5 results about "Sodium perborate" patented technology

This invention discloses a method for preparing potassium perborate from sodium perborate mother liquor using modified potassium-form resin, belonging to the field of resource comprehensive utilization technology. The method includes: pretreating a 732 type strong acid cation exchange resin to convert it to the potassium form, then modifying it with a 15-crown ether-5 ethanol solution to obtain a crown ether-modified potassium-form resin; passing the sodium perborate mother liquor through an exchange column packed with this resin, and performing ion exchange at 20-30℃, utilizing the specific selectivity of the crown ether for sodium ions to efficiently replace Na ions in the mother liquor with K ions in the resin, obtaining a pure potassium perborate solution; cooling the solution at -5~5℃ for crystallization, separation, and drying to obtain a high-purity potassium perborate product. This invention directly utilizes waste mother liquor as raw material, with a mild process, and produces a product with high active oxygen content (>16%), uniform particles, and good stability. It solves the problems of high cost, heavy pollution, and poor product quality associated with traditional processes, achieving green and high-value utilization of waste resources.

This invention discloses a modified hard carbon anode material, its preparation method, and its application, belonging to the field of electrode material technology. The preparation method provided by this invention includes the following steps: pre-treating barbecue charcoal material, immersing it in a sodium perborate solution, washing and drying it, then performing an oxidation treatment, followed by carbonization under inert gas, and finally cooling to obtain the final product. The hard carbon anode material prepared by this invention is beneficial for increasing the C=O content in the material, improving the sodium storage specific capacity, and optimizing its rate performance and cycle performance. It is an ideal anode material for sodium-ion batteries. The sodium-ion battery assembled in this application exhibits high initial discharge specific capacity and high initial coulombic efficiency, excellent rate performance, and good stability.

This application belongs to the technical field of passivation and deodorization agents, specifically providing a gas-phase ferrous sulfide deodorizing and passivating agent and its preparation method. A gas-phase ferrous sulfide deodorizing and passivating agent includes component A and component B; component A includes the following components: a multifunctional block copolymer, a penetrant, a corrosion inhibitor, an antioxidant, isopropanol, and deionized water; component B includes the following components: triethanolamine, sodium perborate, and deionized water; the multifunctional block copolymer is prepared by reacting polyethylene glycol monomethyl ether, octadecyl acrylamide, and dopamine methyl acrylamide. The gas-phase ferrous sulfide deodorizing and passivating agent prepared by this application has good deodorizing, passivating, and cleaning effects.

The application belongs to the technical field of passivation deodorant, and specifically provides a gaseous ferrous sulfide deodorizing passivation agent and a preparation method thereof. The gaseous ferrous sulfide deodorizing passivation agent comprises component A and component B; the component A comprises the following components: a multifunctional block copolymer, a penetrating agent, a corrosion inhibitor, an antioxidant, isopropyl alcohol and deionized water; the component B comprises the following components: triethanolamine, sodium perborate and deionized water; and the multifunctional block copolymer is prepared by reaction of polyethylene glycol monomethyl ether, octadecyl acrylamide and dopamine methyl acrylamide. The gaseous ferrous sulfide deodorizing passivation agent prepared by the application has good deodorizing, passivating and cleaning effects.

This invention provides a lead paste for the positive electrode of a lead-acid battery and its preparation method. This invention also provides a rare earth-carbon-based composite lead-acid battery positive electrode additive formulation, comprising, by weight: 25-35 parts of carbon material, wherein the carbon material includes carbon nanotubes, graphene, and expanded graphite, with a mass ratio of carbon nanotubes, graphene, and expanded graphite of 1:2:3; 20-30 parts of binder; 8-12 parts of SnO2-rare earth mixture, wherein the rare earth element includes Ce, with a molar ratio of Ce to Sn of 1:8-10; 30-40 parts of 4BS seed crystals; 50-80 parts of nano-red lead powder; 1-1.5 parts of polyester fiber; and 5-10 parts of sodium perborate. This invention constructs a multidimensional conductive network by combining carbon nanotubes, graphene, expanded graphite, and conductive binder to form a stable three-dimensional network, thus solving the problem of anisotropy in the conductivity of traditional lead paste. It also forms a heterojunction through a mixture of SnO2 and rare earth elements, reducing the oxygen evolution overpotential, refining the grains, and inhibiting the corrosion of the positive electrode grid.