13 results about "Lanthanide nitrate" patented technology

The invention discloses a La2O3-ZnO-NiO / ZrO2 oxygen carrier as well as a preparation method and application thereof, and belongs to the technical field of ammonia decomposition. According to the technical scheme, the method comprises the following steps: 1) synthesis of a ZrO2 carrier: adding NH3.H2O into a zirconyl nitrate solution to induce precipitation; 2) preparation of La2O3 / ZrO2: adding lanthanum nitrate hexahydrate and urea to obtain a precipitate, drying the precipitate, and finally calcining the precipitate; 3) preparation of La2O3-ZnO / ZrO2: adding zinc nitrate hexahydrate and urea, standing to obtain a precipitate, drying and calcining; and 4) preparation of La2O3-ZnO-NiO / ZrO2: adding NH3.H2O, then adding nickel acetate and thiourea, reacting, drying, and calcining twice to obtain the target product. Lattice oxygen in the oxygen carrier is used for catalytic oxidation of ammonia decomposition, the oxygen carrier can be recycled for multiple times, and the method is suitable for industrial application in the future.

The invention discloses an industrial flue gas denitration filter bag and a preparation method thereof, and relates to the technical field of flue gas denitration. The industrial flue gas denitration filter bag comprises PTFE (Polytetrafluoroethylene) fibers, PPS (Polyphenylene Sulfide) fibers, PI (Polyimide) fibers and PTFE loaded fibers. Wherein the PTFE loaded fiber is a PTFE fiber layer loaded with a modified molecular sieve catalyst; the modified molecular sieve catalyst takes a molecular sieve coated with modified nanorods as a carrier, a vanadium-titanium composite oxide as an active catalytic component and a cerium-titanium composite oxide as a co-catalytic component; the modified nanorod is a molybdenum-tungsten composite oxide modified cerium dioxide nanorod. By introducing the modified molecular sieve catalyst prepared from cerium dioxide nanorods, lanthanum nitrate, molybdenum trioxide and other raw materials, the denitration capacity, the ammonia escape prevention capacity, the sulfur poisoning resistance, the hydrothermal stability and the working life are further improved, and an active temperature window is widened. Therefore, the method has a wider application prospect.

The application discloses a preparation method and application of a supported nickel-based catalyst, and relates to the technical field of catalysts, in particular to a preparation method of a supported nickel-based catalyst.The method comprises the following steps: mixing and stirring nickel nitrate hexahydrate and lanthanide nitrate, adding a biomass template agent in the stirring process, and obtaining a wet gel through water bath heating, wherein the molar ratio of C6 of the biomass template agent to the total mass of the nickel nitrate hexahydrate and the lanthanide nitrate is 1.5:1-5:1; drying, pre-calcining, calcining, activating and passivating the wet gel to obtain the supported nickel-based catalyst, and the pre-calcining temperature is 300-500 DEG C.The preparation method is simple, and the high specific surface area can effectively strengthen hydrogen dissociation and adsorption and activation of substrate molecules such as glucose, so that efficient conversion of glucose and maleic anhydride is realized.

This invention relates to an antibacterial medical care pad and its manufacturing process. From top to bottom, it comprises a soft layer, an antibacterial layer, an absorbent layer, and a breathable layer. The antibacterial layer, by weight, comprises the following components: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The absorbent layer, by weight, comprises the following components: 100 parts acrylic resin, 10-15 parts viscose fiber, 15-20 parts long-staple cotton, and 3-8 parts antibacterial agent. The nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5). The antibacterial core shell comprises the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, and carboxymethyl chitosan. This invention improves the antibacterial performance of the pad by placing an antibacterial layer between the soft layer and the absorbent layer. The addition of an antibacterial agent to the absorbent layer enhances its antibacterial performance, thereby reducing the overall antibacterial performance of the pad. Furthermore, the breathable layer facilitates the timely removal of moisture, reducing patient discomfort.

The application discloses a La2O3-ZnO-NiO / ZrO2 oxygen carrier and a preparation method and application thereof, and belongs to the technical field of ammonia decomposition. The technical scheme comprises the following steps: 1) synthesis of a ZrO2 carrier: adding NH3H2O into a zirconyl nitrate solution to induce precipitation; 2) preparation of La2O3 / ZrO2: adding lanthanum nitrate hexahydrate and urea to obtain a precipitate, drying and finally calcining; 3) preparation of La2O3-ZnO / ZrO2: adding zinc nitrate hexahydrate and urea, standing to obtain a precipitate, drying and calcining; and 4) preparation of La2O3-ZnO-NiO / ZrO2: adding NH3H2O, then adding nickel acetate and thiourea, reacting, drying and twice calcining to obtain a target product. The application adopts lattice oxygen in the oxygen carrier to catalyze and oxidize ammonia gas decomposition, the oxygen carrier can be used repeatedly, and is suitable for future industrial application.

The application discloses a preparation method of a benzoxathiazinone derivative and belongs to the technical field of organic synthesis. The method uses benzodisulfone and an epoxide compound as reaction raw materials, and under the action of a catalytic system composed of lanthanum nitrate hexahydrate and tributyl phosphine, potassium carbonate is used as an alkali, acetonitrile is used as a solvent, and the reaction is carried out under heating, and then column chromatography is used for separation and purification, so that the target seven-membered sulfur heterocyclic compound is obtained. The synergistic catalytic mechanism formed between the lanthanum nitrate hexahydrate and the organic phosphine effectively overcomes the problem of the regioselective ring opening of the epoxide compound, and realizes the efficient and high-selectivity cyclization of the benzodisulfone and the epoxide compound. The synthetic route has mild reaction conditions, does not need inert gas protection, is simple in operation, and has good functional group compatibility, and provides an efficient and practical technical path for constructing novel benzoxathiazinone derivatives.

The invention relates to the technical field of catalysts, in particular to a preparation method and application of a lanthanide-regulated amorphous iron-based MOF bifunctional catalyst, and the preparation method comprises the following steps: firstly, weighing iron nitrate nonahydrate, lanthanide nitrate and chloride hydrate, and dissolving in ethanol to serve as a precursor of a metal center; dissolving 2-methylimidazole serving as an organic ligand in ethanol; and finally, placing the foamed nickel in a mixed solution of the two solutions, stirring at room temperature, washing with water for multiple times, and drying in vacuum to obtain the lanthanide-regulated amorphous iron-based MOF bifunctional catalyst. The catalyst prepared by the invention shows excellent catalytic performance in the field of full water splitting. For HER, La-FeMOF shows very high current density which exceeds 1903 mA * cm <-2 > and is about 1.5 times (1323 mA cm <-2 >) of commercial Pt / C performance under the same overpotential; and for OER, the current density is up to 2022 mA. Cm <-2 >. The catalyst prepared by the method also has excellent reaction stability, is low in cost, economical and environment-friendly, and has a wide application prospect in the field of complete water splitting.

The invention relates to the technical field of wastewater treatment, in particular to a multi-effect composite fluorine removal agent and application thereof in wastewater treatment, and the multi-effect composite fluorine removal agent comprises the following raw materials in parts by weight: 60-80 parts of attapulgite, 40-60 parts of a composite additive, 20-30 parts of polyaluminum chloride and 20-30 parts of polyferric chloride. In the preparation process of the fluorine removal agent, after the composite additive is added, a three-dimensional network structure with a high specific surface area is constructed by modified powder in the base material and the multi-walled carbon nanotubes, rich adsorption channels are provided for fluorine ions, and graphene oxide and sodium alginate in the auxiliary material form a stable gel skeleton; rare earth elements such as lanthanum nitrate, zirconium oxychloride and the like provide specific fluorine binding sites, the aluminum-magnesium hydrotalcite further enhances the ion exchange capacity, and due to the multi-mechanism synergistic effect, the fluorine removal agent can still keep high adsorption efficiency in complex water.

The invention belongs to the technical field of organic monomer synthesis, and particularly relates to a method for continuously preparing N-hydroxyethyl acrylamide. The method comprises the following steps: by taking ethylene oxide and acrylamide as raw materials, firstly, putting novel aluminum oxide loaded pellets into a tubular reactor, setting the temperature of the tubular reactor, pumping acrylamide into a pipeline, adjusting a back pressure valve to carry out back pressure, then pumping ethylene oxide into the pipeline, and reacting at 90-150 DEG C; and after the reaction is finished, separating to obtain the N-hydroxyethyl acrylamide. The novel alumina-loaded pellet takes a gamma-Al2O3 pellet as a carrier, and takes lanthanide oxide nitrate and alkali metal nitrate oxide as loading raw material components. According to the method, the reaction temperature is reduced, and the problems of HEAA polymerization, more kettle residues and the like are avoided; operation is simple, the yield is stable, separation is easy, and energy consumption is remarkably reduced; industrialization and full-automatic control are easy to realize, and the production cost is greatly reduced.

This invention discloses a method for synthesizing lanthanide-dominated high-entropy alloys and their application in the electrochemically induced polymerization of tetracycline-based pollutants, belonging to the fields of environmental functional materials and advanced wastewater treatment technology. Using lanthanum nitrate, cobalt nitrate, nickel nitrate, copper nitrate, and manganese nitrate as metal sources, and citric acid as a complexing and reducing agent, a high-entropy alloy powder with a single solid solution phase of La-Co-Ni-Cu-Mn is prepared through a sol-gel combined with inert atmosphere high-temperature calcination. The working electrode, prepared by coating this powder onto a conductive substrate, can be used for the electrochemically induced polymerization and transformation of tetracycline-based pollutants (such as chlortetracycline, tetracycline, and doxycycline). At low current densities, this electrode can rapidly convert tetracycline-based pollutants in water into insoluble polymers, achieving efficient and thorough removal of pollutants through simple filtration, effectively avoiding the drawbacks of traditional mineralization technologies such as high energy consumption, easy generation of toxic intermediate products, and CO2 emissions. This invention provides a green, efficient, and universally applicable new material and method for the advanced treatment of antibiotic-containing wastewater.

This invention provides a detection reagent for an online fluoride ion monitoring instrument and its preparation method. The detection reagent includes reagent A and reagent B. Reagent A is an aqueous solution containing alizarin aminocarboxylic acid complexing agent and sodium acetate, and reagent B is an aqueous solution containing lanthanum nitrate, glacial acetic acid, and Triton. Reagent A, by adding sodium acetate, makes the aqueous solution weakly alkaline, allowing the powdered alizarin aminocarboxylic acid complexing agent, which is difficult to dissolve directly in neutral distilled water, to dissolve rapidly. In reagent B, Triton is added as an adjuvant to promote the complete dissolution of the alizarin aminocarboxylic acid complexing agent and the chromogenic substance, preventing solution turbidity and increasing solution clarity. Furthermore, the preparation of the detection reagent does not require attention to pH value, and it has the advantages of simple preparation, stable color development, and easy cleaning.

The application discloses a preparation method of a benzoxathiazinone derivative and belongs to the technical field of organic synthesis. The method uses benzodisulfone and an epoxide compound as reaction raw materials, and under the action of a catalytic system composed of lanthanum nitrate hexahydrate and tributyl phosphine, potassium carbonate is used as an alkali, acetonitrile is used as a solvent, and the reaction is carried out under heating, and then column chromatography is used for separation and purification, so that the target seven-membered sulfur heterocyclic compound is obtained. The synergistic catalytic mechanism formed between the lanthanum nitrate hexahydrate and the organic phosphine effectively overcomes the problem of the regioselective ring opening of the epoxide compound, and realizes the efficient and high-selectivity cyclization of the benzodisulfone and the epoxide compound. The synthetic route has mild reaction conditions, does not need inert gas protection, is simple in operation, and has good functional group compatibility, and provides an efficient and practical technical path for constructing novel benzoxathiazinone derivatives.

The invention discloses a method for preparing an iron-based catalyst by using iron-oxidizing microorganisms and application of the iron-based catalyst. The preparation method of the iron-based catalyst comprises the following steps: adding CaO into animal waste, adjusting the pH value, drying and sieving; the method comprises the following steps: preparing an impregnation liquid, inoculating iron-oxidizing microorganisms with a volume ratio of 3%-5% into the impregnation liquid, culturing until the content of ferrous ions in the impregnation liquid is lower than 0.1 g / L, namely culturing completely, and then adding lanthanum nitrate into the impregnation liquid; adding the animal waste into the steeping liquor, enabling the steeping liquor to submerge the animal waste, stirring for a period of time, and fixing the iron-based catalyst on a carrier of the animal waste; and carrying out solid-liquid separation on the fixed iron-based catalyst, and drying the separated precipitate to obtain an iron-based catalyst finished product. According to the preparation method, the preparation process is simplified, the production cost is reduced, and the preparation method is an environment-friendly preparation method for preparing the catalyst and has remarkable industrial application value and wide popularization prospects.