4 results about "Lanthanide nitrate" patented technology

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.

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.

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.