5results about How to "Improve complexation ability" patented technology

The application relates to the technical field of phosphating aids, and discloses an aid for reducing phosphating sediment and a preparation method, which is composed of the following raw materials in percentage by weight: organic phosphonic acid sediment inhibitor 20-40%, high-molecular dispersant 10-25%, complexing stabilizer 5-15%, pH buffer 2-8%, oxidant 1-5%, surfactant 0.5-3%, and the balance is deionized water. Through the synergistic effect of the core components, the organic phosphonic acid sediment inhibitor and the high-molecular dispersant, a multiple protective barrier of "inhibiting nucleation, resisting scale growth and dispersing and stabilizing" is constructed, so that the generation and adhesion of the sediment are fundamentally reduced.

The invention provides a supercritical CO2 membrane extraction method for strategic metal in fly ash, and relates to the technical field of solid waste resource utilization and environmental protection. The TBP and DEHCNPB composite chelating agent is adopted and matched with the ethanol-methanol composite modifier, so that the compatibility of strategic metal ions and supercritical CO2 is remarkably improved, and the complexing ability is enhanced; according to the method, supercritical CO2 is used as an extraction agent, CO2 can be recycled, no solvent is left, mechanical activation pretreatment is conducted, the stable structure of strategic metal in the fly ash is damaged, the extraction efficiency is greatly improved, the extraction rate of strategic metal such as rare earth elements, lithium and gallium reaches 90% or above, and the extraction rate of rare earth elements such as Nd and Eu can exceed 97%. Through the selective screening effect of the polyimide graphene composite membrane, precise grading separation of different strategic metals is achieved, the separation purity reaches 98% or above, and the problems that a traditional process is poor in selectivity and tedious in subsequent separation are solved.

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

The application provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a nickel foam substrate and a copper-nickel alloy vertically loaded on the surface of the nickel foam substrate, the molecular formula of the copper-nickel alloy is Cu 0.81 Ni 0.19 , and the copper-nickel alloy is a nanostructure with a dendritic morphology. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, stirring uniformly to obtain an electrolyte; taking the nickel foam substrate as a working electrode, a saturated silver-silver chloride electrode as a reference electrode, a platinum sheet or a graphite rod electrode as a counter electrode, applying a constant current density to the working electrode to obtain a preset electrode; alternately cleaning the preset electrode with ethanol and distilled water, and vacuum drying to obtain the copper-nickel alloy catalytic electrode. The copper-nickel alloy catalytic electrode prepared by the application has a dendritic morphology, rich active sites and a high specific surface area, and has excellent catalytic activity and stability in the hydrogen production by the electro-catalytic coupling hydrogen evolution reaction of cyclohexanone synthesis adipic acid.

The invention relates to the technical field of desulfurization and dearsenification, and discloses a phosphorus chemical front-end desulfurization and dearsenification treatment device, which comprises a reaction tank provided with a pH regulator and a temperature controller, the top of the reaction tank is provided with a cover plate, and the bottom of the cover plate is provided with a conditioner storage tank. Through the structural design that the diameter of a surface push plate is smaller than that of a deep push plate, a guide block is combined to enable a stirring shaft to move up and down during rotation, the deep spraying amount of a conditioner is higher than that of a surface layer, the requirements of high phosphorite particle concentration and more severe reaction caused by gravity of the deep layer of a reaction tank are automatically met, and the complexing effect of deep calcium ions and iron ions is enhanced; meanwhile, by means of sliding fit of the adjusting rod and the cam groove, the spraying amount is automatically increased when the spray head moves from the outer layer to the inner layer, the core area requirements that the inner layer is large in stirring strength and more sufficient in reaction are met, the problems of sediment wrapping or low reaction efficiency caused by insufficient local conditioner are effectively solved, and it is guaranteed that the desulfurization and dearsenification reaction is conducted uniformly and efficiently.