26 results about "Strontium hydroxide octahydrate" patented technology

The invention provides a high-temperature-resistant magnesia-carbon composite refractory brick and a preparation method thereof, and belongs to the technical field of magnesium oxide refractory wall bricks, the refractory brick comprises the following raw materials: double-layer modified magnesium oxide, modified crystalline flake graphite, zircon powder, modified liquid phenolic resin and a benzoxazine cross-linking agent; the double-layer modified magnesium oxide is obtained by firstly coating magnesium oxide with powder phenolic resin, aluminum oxide and zirconium oxide and then coating magnesium oxide with asphalt, micron magnesium oxide, zirconium oxide and calcium oxide; the modified crystalline flake graphite is obtained by coating crystalline flake graphite with strontium hydroxide, asphalt and boron carbide; the modified liquid phenolic resin is formed by mixing liquid phenolic resin with a silane coupling agent and a polyacrylate cross-linked polymer. Double-layer modified magnesium oxide, modified crystalline flake graphite and modified liquid phenolic resin are prepared by adopting special components and a method and are matched with zircon powder and a benzoxazine cross-linking agent for use, and a reasonable forming and sintering process is designed, so that the refractory brick has good high-temperature stability, oxidation resistance, thermal shock resistance and the like.

The invention relates to a method of providing an ore concentrate solution suitable for beneficiation processing, the method including the step of contacting an ore with one or more metal bases at elevated temperature. The one or more metal bases at elevated temperature may form a super-alkaline media that partially or fully dissolves the ore. Typically, the one or more metal bases are alkali metal bases, preferably chosen from lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide or caesium hydroxide, or alkaline earth bases, preferably chosen from calcium hydroxide, barium hydroxide or strontium hydroxide. The one or more metal bases at elevated temperature may form a super-alkaline media that partially or fully dissolves the ore.

The application discloses a kind of polystrontium aspartate / potassium and its preparation method and application, belong to daily chemical technical field.The polystrontium aspartate / potassium using poly succinimide can be prepared in the aqueous solution of strontium hydroxide and potassium hydroxide hydrolysis.The preparation process has the characteristics of mild conditions, simple process, low cost, high efficiency and environmental protection.The polystrontium aspartate / potassium provided by the application is used for whitening and anti-allergic toothpaste, has the dual effect of moisturizing and whitening and anti-allergic, compared with adding poly sodium aspartate and potassium chloride, strontium chloride respectively, the use of polystrontium aspartate / potassium eliminates a large number of sodium ions and chloride ions, effectively reduces the ion concentration in formula, reduces formula difficulty.

The invention relates to a method for adjusting the reaction yield of piperazine and triethylene diamine prepared from ethylenediamine, which comprises the following steps: taking an ethylenediamine aqueous solution as a raw material, taking a ZSM-5 molecular sieve as a spherical catalyst of an active center, taking a fixed bed reactor as a reactor, reacting at the temperature of 300-360 DEG C at the mass space velocity of 0.1-4h <-1 >, inert ceramic balls or ceramic rings with the height of 0.5 m are placed below the catalyst bed layer, the ceramic balls or ceramic rings are composed of alpha-phase aluminum oxide, an auxiliary agent is added in the raw material feeding process, the auxiliary agent is one or a mixture of more of potassium hydroxide, calcium hydroxide, strontium hydroxide, sodium aluminate and potassium aluminate, and the raw material feeding process is completed; the yields of piperazine and triethylene diamine products are adjusted by adjusting the addition amount of the auxiliary agent, the reaction temperature and the feeding mass space velocity of the raw materials, and the adjustment range of the reaction product piperazine to triethylene diamine is 1: (0.2-0.9). According to the method disclosed by the invention, the yield of piperazine and triethylene diamine can be adjusted according to industrial production and market demand conditions.

The invention discloses a samarium monatomic and strontium-doped neodymium oxide composite catalyst and a preparation method thereof, a nonylphenol electrochemical sensor and application thereof. The preparation method of the composite catalyst comprises the following steps: adding resorcinol, a formaldehyde solution and Sm (NO3) 3.6 H2O into an absolute ethyl alcohol-based colloidal suspension to carry out sol-gel treatment, and carrying out carbonization and etching to obtain Sm-SAC; the preparation method comprises the following steps: dropwise adding a first solution containing strontium hydroxide and neodymium nitrate hexahydrate into a second solution containing 1, 2, 3-triazole, trimesic acid and polyvinylpyrrolidone to prepare a Sr-Nd bimetallic precursor, annealing to obtain strontium-doped neodymium oxide, adding the Sm-SAC and the strontium-doped neodymium oxide into water, and carrying out ultrasonic dispersion, centrifugation, washing and drying to obtain the composite catalyst. The composite catalyst provided by the invention has strong adsorption capacity, efficient electrocatalytic oxidation activity, excellent anti-interference capability and structural stability, and the sensor has high recovery rate, low signal attenuation and excellent reusability.

The invention relates to the technical field of magnesium alloy surface treatment, in particular to strontium salt and calcium salt composite chemical conversion liquid for magnesium alloy, a preparation method and a preparation method of a conversion film. The method comprises the following steps: firstly, preparing a saturated calcium bicarbonate solution and a saturated strontium hydroxide solution; sequentially adding a saturated strontium hydroxide solution and hydrogen peroxide into water to obtain a strontium hydroxide preparation solution; preparing a sodium bicarbonate solution; mixing the saturated calcium bicarbonate solution, the strontium hydroxide preparation solution and the sodium bicarbonate solution to obtain a strontium salt and calcium salt composite chemical conversion solution; and the magnesium alloy part to be treated is placed in the strontium salt and calcium salt composite chemical conversion liquid, and after no bubble emerges, the magnesium alloy part subjected to surface treatment is taken out, washed with water and blow-dried. The method is low in cost, low in energy consumption and environmentally friendly, and the prepared composite conversion film composed of SrCO3, CaCO3, MgCO3, MgO, Al2O3 and other phases is uniform, fine, smooth and flat and has excellent corrosion resistance.

The present invention relates to a method of providing a concentrate solution suitable for use in a beneficiation process, the method comprising the step of contacting the ore with one or more metal bases at an elevated temperature. The one or more metal bases may form an ultra-alkaline medium that partially or fully dissolves the ore at elevated temperatures. Typically, the one or more metal bases are alkali metal bases, preferably selected from lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide or cesium hydroxide; or an alkaline earth metal base, preferably selected from calcium hydroxide, barium hydroxide or strontium hydroxide. The one or more metal bases may form an ultra-alkaline medium that partially or fully dissolves the ore at elevated temperatures.

The invention discloses a bone implant material super-hydrophilic coating and a preparation method thereof. The preparation method comprises the following steps: adding calcium hydroxide, strontium hydroxide and ethylenediamine tetraacetic acid disodium salt into water to form turbid liquid; standing the turbid liquid to obtain a layered solution; adding disodium hydrogen phosphate into the layered solution, and adjusting the pH value to obtain a mixed solution; a bone implant and the obtained mixed solution are subjected to a hydrothermal reaction, and then the super-hydrophilic coating is formed on the bone implant. Other surfactants and template molecules do not need to be added, so that no toxic substance is generated, and the method is safe and environment-friendly; the super-hydrophilic nano-hydroxyapatite reticular coating is synthesized in one step, the reaction time is short, the temperature is low, the cost is low, and the process repeatability is good; the obtained net-shaped coating is uniform in morphology and high in wrapping performance, the roughness of the surface of the implant is increased, better attachment points are provided for bone cells, and growth of bone tissue and fixation of the implant are promoted; the obtained coating has super-hydrophilicity; the biocompatibility is good.

The invention relates to a piezoelectric material and an application thereof in preparation of an anti-osteosarcoma medicine. The invention provides a piezoelectric material on the first aspect, the piezoelectric material comprises a bismuth / strontium titanate heterojunction, and the bismuth / strontium titanate heterojunction is composed of strontium titanate nanoparticles and bismuth elementary substances evenly distributed on the surface of strontium titanate. The invention also discloses a preparation method of the piezoelectric material, which comprises the following steps: uniformly mixing a tetrabutyl titanate solution and a strontium hydroxide solution to obtain a first mixed solution; and adding a potassium hydroxide solution into the first mixed solution, uniformly mixing, and then carrying out hydrothermal reaction to obtain the strontium titanate nanoparticles. The medicine prepared from the piezoelectric material can inhibit the growth of osteosarcoma cells under ultrasonic and near-infrared light treatment, accelerate bone differentiation and promote osteogenesis, and the medicine prepared from the piezoelectric material provides a better osteosarcoma treatment effect.

The application discloses a strontium hydroxide precipitation high-temperature calcining device, which comprises a mounting frame, a furnace cylinder horizontally arranged on the mounting frame, feed inlets and discharge outlets arranged on the two sides of the furnace cylinder respectively, an air feed frame vertically arranged on one side of the upper end surface of the mounting frame, one end of the air feed frame fixed to the furnace cylinder, a guide chute arranged on the air feed frame and communicated with the feed inlet of the furnace cylinder, a combustion machine installed on the upper end surface of the furnace cylinder, a heat exhaust pipe vertically connected to one side of the furnace cylinder away from the combustion machine, a material rotating control assembly arranged in the furnace cylinder with the same center, a material storage seat connected to the discharge outlet of the furnace cylinder through an adjusting pipe, a material box arranged on one side of the mounting frame, one end of the material storage seat communicated with the material box, a switching pipe communicated with the material box, one end of the switching pipe communicated with the combustion machine through a heat recovery pipe.

Disclosed is a method for preparing a catalyst for methane reforming, comprising the steps of: preparing a solution containing a precursor of a perovskite-based compound represented by the above Chemical Formula 1; and coating a support with the solution and performing heat treatment to obtain a catalyst, wherein a precursor of the perovskite-based compound represented by the above chemical formula 1 includes strontium hydroxide.

The invention relates to the fields of chemical industry, pyrotechnic compositions, fireworks and crackers and the like, and relates to preparation of strontium fumarate serving as a novel compound material with coloring agent and reducing agent effects, and preparation and application of the material in the fields of pyrotechnic compositions, fireworks and crackers and the like. The preparation method comprises the following steps: mixing fumaric acid and strontium carbonate or strontium oxide or strontium hydroxide, and heating an aqueous solution to prepare strontium fumarate; furthermore, strontium fumarate can be fully mixed with selected other substances to prepare a red pyrotechnic composition, and the red pyrotechnic composition can be applied to fireworks and crackers and other fields; in addition, strontium fumarate is mixed with other selected substances, a small amount of perchlorate can be selectively added to be fully mixed to prepare non-pyrotechnic composition or pyrotechnic composition substances in various geometrical shapes, and then the substances are placed in handheld, ground and air (including an aircraft) devices or equipment to be used for preparing the non-pyrotechnic composition or pyrotechnic composition. The non-pyrotechnic composition and the pyrotechnic composition substance can be ignited according to the electronic heating principle, and red light is emitted through combustion for color development.

A method for producing a methane reforming catalyst according to one embodiment of the present application includes the steps of preparing a solution containing a precursor of a perovskite compound represented by Chemical Formula 1; and coating a support with the solution and then performing a heat treatment process to produce a catalyst, where the precursor of the perovskite compound represented by Chemical Formula 1 contains strontium hydroxide.

A rechargeable alkaline battery includes an anode comprising zinc, a cathode, and separator disposed between the anode and the cathode. The separator comprises a water-insoluble metal hydroxide. For example, the water-insoluble metal hydroxide can be magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, or any combination thereof. The separator comprising the water-insoluble metal hydroxide can serve to capture a portion of any zincate ions produced at the anode prior to the zincate ions passing through the separator to the cathode.

A plate-shaped chemical heat storage comprising a substrate composed of a net made of metal and a heat storage material composition supported on the substrate, wherein the heat storage material composition comprises at least one selected from the group consisting of magnesium hydroxide or oxide, strontium hydroxide or oxide, barium hydroxide or oxide, calcium hydroxide or oxide, and calcium sulfate, and optionally at least one selected from the group consisting of titanium dioxide, silicon dioxide, alumina silicate fiber, E-glass fiber and cellulose.

The invention provides a method for preparing high-purity strontium undecahydrotetradecaborate through ion exchange. The method comprises the following steps: firstly, dissolving and filtering a sodium undecahydrotetradecaborate crude product to obtain a sodium undecahydrotetradecaborate crude product solution; then adsorbing and desorbing the crude solution of the undecahydrotetradecaboron sodium salt on anion exchange resin to obtain a pure water solution of undecahydrotetradecaboronic acid; and finally, dropwise adding the strontium hydroxide aqueous solution into the undecahydrotetradecaboronic acid aqueous solution to prepare the strontium undecahydrotetradecaboronic acid salt. The product obtained by the preparation method has the characteristics of high purity, simple process flow, economy, environmental protection and suitability for industrial production, and the comprehensive yield can reach 98.4 wt.%. According to the preparation method disclosed by the invention, the anionic ion exchange resin is used for removing impurities, and then purification is performed through neutralization and crystallization, so that the method is convenient to operate, the purification quantitative control is convenient, and the boron undecahydromyristate can be purified from a superior pure reagent to a high purity of 99.8 wt.% or above.

The present invention relates to the technical field of chemical production, and particularly relates to a filter press for the production of crude strontium hydroxide. A filter press for the production of crude strontium hydroxide is provided, which can simultaneously clean all filter plates and improve the cleaning efficiency. A filter press for the production of crude strontium hydroxide includes a base, a hydraulic cylinder, filter plates, a gas transmission pipeline, a drainage pipeline, a feeding assembly, etc. The right part of the base is connected with a hydraulic cylinder through bolts, a plurality of filter plates are slidably connected to the base, the lower side of the front part of the base is connected with a gas transmission pipeline, the lower side of the rear part of the base is connected with a drainage pipeline, and the left side of the base is connected with a feeding assembly. In the present invention, the first servo motor drives the sliding seat to move downward, so that the spray heads are all located between the mutually approaching sides of the filter plates, thereby quickly cleaning all the filter plates, improving the cleaning efficiency, and avoiding affecting the filtration efficiency of the next batch of crude strontium hydroxide.

The present invention provides a high-temperature resistant magnesia-carbon composite refractory brick and a preparation method thereof, belonging to the technical field of magnesia refractory wall bricks. The raw materials of the refractory brick include double-layer modified magnesia, modified flake graphite, zirconium silicate powder, modified liquid phenolic resin, and benzoxazine cross-linking agent. The double-layer modified magnesia is obtained by first coating magnesia with powder phenolic resin, alumina, and zirconia together, and then coating it with pitch, micron magnesia, zirconia, and calcium oxide together. The modified flake graphite is obtained by coating flake graphite with strontium hydroxide, pitch, and boron carbide together. The modified liquid phenolic resin is prepared by blending liquid phenolic resin with silane coupling agent and polyacrylate cross-linked polymer. The present invention uses special components and methods to prepare double-layer modified magnesia, modified flake graphite, and modified liquid phenolic resin, and then uses them in combination with zirconium silicate powder and benzoxazine cross-linking agent, and designs reasonable forming and sintering processes, so that the refractory brick has good properties such as high-temperature stability, oxidation resistance, and thermal shock resistance.

The method for producing a methane-reforming catalyst according to an embodiment of the present application comprises: a step of preparing a solution that comprises a precursor of a perovskite-based compound represented by chemical formula 1; and a step of coating the solution onto a carrier and then performing a heat treatment process so as to produce a catalyst, wherein the precursor of the perovskite-based compound represented by chemical formula 1 comprises strontium hydroxide.

This invention discloses a samarium single-atom and strontium-doped neodymium oxide composite catalyst and its preparation method, as well as a nonylphenol electrochemical sensor and its application. The preparation of the composite catalyst includes adding resorcinol, formaldehyde solution, and Sm(NO3)3·6H2O to an anhydrous ethanol-based colloidal suspension for sol-gel formation, followed by carbonization and etching to obtain Sm-SAC. A first solution containing strontium hydroxide and neodymium nitrate hexahydrate is added dropwise to a second solution containing 1,2,3-triazole, trimesic acid, and polyvinylpyrrolidone to prepare a Sr-Nd bimetallic precursor, followed by annealing to obtain strontium-doped neodymium oxide. Sm-SAC and strontium-doped neodymium oxide are then added to water for ultrasonic dispersion, centrifugation, washing, and drying to obtain the composite catalyst. The composite catalyst of this invention exhibits strong adsorption capacity, high-efficiency electrocatalytic oxidation activity, excellent anti-interference ability, and structural stability. The sensor demonstrates high recovery rate, low signal attenuation, and excellent reusability.

The invention provides a preparation method of high-purity octahydrogen triborate strontium salt. The method comprises the following steps: step 1, mixing and dissolving an octahydrogen triboron sodium salt crude product and water; 2, after dissolving, filtering insoluble substances by using neutral filter paper to obtain an octahydrogen triboron sodium salt crude product solution; step 3, enabling the octahydro triboron sodium salt crude product solution to pass through anion exchange resin, and adsorbing anions B11H14 <-> onto the anion exchange resin; 4, a sulfuric acid solution is used as a resolving agent for leaching and resolving, anion B11H14 <-> is eluted into the solution, and a pure octahydrotriboric acid water solution is obtained; and step 5, dropwise adding a strontium hydroxide aqueous solution into the pure octahydrotriboric acid aqueous solution obtained in the step 4 until the solution is neutral, separating out a strontium octahydrotriborate finished product, filtering, and drying to obtain the strontium octahydrotriborate. The product obtained by the preparation method disclosed by the invention has the characteristics of high purity, simple process flow, economy, environmental protection and suitability for industrial production, and the comprehensive yield can reach 95.0 wt.%.

The invention belongs to the technical field of phase change materials, and discloses a sodium hydroxide hydrate phase change material and a preparation method thereof. The phase change material comprises the following raw materials in parts by mass: 35-50 parts of sodium hydroxide, 0.5-3 parts of a crystallization nucleating agent or a crystallization nucleating agent precursor and 50-65 parts of water, the crystallization nucleating agent comprises at least one of ferrous hydroxide, cobalt hydroxide, manganese hydroxide, chromium hydroxide and strontium hydroxide; the crystal nucleating agent precursor comprises at least one of ferrite, cobalt salt, manganese salt, chromium salt and strontium salt. According to the preparation method, ferrous salt, cobalt salt, manganese salt, chromium salt, strontium salt and other inorganic salts are used as crystallization nucleating agent precursors and can react with sodium hydroxide to generate hydroxides, ferrous hydroxide and other hydroxides have a good crystallization nucleating effect on sodium hydroxide hydrate, and the prepared phase change material has the advantages that the freeze-thaw cycle stability (gt; the phase change enthalpy is high (180J / g); and the method is environment-friendly and non-toxic.

The invention belongs to a method for producing strontium hydroxide and a byproduct sodium thiosulfate by using a strontium sulfide solution, and belongs to the field of chemical engineering. According to the technical scheme, the method comprises the following steps: introducing carbon dioxide-removed air into a strontium sulfide solution to carry out oxidation reaction, carrying out hot filtration, and discarding slag to obtain a red water solution; adding alkali into the red water solution to react, cooling, crystallizing, carrying out solid-liquid separation, and washing to obtain a crude strontium hydroxide octahydrate crystal; recrystallizing the crude strontium hydroxide octahydrate crystal, filtering the solution, cooling and crystallizing, carrying out solid-liquid secondary separation to obtain the strontium hydroxide octahydrate crystal, and drying to obtain a strontium hydroxide octahydrate product; mixing the mother solution with the washing solution, then introducing carbon dioxide-removed air or oxygen for secondary oxidation reaction until the end point is that the red water is completely whitened, and filtering and discarding slag; and carrying out concentration, evaporation, cooling crystallization and centrifugal separation on the white water to obtain sodium thiosulfate pentahydrate crystals. The method comprises the following steps: oxidizing yellow water, adding alkali, filtering, cooling, centrifuging and washing to obtain a crude product, and recrystallizing to obtain a refined product.

This method for producing a positive electrode active material for secondary batteries is characterized by including: an oxidation step of adding at least one hydroxide selected from the group consisting of aluminum hydroxide, strontium hydroxide, titanium hydroxide, bismuth hydroxide, zirconium hydroxide, and barium hydroxide to an Ni-containing compound, and performing oxidation treatment by heating the mixture; a firing step of mixing an oxide obtained in the oxidation step with an Li-containing compound, and firing the mixture; a water-washing step of mixing a fired product obtained in the firing step with water or an aqueous solution, and washing the mixture with water; and a drying step of drying the wet powder obtained in the water-washing step to obtain a lithium transition metal composite oxide, wherein the heating temperature in the oxidation step is 250°C-650°C inclusive.

The present invention relates to a method for providing an ore concentrate solution suitable for mineral processing, the method comprising contacting an ore with one or more metal bases at a high temperature. The one or more metal bases at a high temperature may constitute a super-alkaline medium that partially or completely dissolves the ore. Typically, the one or more metal bases are alkali metal bases, preferably selected from lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, or cesium hydroxide, or alkaline earth bases, preferably selected from calcium hydroxide, barium hydroxide, or strontium hydroxide. The one or more metal bases at a high temperature may constitute a super-alkaline medium that partially or completely dissolves the ore.

The invention discloses a shape-controllable strontium zirconate crystal and a preparation method thereof. The preparation method comprises the following steps: providing an aqueous solution containing strontium hydroxide and zirconium chloride in an oil bath reaction container, and reacting to obtain a mixture; and hermetically heating the mixture at constant temperature to obtain a crystal product. And adjusting the morphology of the obtained crystal product in an oil bath reaction container by adjusting the stoichiometric ratio of strontium and zirconium and optionally adding an additive. In a single water-phase solvent system, the morphology and size of the obtained strontium zirconate powder particles can be regulated and controlled by regulating and controlling the ratio of strontium to zirconium and optionally adding KOH and / or KCl, and the product is complete in crystal structure, uniform in morphology and high in purity.