15 results about "Strontium hydroxide octahydrate" patented technology

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 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 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.

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.

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.