTA standard solution; and measuring the content of calcium in magnesium hydroxide: taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value by using a sodium hydroxide solution, adding a proper amount of a calcium indicator, and titrating the content of magnesium calcium hydroxide by using an EDTA standard solution. The method is simple and easy to implement, can quickly and accurately analyze and detect the main content and the calcium oxide content in the magnesium hydroxide, can realize complete dissolution of the magnesium hydroxide, and does not artificially introduce a large number of impurity elements, so that the system error is reduced, and the detection quality is improved.

A composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor. The composite oil phase is divided into material A and material B, wherein in the material A, a high-viscosity polyisobutylene maleic anhydride amine esterification derivative is used as a primary emulsifier to increase the strength and thickness of an emulsification film of an emulsion matrix, thereby improving the stability of the emulsion matrix; in the material B, a low-viscosity polyisobutylene maleic anhydride amine esterification derivative and SP-80 are used as primary emulsifiers to regulate the ammonium nitrate dissolution rate of the emulsion matrix, thereby improving the sensitization characteristic of the emulsion matrix; and the emulsion matrix prepared from two composite oil phases can effectively improve the water resistance of the emulsion matrix while the problems of high-temperature over-sensitization and low-temperature insensitivity are solved, so that the explosion quality is guaranteed.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention belongs to the technical field of hydrogen sulfide stress corrosion resistance detection of oil well pipes, and particularly relates to a method for testing the influence of anodic dissolution in saturated hydrogen sulfide on stress corrosion fracture of an oil well pipe, which comprises the following steps: respectively carrying out slow strain rate tensile tests in a saturated hydrogen sulfide environment and a nitrogen environment to obtain a stress-strain curve of an oil well pipe sample; measuring a hydrogen permeation curve of the oil well pipe sample in the saturated hydrogen sulfide environment; carrying out fast and slow sweep potential polarization curve test and hydrogen permeation curve test on the oil well pipe, and carrying out hydrogen charging-slow stretching test on the oil well pipe under the cathode hydrogen charging potential corresponding to the steady-state hydrogen permeation current density; and according to the damage degree of the saturated hydrogen sulfide environment to the mechanical properties of the oil well pipe, the minimum influence degree of hydrogen in the saturated hydrogen sulfide environment to the stress corrosion fracture of the oil well pipe is determined by combining the damage degree of hydrogen separated out from the cathode reaction to the mechanical properties of the oil well pipe. The device has the advantages of simplicity in operation and accurate measurement result.

The invention relates to the technical field of novel material chemical analysis, and discloses a triphenyl phosphate purity standard substance valuing method, which comprises the following steps: filtering, drying, dissolving and sterilizing a triphenyl phosphate sample; a triphenyl phosphate sample is comprehensively analyzed from different angles by comprehensively applying a GC-MS (Gas Chromatography-Mass Spectrometry) technology, an NMR (Nuclear Magnetic Resonance) technology, an infrared spectroscopy, a gas chromatography-flame ionization detector method, a Karl Fischer method and an inductively coupled plasma mass spectrometry, and finally, the purity value of the triphenyl phosphate purity standard substance is calculated by a mass balance method. The method provides a scientific and accurate technical means for quality control and standard formulation of the triphenyl phosphate product, has important practical application value for related industries in the fields of chemical engineering and material science, and is beneficial for improving the product quality and promoting industrial upgrading.

The invention discloses a method and system for predicting well wall fracture and instability of a salt-bearing stratum, and the method comprises the steps: respectively calculating and obtaining three drilling fluid densities through the quantitative prediction of the creep rate, collapse pressure and well drilling induced joint extension of the salt-bearing stratum, and controlling and determining an optimal drilling fluid density range through the three drilling fluid densities. The salt concentration required by the drilling fluid capable of inhibiting salt rock dissolution is calculated, so that drilling parameters of the salt-bearing stratum are optimally designed, the density range of the drilling fluid of the salt-bearing stratum and the upper limit value of the degree of mineralization of the drilling fluid are determined by comprehensively considering various factors such as the salt rock creep rate, the dissolution rate, stratum collapse and induced fracture generation, and the drilling parameters of the salt-bearing stratum are optimized. Well control safety in salt-containing formation drilling is ensured, underground complexity is avoided, the drilling speed is increased, meanwhile, secondary disasters such as environmental pollution and waste of human, property and material are avoided, and on the basis of the method, the safety of salt-containing formation drilling can be improved, the drilling speed can be increased, the development process of oil and gas resources can be enhanced, and energy safety can be promoted.

The invention discloses a method for measuring the content of impurity elements in high-purity quartz by ICP-MS (Inductively Coupled Plasma Mass Spectrometry). The method is characterized by comprising the following steps: S1, drying a sample; s2, weighing a sample; s3, primary dissolution with strong acid I; s4, secondary dissolution with strong acid II; s5, cooling and constant volume; and S6, respectively testing and analyzing the standard series working solution, the sample solution and the blank solution on ICP-MS (Inductively Coupled Plasma Mass Spectrometry). According to the method, the influence of impurity elements brought in in the sample treatment process on the determination result is reduced, the harm of precipitation generated by some metal ions and chloride ions on the accuracy of the result is avoided, the inductively coupled plasma mass spectrometer is adopted for analysis in the later period, the detection limit is greatly reduced, and the accuracy of the result is improved. Therefore, the purposes of reducing the lower limit of impurity element content measurement and increasing the upper limit of the silicon dioxide content range (the applicable silicon dioxide content range of the method can be higher than 99.99%) are achieved.

The invention relates to a ferrous sulfide cleaning method based on a ferrous sulfide cleaning device, and belongs to the technical field of petrochemical engineering treatment equipment. The method specifically comprises the steps that inspection preparation work before operation is conducted, a PLC control system injects industrial water and passivating agent liquid into a dissolving tank according to a given proportion, an electric pump B is started, the electric pump B can continuously supply liquid into equipment to be cleaned, meanwhile, a solution at the bottom of the equipment to be cleaned flows back into the dissolving tank, and the solution circularly enters and exits from the equipment to be cleaned; and according to the detected parameter change of the iron ion on-line monitor, the PLC control system automatically judges that the cleaning is finished when the change of the iron ion content does not exceed 10% in the latest two hours after the circulating cleaning is performed for 12 hours. The problems that manual matching control of industrial water and passivating agent liquid is not accurate, the iron ion content and the PH value cannot be analyzed on line, whether passivation cleaning is qualified or not cannot be automatically judged, and manual labor investment is large are solved.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

The invention relates to an ion transport performance evaluation method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring transport process simulation parameters determined based on a transport interface structure of dissolved ions; based on the transport process simulation parameters and a target machine learning force field obtained by training according to a transport interface structure of the dissolved ions in advance, carrying out molecular dynamics simulation on a dissolution process of the dissolved ions on the transport interface to obtain dissolution stress information of the dissolved ions; and determining an ion transport performance evaluation result of the dissolved ions according to the dissolution stress information. By adopting the method, the calculation cost can be reduced, and the ion transport performance evaluation rate can be improved.

The present invention relates to the technical field of computer-aided drug design, and in particular to a method and system for calculating the solvation free energy of drug molecules. The present invention evaluates the solute-solvent interaction at the atomic level by calculating the non-bonded interaction between each solute atom and a water molecule. To increase the calculation speed, an outwardly extending water solvent layer is constructed outside the solute molecule. The solvation free energy of the solute molecule is predicted by calculating the interaction energy between each atom in the solute molecule and the solvent layer, thereby realizing accurate simulation of the free energy of the dissolution process of the drug molecule.

The invention discloses a method for preparing an impurity content test solution in titanium tetrachloride by a sulfuric acid method and a detection method, and belongs to the technical field of component detection and analysis. The preparation method and the detection method comprise the following steps: adding water into a titanium tetrachloride sample to react until a precipitate is dissolved and no thick white smoke is generated; heating and evaporating the obtained product to dryness under the condition that the temperature is not higher than 100 DEG C; then adding a sulfuric acid solution and a proper amount of water, heating under the condition that the temperature is not higher than 200 DEG C until the titanium matrix is completely dissolved to obtain a clear and transparent solution, and adding water to dilute and fix the volume to obtain a titanium tetrachloride impurity content test solution with the sulfuric acid concentration being less than 2%; and determining the impurity content in the solution by adopting ICP-MS or ICP-OES. The method disclosed by the invention is simple to operate, effectively avoids the pollution risk of external elements, and reduces the operation error, thereby greatly improving the accuracy and reliability of an analysis result.

The invention relates to a ketoconazole suppository as well as a preparation method and a quality control method thereof. The ketoconazole suppository has the dissolution rates of any one or more of the following items: (1) the cumulative dissolution percentage of ketoconazole in 30 minutes, which is measured under the condition that the pH is 4.0-5.5, is greater than or equal to 15%; (2) the cumulative dissolution percentage of ketoconazole in 1 hour measured under the condition that the pH is 4.0-5.5 is greater than or equal to 30%; (3) the 30-minute cumulative dissolution percentage of ketoconazole measured under the condition that the pH is 4.0 is greater than or equal to 40%; and (4) the cumulative dissolution percentage of ketoconazole in 1 hour measured under the condition of pH 4.0 is greater than or equal to 60%.

The invention discloses a light-weight high-strength Ni-Co-based single-crystal high-entropy alloy and a preparation method thereof, the single-crystal high-entropy alloy comprises the following chemical components in percentage by atom: 45-55 at% of Ni, 15-20 at% of Co, 9-12 at% of Cr, 9-12 at% of Al, 4-8 at% of Ti, 1-2 at% of Mo, 0-1 at% of W and 0-0.1 at% of Hf, and the single-crystal high-entropy alloy comprises the following eight elements: 45-55 at% of Ni, 15-20 at% of Co, 9-12 at% of Cr, 9-12 at% of Al, 4-8 at% of Ti, 1-2 at% of Mo, 0-1 at% of W and 0-0.1 at% of Hf. The preparation method comprises the following steps: obtaining a liquidus temperature through analog calculation, and obtaining an eutectic dissolution temperature through a melting point test; the preparation method comprises the following steps: putting elemental elements Ni, Co, Cr, Ti, Mo and W into a crucible of a vacuum induction melting furnace in sequence, and pouring into a master alloy ingot; a high-speed solidification Bridgeman method and a seed crystal method are adopted to prepare a crystal grain with the orientation of 1t; 001gt, 001gt; preparing a single-crystal high-entropy alloy test bar; and the single-crystal high-entropy alloy test bar is sequentially subjected to solution treatment, first-stage aging and second-stage aging, and the light-weight high-strength Ni-Co-based single-crystal high-entropy alloy is obtained. The single-crystal high-entropy alloy prepared through the method is small in density and meanwhile has excellent room-temperature mechanical property and high-temperature mechanical property.

The invention relates to the technical field of underground hydrogen storage, and discloses an underground hydrogen storage prediction method coupled with a chemical reaction. The method comprises the following steps: determining the hydrogen leakage flux of the underground hydrogen storage according to reservoir information of the underground hydrogen storage based on the Darcy law; according to three-phase substances including mineral composition, solution composition and gas composition of the underground hydrogen storage, a physical model containing a mineral-fluid-gas storage three-phase substance equilibrium relation of the underground hydrogen storage is established by utilizing the law of conservation of substances; according to the dissolution trends of different minerals in the underground hydrogen storage under the hydrogen-fluid-rock chemical reaction system, a dissolution kinetic model of the different minerals is established; and according to the hydrogen leakage flux, the coupling physical model and the dissolution kinetic model, obtaining the change conditions of mineral composition, solution composition and gas composition in the underground hydrogen storage library caused by hydrogen-fluid-rock chemical reaction under the hydrogen leakage flux, so as to predict the hydrogen storage condition of the underground hydrogen storage library.