11 results about "Organic complexation" patented technology

This invention discloses a nitrogen-sulfur co-doped multi-chamber carbon-supported copper nanocluster composite material and its preparation method. By integrating polyether F127, 2,6-diaminopyridine, sodium dodecylbenzenesulfonate, fulvic acid, and copper acetate (II), a semi-open and surface-fully embedded copper cluster multi-chamber carbon was successfully constructed. The surface of this multi-chamber carbon is rich in -NH2 and -SO3. ‑ With abundant active groups, it not only boasts a large specific surface area and ample adsorption sites, but also exhibits excellent anti-interference and wide pH adaptability. As an environmentally friendly material, it can simultaneously and efficiently adsorb and remove Cu²⁺ from electroplating wastewater. + Ni² + Pb² + Cd² + It contains heavy metals and organic complexing agents such as ethylenediaminetetraacetic acid (EDTA) and hydroxyethylidene diphosphonic acid (HEDDI). After electroplating wastewater treatment, it achieves convenient solid-liquid separation and recovery through centrifugation and filtration. After acid washing and alcohol washing regeneration, it exhibits excellent cycle stability. With its superior purification efficiency and recycling advantages, it has shown promising development potential in the field of electroplating wastewater treatment.

A multi-barrier coupled treatment process for organic complexed heavy metals in wastewater from battery cathode material production is disclosed, relating to the field of wastewater treatment. The method involves: 1. Adjusting the pH of the wastewater to 3.0-4.5; 2. Adding iron salt and peracetic acid to an oxidation reaction tank; 3. Achieving primary removal of heavy metals through neutralization and precipitation after oxidation; 4. Adjusting the pH of the wastewater back to 6.0-6.5; 5. Passing the wastewater sequentially through a primary adsorption unit and a secondary adsorption unit. This invention utilizes the low bond energy characteristics of PAA and the synergistic oxidation advantages of multiple free radicals to solve the bottleneck problems of incomplete complex breaking, large sludge production, and narrow pH application range in traditional methods. After treatment by this invention, the total nickel concentration in the effluent is less than 0.05 mg / L, and the total cobalt concentration is less than 0.02 mg / L, consistently exceeding the limits of the "Emission Standard of Pollutants for Battery Industry" (GB 30484-2013), demonstrating broad industrial application prospects.

This invention relates to a monodisperse spherical micro / nano silica, its preparation method, and its applications. First, an aqueous sodium silicate solution is added to a crown ether aqueous solution, followed by the dropwise addition of sulfuric acid solution and stirring to initiate the reaction. Then, an organic extractant is added to extract the aqueous and organic phases. The aqueous phase is then mixed with an aqueous sulfuric acid solution and an alcohol solvent, respectively, to obtain two different solutions. These two solutions are then mixed and stirred, followed by centrifugation, washing, and drying to obtain the target product. The organic phase is subjected to vacuum distillation, water dissolution, and adsorption with an ion exchange resin to obtain a regenerated crown ether aqueous solution, which is then recycled. This invention adjusts the ionic strength of the reaction system by adding an organic complexing agent, precisely controlling the particle size of SiO2 particles to 20-1300 nm. This results in particles with uniform size, high sphericity, and good dispersibility. The entire preparation process has advantages such as simple technology, low cost, high yield, and ease of large-scale industrial production, showing promising application prospects in aerospace, biomedicine, and electronic packaging fields.

The application provides a mechanochemical auxiliary residual base activated positive electrode material of a sodium ion battery, characterized by the following structure: wherein: and are oxygen vacancies; B elements are doped in the bulk lattice; and Cl elements are distributed on the material surface; and a synergistic effect exists between the B-doped structure and the surface Cl-containing layer. The application uses residual base as an in-situ reaction inducer, realizes the chlorine-containing modification of the material surface through mechanochemical auxiliary activation and low-temperature gas phase induction, and forms the synergistic effect of the boron-doped main body and the surface chlorine-containing layer, so that the process steps are few, the raw material cost is low, and no organic complexing agent or complex coating equipment is needed.

This invention belongs to the field of soil conditioner technology, and relates to an organic-inorganic coupled conditioner for improving soda saline-alkali land and its preparation method. The inorganic particles are composed of a mixture of activated polyaluminum ferric sulfate, activated zeolite powder, transcrystalline gypsum, trace elements, and reinforcing agents. The organic slurry is homogenized from activated humic acid extract, modified lignin sulfonate, functional biochar complex, and polyglutamic acid concentrate, and then subjected to spray granulation and high-temperature, high-humidity aging to achieve chemical cross-linking at the organic-inorganic interface, forming a stable three-dimensional network structure. The resulting conditioner integrates chemical exchange, physical adsorption, organic complexation, and biostimulation, and can rapidly reduce soil pH and alkalinity, improve soil aggregate structure, enhance nutrient retention capacity, and has a long-lasting effect and is environmentally friendly, making it suitable for the comprehensive management of soda saline-alkali land.

This invention discloses a graded purification method for wet-process phosphoric acid, relating to the field of phosphoric acid chemical industry. The method includes the following steps: S100, adding an inorganic precipitant to wet-process phosphoric acid to carry out a main precipitation reaction; S200, adding active seed crystals to the material obtained in step S100 to carry out a seed-induced interface activation reaction; S300, adding an organic complexing agent to the material obtained in step S200 to carry out a complexation reaction; S400, adding a flocculant to the material obtained in step S300, and obtaining purified phosphoric acid through solid-liquid separation; wherein the inorganic precipitant is a diatomaceous earth-based composite precipitant modified with phytic acid and ionic liquid; and the organic complexing agent is a mixture of dithiophosphate compounds and hydroxyquinoline compounds. This invention achieves a removal rate of over 85% for major impurities such as iron, aluminum, and magnesium, and a removal rate of over 95% for trace heavy metals such as arsenic, cadmium, and lead, with a phosphorus yield of over 96.5%, by constructing a four-stage synergistic system of main precipitation-seed activation-deep complexation-flocculation enhancement.

This invention provides a method for preparing nitrogen-modified lead-carbon composite materials from waste lead paste and its application. The method includes the following steps: reducing waste lead paste to obtain reduced lead paste; reacting the reduced lead paste in a desulfurizing agent to obtain desulfurized lead paste; reacting the desulfurized lead paste in a nitrogen-containing organic leaching agent solution to obtain a lead-containing organic complex solution; and then evaporating, crystallizing, and pyrolyzing to obtain the nitrogen-modified lead-carbon composite material. This invention achieves efficient lead leaching and simultaneous nitrogen introduction through a nitrogen-containing organic leaching agent, followed by evaporation, crystallization, and controlled pyrolysis to construct a lead-carbon-nitrogen composite structure in situ. The resulting nitrogen-modified lead-carbon composite material possesses high conductivity and excellent hydrogen evolution inhibition capability, making it suitable for high-performance lead-carbon battery anodes. It effectively solves the problems of lengthy processes, large reagent inputs, and hydrogen evolution in lead-carbon batteries associated with existing technologies.

The invention discloses a method and a system for directionally removing non-volatile acid radicals and recovering urea in high-concentration urea wastewater, and belongs to the technical field of wastewater treatment and resource recovery. The method comprises the following steps: firstly, introducing wastewater into a pretreatment unit, adding a synergistic treatment agent compounded by alkali metal salt, an organic complexing agent and nano catalytic particles, and directionally precipitating non-volatile acid radicals to form a compact precipitate; intensified solid-liquid separation is completed through an ultrasonic-assisted horizontal spiral discharging sedimentation centrifuge, residual acid radicals in supernate are deeply adsorbed through graphene quantum dot-temperature responsive magnetic nanoparticle composite modified anion exchange resin, and the acid radicals are almost completely removed; then, urea is concentrated by adopting a low-temperature evaporation-waste heat recovery coupling process, and high-purity urea crystals are separated out through segmented temperature-pressure gradient crystallization; the resin saturated by adsorption is separated and recovered through a magnetic field, and is recycled after temperature regulation and mild regeneration; the method is suitable for resourceful treatment of industrial high-concentration urea wastewater.

The application belongs to the field of catalytic materials, and specifically discloses a preparation method of a nano high-entropy alloy material and application of the material in oxygen electrocatalysis. The preparation method is as follows: a multi-metal organic complex, a reactive metal and a molten salt are mixed and calcined, and then subjected to simple water washing treatment and alkali washing modification treatment to obtain the nano high-entropy alloy material; the multi-metal organic complex is a complex formed by a metal M source and an organic complexing agent, and the metal M contains five or more than five kinds of Fe, Co, Ni, Cr, Mn, Cu, V, Mo, Ti, Au, Ag, Pt, Pd, Ru, Ir and Rh. The application also includes the material prepared by the preparation method and application of the material in OER / ORR catalysis. The material prepared by the method has excellent OER / ORR catalytic activity and stability.

The present application relates to the technical field of fertilizer composition and its preparation, and discloses a preparation process of magnesium modified biochar reinforced tomato straw bio-organic fertilizer, which comprises the following steps: generating a solid phase carbon base carrier by limiting oxygen pyrolysis of lignocellulose based biomass material, and quickly quenching the carrier in a magnesium salt solution in a hot state, so that magnesium ions are driven into microporous deep parts by using thermodynamic pressure difference; and mixing the obtained modified carrier with an organic fermentation substrate, so as to induce magnesium ions and humic acid to be crosslinked and coordinated at a contact interface, and to self-assemble and construct a mineral-organic complex interface layer with proton response characteristics. The present application adjusts nutrient osmotic pressure by using reversible phase transition of the gel and sol state of the interface layer under the driving of proton concentration, realizes deep anchoring of mineral elements in the carbon base skeleton, effectively solves the problem of poor adhesion of nutrients, and realizes dynamic matching of the nutrient release rate and the physiological demand of crops.

The present application belongs to the technical field of soil remediation, and particularly relates to a composite conditioning module for remediation of heavy metal pollution in acid soil and a time-sequential precise remediation method for heavy metal pollution in acid soil. The present application carries out time-sequential precise remediation of heavy metal pollution in acid soil based on the composite conditioning module, which specifically reflects that a first module composition is applied to carry out physical and chemical passivation, to preliminarily stabilize heavy metals and adjust pH; after 7-10 days, a second module composition is applied to carry out organic complexing and structure modification, to further passivate and improve soil physical structure; after 3-5 days, microbial inoculants are inoculated, to enable strains to quickly colonize and proliferate in the good environment created in the previous step; and finally, hyperaccumulation plants are planted to extract and remove. The remediation method solves the antagonism problem in multi-component remediation and realizes synergistic effect through precise time-sequential control.