45 results about "Lanthanum carbonate" patented technology

The invention relates to the field of biomedical application of inorganic materials, in particular to application of lanthanum carbonate in preparation of drugs for resisting liver cirrhosis and inhibiting liver inflammations, the drugs comprise lanthanum carbonate and pharmaceutically acceptable auxiliary materials, the drugs are ground and then mixed with food to prepare a drug mixture, and the drug mixture is prepared into the drug for resisting liver cirrhosis and inhibiting liver inflammations. The mass ratio of the lanthanum carbonate in the medicine mixture is 1-10%, and the mechanism of the lanthanum carbonate for treating the liver cirrhosis is as follows: interference or blocking of activation and proliferation of hepatic stellate cells, inhibition of extracellular matrix generation and promotion of extracellular matrix degradation. According to the invention, a rat liver cirrhosis model is constructed through chemical induction, and the effects of reversing liver cirrhosis and inhibiting liver inflammation are found when a rat is treated by taking lanthanum carbonate orally, so that a new candidate drug is provided for clinical treatment of liver cirrhosis.

The invention discloses application of lanthanum carbonate in treatment of inflammatory bowel diseases, lanthanum carbonate achieves the effect of treating inflammatory diseases by depriving cfDNA, eATP and other proinflammatory factors generated at an inflammatory part, and symptoms induced by IBD are effectively relieved. The lanthanum carbonate disclosed by the invention has a strong cfDNA and eATP removal function, has good biocompatibility, has no direct or indirect toxic action on a human body, has no potential toxicity, and can be used for treating inflammatory bowel diseases.

The invention relates to the field of biomedical application of inorganic materials, in particular to application of lanthanum carbonate in preparation of a medicine for treating hepatic encephalopathy. According to the application of lanthanum carbonate in preparation of the medicine for treating hepatic encephalopathy, the medicine comprises lanthanum carbonate and pharmaceutically acceptable auxiliary materials, the lanthanum carbonate comprises any one or more of lanthanum carbonate hydrate and basic lanthanum carbonate, the medicine is ground and then mixed with food to prepare a medicine mixture, and the medicine mixture is prepared into the medicine for treating hepatic encephalopathy. The mass ratio of the lanthanum carbonate in the medicine mixture is 1-10%. According to the application, the blood ammonia is reduced based on the glutaminase, the hepatic encephalopathy is reversed by reducing the blood ammonia and systemic inflammation, and the liver function is recovered by regulating the inflammation, so that the hepatic encephalopathy is favorably cured, a good treatment effect is shown, and a new candidate medicine is provided for clinically treating the hepatic encephalopathy.

The invention discloses a protein / polysaccharide composite dialysis membrane based on in-situ loaded lanthanum carbonate and application of the protein / polysaccharide composite dialysis membrane, a lanthanum carbonate loaded protein / polysaccharide composite aggregate is used for modifying a porous filter membrane, and the dialysis membrane with a lanthanum carbonate loaded protein / polysaccharide self-assembled membrane as a compact skin layer and the porous filter membrane as a supporting layer is formed. By integrating a membrane separation mechanism of hemodialysis and an adsorption principle of blood perfusion, the skin layer of the dialysis membrane has molecular sieve separation and chemical adsorption functions, efficient removal of molecular uremic toxins (phosphorus, creatine liver, bilirubin, p-cresol sulfate and indol sulfate) with different sizes is synergistically realized, macromolecular proteins in blood are effectively intercepted by pore size screening, and the dialysis membrane has the advantages of simple structure, low cost and high efficiency. According to the present invention, by using the adsorption effect of the functional group on the surface of the membrane, the high removal rate on the protein-bound urotoxin is achieved, the high removal effect on phosphorus is particularly achieved, the blood compatibility is considered, the large-scale preparation is easily achieved, and the new idea is provided for the development of the high-performance blood purification material.

The application discloses a basic lanthanum carbonate particle and a preparation method thereof. The basic lanthanum carbonate particle has an ellipsoidal appearance, a particle size of 1-4.5 microns, and a particle size distribution alpha satisfying the condition of 1.1<=alpha<=1.5. The preparation method can produce the basic lanthanum carbonate particle on a large scale under mild conditions.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.

The invention relates to the field of photocatalysts, in particular to a lanthanum oxycarbonate-gallium oxide composite photocatalyst for catalytic reduction of carbon dioxide and a preparation method thereof.The preparation method comprises the following steps that S1, sodium carbonate, sodium fluoride and lanthanum nitrate hexahydrate are dissolved in deionized water and stirred and mixed at the room temperature, then a hydrothermal reaction is conducted, and a precursor is obtained; after cooling, filtering, washing and drying in sequence to obtain a sodium lanthanum carbonate precursor; s2, weighing gallium nitrate, mixing with the sodium lanthanum carbonate precursor, grinding, and uniformly mixing to obtain a composite precursor; and S3, in a protective atmosphere, carrying out temperature programming treatment on the composite precursor, and naturally cooling to room temperature to obtain the lanthanum oxycarbonate-gallium oxide composite photocatalyst. The photocatalytic CO2 reduction performance of the composite photocatalyst prepared by the invention is superior to that of single lanthanum oxycarbonate and gallium oxide catalysts, and the composite photocatalyst shows excellent application potential.

The invention provides a production method of lanthanum zirconate, and belongs to the technical field of inorganic non-metallic materials. According to the invention, an electric smelting method is adopted, during high-temperature smelting, a zirconia material and lanthanum oxide / lanthanum carbonate are fully subjected to a high-temperature liquid phase chemical reaction at high temperature, an all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be obtained, and the all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be processed into particle size sand and fine powder with various particle sizes or can be processed into crushing and grading powder for a high-temperature thermal barrier coating material according to the requirements of users. Compared with a La2Zr2O7 material prepared by a solid-phase reaction method, a precipitation method, a sol-gel method, a self-propagating combustion method, a hydrothermal synthesis method and the like, the lanthanum zirconate prepared by the method provided by the invention is high in volume density and low in porosity, can be processed into particles and fine powder / graded powder with various particle size levels, is good in high-temperature volume stability, and can be used for preparing the lanthanum zirconate material. As an electric melting material, the material has the characteristics of small reheating shrinkage and small high-temperature creep deformation.

The application relates to the biomedical application field of inorganic materials, and particularly relates to application of lanthanum carbonate in preparation of a medicine for treating hepatic encephalopathy. The application relates to application of lanthanum carbonate in preparation of a medicine for treating hepatic encephalopathy, wherein the medicine comprises lanthanum carbonate and pharmaceutically acceptable adjuvants, and the lanthanum carbonate comprises any one or more of lanthanum carbonate hydrate and basic lanthanum carbonate. The application is based on the fact that glutamine enzyme can reduce blood ammonia, and the hepatic encephalopathy is reversed by reducing blood ammonia and systemic inflammation, the liver function is recovered by regulating inflammation, thereby helping to cure the hepatic encephalopathy, and good treatment effect is shown, so that a new candidate medicine for clinically treating the hepatic encephalopathy is provided.

The application discloses a method for preparing hexagonal hydroxyl carbonate lanthanum by hydrothermal synthesis, which comprises the following steps: diluting lanthanum chloride solution as a bottom liquid with deionized water and adding lanthanum carbonate as a crystal seed in a precipitation reactor; adding a feed liquid and a precipitator into the precipitation reactor by using a parallel flow precipitation mode, generating lanthanum carbonate after precipitation reaction, controlling the input speed of the feed liquid and the precipitator to control the precipitation reaction time and adjust the pH value; taking out the precipitate lanthanum carbonate in the precipitation reactor, drying after filtration to obtain lanthanum carbonate as a precursor; adding the lanthanum carbonate and deionized water into a reactor to perform a hydrothermal synthesis reaction, washing the obtained final product with deionized water, and performing suction filtration or centrifugation to obtain a white solid; and placing the white solid in an oven, drying to obtain hexagonal hydroxyl carbonate lanthanum. The production process is simple, and the method is suitable for industrialized batch production of hexagonal hydroxyl carbonate lanthanum.

The application discloses a rare earth doped alumina-titanium spraying material, a coating thereof and a preparation method thereof, and belongs to the technical field of rare earth materials. The material is prepared from the following raw materials in parts by weight: lanthanum cerium carbonate 0.01-5 parts, titanium oxide 3-40 parts, hydroxyethyl cellulose 0.1-2 parts, dodecylbenzyl ammonium chloride 0.01-0.5 parts, n-heptane 1-3 parts, deionized water 150-220 parts, alumina 100 parts and peach gum powder 0.05-3 parts. The preparation method comprises the following steps: mixing part of the raw materials, placing the mixed raw materials in a nano sand mill and performing normal-temperature cyclic fine grinding, stirring the obtained mixed slurry in a peach gum powder aqueous solution at normal temperature, performing spray granulation, and performing high-temperature calcination on the obtained precursor powder to obtain the product. Compared with the prior art, the rare earth doped alumina-titanium spraying material prepared by the application has the advantages of low preparation cost, controllable particle size, good fluidity, high hardness of the obtained coating and good wear resistance.

The invention belongs to the technical field of rare earth hydrometallurgy, and discloses a preparation method of lanthanum cerate for a reflective thermal insulation coating. Specifically, a molecular mixing reactor (supergravity) and autoclave (aging reaction) combined process is adopted, and sodium dodecyl benzene sulfonate, polyethylene glycol, polyvinylpyrrolidone and the like are adopted as dispersing agents, so that the problems that solid-phase preparation particles are relatively large, the local mixed alkali amount of a liquid phase is too large and the like are solved; the uniform mixing of the precipitant and lanthanum cerium ions and the preparation of nanoscale lanthanum cerate are realized; lanthanum carbonate cerium, lanthanum carbonate, ammonia water and ammonium bicarbonate are adopted as main raw materials of the process, so that the production cost is reduced from the raw materials.

This application relates to the technical field of catalyst preparation, specifically disclosing a highly stable and active methanation catalyst for syngas and its preparation method. The method includes the following steps: dissolving nickel and manganese salts in water to obtain solution A; mixing lanthanum carbonate tetrahydrate or lanthanum and cerium carbonate, polyethylene glycol 400, and water uniformly to obtain mixture B; uniformly dispersing composite powder and calcium salt in water, adding mixture B, adjusting pH, heating, aging, simultaneously adding solution A and carbonate solution, dynamically adjusting pH, aging, solid-liquid separation, washing, and drying to obtain a pre-supported body; sequentially impregnating the pre-supported body with potassium salt solutions of increasing concentration, drying, calcining, and cooling to obtain a catalyst precursor; uniformly kneading the catalyst precursor, binder, release agent, and water, followed by molding, curing, drying, reduction, and passivation to obtain the final catalyst. The catalyst prepared in this application exhibits excellent CO and CO2 conversion rates and CH4 selectivity.

The application belongs to the field of rare earth smelting, and particularly discloses a preparation method of low-chlorine precipitated lanthanum carbonate, which comprises the following steps: preparing a precipitant, a mixed solution of sodium bicarbonate and sodium carbonate and an additive A; adding bottom water and crystal seeds into a reaction tank; preparing a material solution, adding an additive B into the lanthanum chloride material solution; under heating, the precipitant and the material solution are added into the reaction tank in a parallel flow mode; after the reaction is completed, the precipitate is filtered out and washed with clean water for more than five times, and the obtained product is placed into an oven for drying. The obtained product is the low-chlorine precipitated lanthanum carbonate with REO of 52-56%, chlorine ions of 0.005%-0.015% and calcium ions less than 0.015%. The preparation method has the advantages of simple process and convenient operation, and can prepare the low-chlorine and low-calcium lanthanum carbonate from the high-concentration and high-calcium-content lanthanum chloride material solution used in industrial production; and the precipitated lanthanum carbonate has very low contents of chlorine ions and calcium ions, and can meet the requirements of the La2O3-4N grade in the national standard GB / T 4154-2015 after calcination.

This invention belongs to the field of polymer composite materials technology, specifically relating to a method for preparing and applying an antibacterial agent for ABS composite materials. The method involves reacting lanthanum acetate, sodium carbonate, anhydrous ethanol, and deionized water in a reactor to obtain solution A. Solution A is then filtered, washed, dried, and cooled to obtain lanthanum carbonate. The lanthanum carbonate is then calcined to obtain lanthanum oxide. Lanthanum oxide, linalool, 3-isocyanopropyltrimethoxysilane, anhydrous ethanol, and deionized water are reacted to obtain an antibacterial agent of the linalool / 3-isocyanopropyltrimethoxysilane / lanthanum oxide type. This antibacterial agent is then used in ABS to prepare antibacterial ABS composite materials. The antibacterial agent of this invention inhibits the metabolic activity of bacteria by interfering with their respiratory chain function. Furthermore, lanthanum ions, with their high positive charge density, adsorb onto the bacterial cell membrane surface, disrupting normal cellular physiological functions and thus killing the bacteria.

The invention relates to the technical field of high-temperature alloy precision casting, and discloses a gas turbine blade high-temperature alloy casting method which comprises the following steps: sequentially carrying out lanthanum nitrate dip-coating pretreatment and ammonium carbonate curing treatment on the inner wall of a shell, and converting lanthanum nitrate into a lanthanum carbonate solid interface layer in situ; sequentially dip-coating lanthanum borate surface layer slurry and gadolinium oxide isolation layer slurry on the curing layer to complete shell preparation; dewaxing, sintering and curing the shell at high temperature; high-temperature alloy molten metal is poured into the shell, and metallurgical bonding is formed between the lanthanum borate surface layer and the surface of the casting; keeping the lanthanum borate active layer on the surface of the leaf after shelling; and oxalate-phosphate composite sealing treatment is carried out on pores in the surface layer of the blade. According to the method, integration of casting forming and CMAS-resistant protective layer forming is achieved, the protective layer and the blade base body are metallurgically bonded, the bonding strength is high, micropores in the surface layer of the blade are effectively sealed, and a CMAS permeation channel is blocked.

This invention provides a lanthanum carbonate pharmaceutical composition and its application in the treatment of hyperphosphatemia, belonging to the field of pharmaceutical technology. The lanthanum carbonate pharmaceutical composition provided by this invention comprises lanthanum carbonate and ethylenediaminetetraacetic acid (EDTA)-crosslinked β-cyclodextrin, wherein the mass ratio of lanthanum carbonate to EDTA-crosslinked β-cyclodextrin is 1:0.2–5.0. The lanthanum carbonate pharmaceutical composition provided by this invention can reduce or even block the absorption of lanthanum ions into the bloodstream without affecting the phosphorus-lowering effect of lanthanum carbonate. Test results show that lanthanum carbonate granules prepared using the lanthanum carbonate pharmaceutical composition provided by this invention, compared with commercially available lanthanum carbonate granules, can prevent the absorption of lanthanum ions into the bloodstream, thus solving the problem that while lanthanum carbonate exerts its phosphorus-lowering effect in the gastrointestinal tract, trace amounts of lanthanum ions are still absorbed into the bloodstream, causing lanthanum accumulation in the body and bone poisoning.

The application relates to the technical field of precision casting of high-temperature alloys, and discloses a high-temperature alloy casting method for a gas turbine blade, which comprises the following steps: sequentially performing lanthanum nitrate immersion coating pretreatment and ammonium carbonate solidification treatment on the inner wall of a mold shell, converting the lanthanum nitrate into a lanthanum carbonate solid interface layer in situ; sequentially immersing and coating lanthanum borate surface layer slurry and gadolinium oxide isolation layer slurry on the solidification layer to complete mold shell preparation; performing dewaxing and high-temperature sintering on the mold shell; pouring high-temperature alloy liquid into the mold shell, forming metallurgical bonding between the lanthanum borate surface layer and the surface of the casting; leaving the lanthanum borate active layer on the surface of the blade after shell removal; and performing oxalate-phosphate composite sealing treatment on the surface layer pores of the blade. The application realizes the integration of casting and the formation of a CMAS-resistant protective layer, the protective layer is metallurgically combined with the blade substrate, the combination strength is high, the surface layer micropores of the blade are effectively sealed, and the CMAS infiltration channel is blocked.

This invention discloses a method for removing white phosphorus from soil. First, contaminated soil is mixed evenly with water, stirred, and then nitric acid solution is added. After stirring, a phosphorus removal agent is added, and stirring continues. The mixture is then filtered, freeze-dried, and the phosphorus removal agent is removed using a magnetic sieve to obtain treated soil. The phosphorus removal agent contains nano-ferric oxide, allowing it to separate from the soil via magnetic attraction after treating the white phosphorus, reducing the difficulty of separation and enabling reuse. The soil is treated with nitric acid, causing the white phosphorus to react with the nitric acid to produce phosphate ions. The addition of the phosphorus removal agent releases lanthanum carbonate from the surface. Lanthanum has strong Lewis acidity and can form strong ligands with phosphate, which has Lewis basicity, to adsorb phosphate ions from the soil, thus forming a complex. Simultaneously, the free amino groups on the chitosan surface can adsorb metals, further completing the adsorption of the complex.

The invention discloses a magnetic adsorbent for refining ester base oil and preparation and application methods thereof, the adsorbent comprises a magnetic material formed by compounding basic lanthanum carbonate and magnetic particles, the magnetic material is spherical, the sphere diameter is 150-600 nm, and the magnetic material can be rapidly separated from oil liquid under the action of an external magnetic field. The magnetic basic lanthanum carbonate adsorbent disclosed by the invention has high adsorption capacity and selectivity on acidic substances and various polar impurities in ester base oil; the oil-water separator has strong magnetism and can be quickly and thoroughly separated from oil under the action of an external magnetic field; and the preparation process is simple and easy for large-scale production.

This invention relates to a hexagonal basic lanthanum carbonate and its preparation method, belonging to the field of rare earth compound technology. It addresses at least one of the problems of existing methods for synthesizing hexagonal basic lanthanum carbonate, including the presence of impurity phases in the product, dependence on high-temperature and high-pressure synthesis conditions, high cost and energy consumption, long reaction cycles, and low production efficiency, which are unfavorable for large-scale continuous production. This invention uses a lanthanum salt solution and a mixed precipitant, controlling the molar ratio of NH3·H2O and ammonium bicarbonate in the mixed precipitant, as well as the ratio of the total amount of NH3·H2O and ammonium bicarbonate added to water to the amount of lanthanum ions, to carry out the precipitation reaction and aging. Under normal pressure and mild conditions, a single-phase hexagonal basic lanthanum carbonate is prepared, avoiding the high energy consumption and safety hazards caused by high-temperature and high-pressure conditions. The process is simple and suitable for large-scale production.

The application discloses a rare earth doped yttrium zirconium oxide spraying material and a coating preparation method and application, and belongs to the field of rare earth material preparation. The rare earth doped yttrium zirconium oxide spraying material comprises lanthanum cerium carbonate, yttrium carbonate, aluminum oxide, hydroxyethyl cellulose, dodecyl benzyl ammonium chloride, n-heptane, deionized water, peach gum powder and zirconium oxide; the mixed slurry is obtained by mixing and ball milling the components in the spraying material, then the mixed slurry is mixed and stirred with the peach gum powder, and then the rare earth doped yttrium zirconium oxide spraying material coating is obtained through spray granulation and plasma spraying. Compared with the original yttrium zirconium oxide spraying powder, the yttrium zirconium oxide is modified by using the lanthanum cerium carbonate and the aluminum oxide, the wear resistance of the spraying powder is improved, the original white coating can be changed into black, and the application prospect is achieved in the fields of electronic ceramics, cutters and gas nozzles.

The present application relates to the technical field of oxy-lanthanum carbonate, and discloses an oxy-lanthanum carbonate catalyst, a preparation method and application thereof, the oxy-lanthanum carbonate catalyst comprising hexagonal crystal phase oxy-lanthanum carbonate and hexagonal crystal phase oxy-lanthanum carbonate containing doping element R.The method comprises the following steps: (1) adding an alkali solution into a solution of a lanthanum source, and then performing solid-liquid separation and drying to obtain lanthanum hydroxide; (2) contacting a solution containing a compound of doping element R with the lanthanum hydroxide, and then performing drying; (3) performing calcination on the dried product of step (2) in a carbon-containing atmosphere to obtain the oxy-lanthanum carbonate catalyst.The catalyst prepared by the present application has a high carbon dihydrocarbon yield when used in a methane oxidative coupling reaction.

The application discloses a preparation method of thin sheet four-water lanthanum carbonate powder crystal based on microwave / ultrasonic technology, which comprises the following steps: (1) preparation of eight-water lanthanum carbonate, slowly drop sodium bicarbonate solution into lanthanum chloride solution, fully react for 2-5 hours at a reaction temperature of 30 DEG C; then, the final product is washed with water, filtered and dried to prepare eight-water lanthanum carbonate powder; (2) preparation of thin sheet four-water lanthanum carbonate powder crystal, the eight-water lanthanum carbonate powder prepared in the step (1) is placed in a solvent medium at room temperature, different microwave intensities are regulated to carry out rapid dehydration treatment; then, the product is peeled by means of high-frequency ultrasonic vibration, centrifuged and dried to obtain four-water lanthanum carbonate powder crystal product. The four-water lanthanum carbonate is prepared by means of microwave / ultrasonic technology, which can avoid the generation of basic lanthanum carbonate impurities, and the obtained four-water lanthanum carbonate is thin sheet and uniform in dispersion, and the purity is more than 99.5%.

This application provides a method for determining the in vitro phosphorus binding capacity of lanthanum carbonate chewable tablets, belonging to the field of mass spectrometry for separating substances into individual components for analytical testing. The method involves preparing a phosphate stock solution, pH medium, working linear standard solution, and test solution. ICP-MS is used to detect the working linear standard solution and the test solution, and the phosphorus binding capacity is calculated. Applying this method to the in vitro phosphorus binding capacity testing offers advantages such as simplicity, convenience, stability, high accuracy, and significantly improved sensitivity.

The present application relates to the technical field of oxy-lanthanum carbonate, and discloses an oxy-lanthanum carbonate catalyst, a preparation method and application thereof, the oxy-lanthanum carbonate catalyst comprising hexagonal crystal phase oxy-lanthanum carbonate and hexagonal crystal phase oxy-lanthanum carbonate containing a doping element.The method comprises the following steps: (1) adding an alkali solution into a solution of a lanthanum source, then performing aging, solid-liquid separation and drying to obtain lanthanum hydroxide; (2) under a protective atmosphere, contacting a solution of a compound containing a doping element with the lanthanum hydroxide, and then performing drying; (3) performing calcination on the dried product of step (2) under an atmosphere containing CO2 to obtain the oxy-lanthanum carbonate catalyst.The catalyst prepared by the present application has a high carbon dihydrocarbon yield when used in a methane oxidative coupling reaction.

The invention discloses a preparation method of an additive type nitrogen-phosphorus-lanthanum synergistic flame-retardant polyurethane elastomer, which is prepared by compounding isocyanate as a hard segment and polybutylene glycol as a soft segment with a phosphorus-nitrogen flame retardant and lanthanum carbonate, the preparation method is simple, the process is easy to control, when the prepared polyurethane elastomer burns, the phosphorus-nitrogen flame retardant isolates oxygen free radicals to form a blocking layer, lanthanum coordination bonds break to generate lanthanum oxide to consume oxygen and cover the surface of polyurethane, carbonate is decomposed to release carbon dioxide to dilute oxygen, and the phosphorus-nitrogen flame retardant, the lanthanum oxide and the carbonate synergistically prevent polyurethane from burning, so that the flame-retardant performance of the polyurethane elastomer is improved. The limit oxygen index of the flame-retardant material reaches 35.2, and the commercial standard of the flame-retardant material and the UL-94 V-0 flame-retardant grade requirement are met; in addition, the polyurethane elastomer also has good mechanical properties, and the tensile strength of the polyurethane elastomer can reach 27.9 MPa.

A lanthanum oxycarbonate catalyst, and a preparation method therefor and an application thereof are provided. The lanthanum oxycarbonate catalyst contains a rod-shaped lanthanum oxycarbonate catalyst and a substantially parallelepiped lanthanum oxycarbonate catalyst. The lanthanum oxycarbonate catalyst can be used for efficiently performing a methane oxidative coupling reaction at a relatively low temperature.

The invention relates to the technical field of industrial furnace coatings, in particular to a rare earth doped composite solid solution energy-saving coating and a preparation method thereof.The rare earth doped composite solid solution energy-saving coating is prepared from, by weight, 100 parts of powder base material, 0.1-1 part of dispersing agent and 100-200 parts of binding agent; wherein the powder base material comprises the following raw materials in parts by weight: 60-80 parts of lanthanum cerium carbonate, 3-5 parts of cerium carbonate and 10-20 parts of neodymium iron boron waste residues; the powder base material is prepared by mixing cerium lanthanum carbonate, cerium carbonate, neodymium iron boron waste residues and an auxiliary agent and then performing high-temperature calcination. The invention provides a rare earth doped composite solid solution energy-saving coating which is a novel energy-saving material applied to an industrial furnace, is sprayed on the surface of a refractory material of a high-temperature kiln to form a layer of hard ceramic glaze shell, and plays roles in protecting a furnace body, prolonging the service life of the kiln, reflecting infrared heat energy in a hearth and improving the combustion rate of the kiln.

The invention discloses a preparation method of lanthanum carbonate particles, and belongs to the field of pharmacy. The lanthanum carbonate particles comprise the following raw material medicines: lanthanum carbonate, starch hydrolyzed oligosaccharide, colloidal silicon dioxide and magnesium stearate; the preparation method comprises the operation steps of premixing 1, dispersing, premixing 2, dry granulation, total mixing and sub-packaging. The lanthanum carbonate particles prepared by accurately weighing the material components according to the weight ratio and carrying out the operation steps of premixing 1, dispersing, premixing 2, dry granulation, total mixing and the like on the raw and auxiliary materials are relatively good in content uniformity and stable in content.