27 results about "Alkali ions" patented technology

The invention belongs to the field of fluorine-containing materials, and relates to a chlor-alkali ion membrane electrolysis test method. The invention aims to provide a test method suitable for scientific research and teaching environments, and accurate control of the chlor-alkali electrolysis process is realized. The method comprises the test steps of pretreatment of the chlor-alkali ionic membrane, assembly of the chlor-alkali ionic membrane, liquid filling of a cathode system and an anode system, heating and electrolysis evaluation. The method has the characteristics of convenience in operation, low energy consumption, high adaptability and the like, and is particularly suitable for research of a chlor-alkali electrolysis process, performance evaluation of a novel membrane material and exploration of an electrochemical reaction mechanism.

The application discloses an alkali ion type covalent organic framework material and a preparation method and application thereof, wherein 2,4,6-tris(4-formylphenyl)-1,3,5-triazine, 1,4-diisocyanobenzene and 2-aminopyridine are used as building units, a covalent organic framework containing pyrimidine is obtained through a condensation reaction, and then a quaternary ammonium reaction and an ion exchange reaction are sequentially performed to obtain the alkali ion type covalent organic framework.The alkali ion type covalent organic framework material prepared by the application has rich alkali sites, developed pore structures and good chemical stability, exhibits good catalytic performance as a catalyst for one-pot preparation of dimethyl carbonate from CO2, an epoxide compound and methanol, and also shows good cycle stability.

To provide a positive electrode active material which can stably maintain an original layered structure without excessively compromising the symmetry of an electronic structure even after a charge and a discharge are repeated, to satisfy the required performance of a secondary battery, the capacity of the positive electrode active material being larger than the effective capacity of lithium cobalt oxide.SOLUTION: A positive electrode active material for an alkaline ion secondary battery is made of ByMO2 when the material is manufactured or is fully charged and is specifically made of an oxide crystal of an alkaline metal B, a transition metal M, and an oxygen atom O as the basic constituent elements of a layered structure (1: movable ions A, 2: an alkaline metal B existing between layers, 3: an octahedron as an oxygen 6-orientation made of the transition metal M and the oxygen O), and the Shannon ions radius is so set that movable ions A is smaller than movable ions B. The existence of B between layers suppresses change in the distance between layers if A is inserted between the layers or is separated from between layers (charge and discharge). The relation A>B in the ion diffusion coefficients makes the layered structure harder to break, and increase of the capacity at a high-rate charge / discharge can be thus attained.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of high polymer materials, and particularly relates to a chlor-alkali ion exchange membrane suitable for an acidic electrolysis environment and a preparation method and application thereof. According to the chlor-alkali ion exchange membrane suitable for the acidic electrolysis environment, firstly, a double-layer membrane matrix of perfluorinated sulfonic acid resin A and perfluorinated sulfonic acid resin B is thermally compounded with a reinforced matrix material to obtain a reinforced composite membrane, and finally, the reinforced composite membrane is subjected to hydrolysis, balancing and hydrogen type transformation treatment to obtain the chlor-alkali ion exchange membrane suitable for the acidic electrolysis environment. The chlor-alkali ion exchange membrane suitable for the acidic electrolysis environment is obtained. The perfluorinated sulfonic acid resin A and the perfluorinated sulfonic acid resin B have different ion exchange capacities, and the mass ratio of the perfluorinated sulfonic acid resin A to the perfluorinated sulfonic acid resin B is (1: 2)-(2: 1). The chlor-alkali ion exchange membrane suitable for the acidic electrolysis environment provided by the invention has good selectivity on chloride ions, can effectively block reverse osmosis of Cl ions, isolates mutual osmosis of hydrogen and oxygen, and stably and efficiently electrolyzes a byproduct hydrochloric acid. The invention also provides a preparation method thereof.

The present invention relates to a method for producing a thick electrode film having a layer thickness of 100 μm or more and 600 μm or less for a secondary alkali ion energy storage device, the method comprising the steps of: a) preparing a dispersion comprising at least one solvent and solids, the dispersion having a total solids content of 40 wt. % or more and 80 wt. % or less, the solids comprising an active material, one or more conductive additives, and one or more binders, and mixing butanediol into the dispersion at a concentration of 2 wt. % or more and 10 wt. % or less, based on the total weight of the dispersion; b) coating the dispersion in a layer thickness of 200 μm or more and 1200 μm or less; and c) drying the coated dispersion to obtain an electrode film. The present invention also relates to the use of the method according to the present invention for producing an electrode film, and to an electrode film having a layer thickness of 100 μm or more and 600 μm or less, and having a specific composition.

The invention belongs to the technical field of polymer functional membranes, and particularly relates to a homogeneous ion exchange membrane prepared from reclaimed materials and a preparation method of the homogeneous ion exchange membrane. The preparation method of the homogeneous ion exchange membrane prepared from the reclaimed materials comprises the following steps: treating the reclaimed materials, then carrying out melt extrusion granulation, measuring the related performance of the reclaimed materials, supplementing resin powder, and then carrying out melt extrusion; and then, carrying out melt casting to prepare a homogeneous mixed acid-based membrane, embedding the reinforced matrix material into the homogeneous mixed acid-based membrane, and finally, soaking to obtain the homogeneous ion exchange membrane. According to the homogeneous ion exchange membrane prepared from the reclaimed materials, the rim charge in the preparation process of a chlor-alkali ion exchange membrane composite membrane is used as a raw material, and the prepared homogeneous ion exchange membrane has good impurity tolerance and impurity blocking capacity, can operate in a complex environment, has good mechanical strength, and can be used for preparing the homogeneous ion exchange membrane. The raw material cost is low; the invention further provides a preparation method, and the preparation process is simple.

The present invention provides a method for producing a positive electrode active material for alkali ion secondary batteries, the positive electrode active material containing a large amount of a transition metal, while enabling a battery to operate.　A method for producing a positive electrode active material for alkali ion secondary batteries, the positive electrode active material containing 34% by mole or more of CrO + FeO + MnO + CoO + NiO. This method for producing a positive electrode active material for alkali ion secondary batteries is characterized by comprising: a step for preparing a positive electrode active material precursor that contains crystals; and a step wherein at least some of the crystals are melted and amorphized by irradiating the positive electrode active material precursor with light.

This invention discloses a method for preparing long-term stable ultra-high purity silica sol. The method involves preparing silica sol using an alkoxide method, followed by forced cyclic desolvation. By adding conjugate acid-base ionic dispersants, the pH and thermal stability of the silica sol are maintained. The prepared silica sol is then modified and subjected to high-pressure aging to ultimately obtain an ultra-high purity silica sol with a mass fraction of over 20%, a primary particle size between 30-150 nm, a secondary particle size between 50-350 nm, and an association degree between 1.7-2.3. The silica sol has a metal ion content of less than 1 ppm, a loss of less than 5% during preparation, and exhibits excellent polishing performance.

Systems and methods for synthesizing solid state polymer electrolytes and / or using solid state polymer electrolytes in the production of all-solid-state alkali-ion batteries are provided.

The present invention relates to reduced graphene oxide (rGO)-based aerogel and methods of preparing such aerogels The invention also relates to electrode materials and electrodes comprising such aerogels and alkali-ion batteries comprising such electrodes.

The utility model discloses a terahertz-enhanced hydro-energetic water generation apparatus comprising a water inlet, a pre-filtration unit, a hydrogen infusion chamber, an alkaline ionization module, and a terahertz resonance chamber arranged in a sequential flow path. The pre-filtration unit removes impurities from raw water. The hydrogen infusion chamber generates hydrogen gas by electrolysis or a magnesium-based reaction and dissolves the hydrogen into the water by a micro-bubble diffusion mechanism to produce hydrogen-rich water. The alkaline ionization module electrolyzes the water to produce alkaline water. The terahertz resonance chamber applies a terahertz-frequency electromagnetic field to condition the water before discharge. The apparatus integrates multiple water treatment functions into a single system to produce hydrogen-rich, alkaline, 15 terahertzconditioned functional water.

This invention provides an anti-efflorescence alkaline primer emulsion for exterior walls, its preparation method, and its application. The raw materials of this primer emulsion, by weight, include: 0.7-1.6 parts emulsifier, 15-27 parts styrene, 10-25 parts acrylate monomers, 0.5-1.8 parts unsaturated carboxylic acids, 0.3-0.8 parts acrylamide monomers, 0.2-0.6 parts silane coupling agent, 0.3-0.5 parts persulfate initiator, 0.05-0.15 parts post-treatment agent, 0.05-0.16 parts environmentally friendly bactericide, 0.5-1.6 parts pH adjuster, 0.03-0.11 parts defoamer, and 41-54 parts water. This invention introduces a silicon-containing or rigid skeleton structure to form a dense cross-linked network, blocking the penetration of salt and alkali ions. This gives the emulsion excellent resistance to salt and alkali, water resistance, and adhesion. It can effectively prevent efflorescence, discoloration, chalking, and peeling of the wall surface, and extend the service life of the topcoat. It is especially suitable for exterior wall coating in high saline and alkaline environments such as coastal areas.

The present application relates to the technical field of high polymer coating, and discloses an anti-adhesion steel formwork coating and a preparation method thereof, the coating is prepared by mixing and curing an A agent and a B agent; the A agent contains, in terms of weight parts, 100 parts of bisphenol A type liquid epoxy resin, 10-15 parts of long-chain aliphatic mono-epoxy active diluent, 5-8 parts of mixed solvent, 0.8-2.0 parts of zinc acetylacetone and 0.05-0.15 parts of copper acetylacetone; and the B agent is 45-64 parts of siloxane modified phenolic amine prepolymer. By covalently anchoring the siloxane chain segment in the crosslinked network, the loss of the anti-adhesion substance is avoided; the coordination steric hindrance effect of zinc ions is used to inhibit the initial reaction heat release, thereby prolonging the pot life; the long-chain aliphatic diluent constructs a hydrophobic shielding layer to block the penetration of strong alkali ions, thereby improving the saponification life; and the dynamic color change mechanism of the copper acetylacetone provides an intuitive indication for material mixing and dry state.

This invention relates to a method for preparing modified fly ash, its products, and their applications. The preparation method includes: sequentially subjecting fly ash to a first grading and screening, magnetic separation, a second grading and screening, and ultrasonic modification to obtain the modified fly ash. The modified fly ash of this invention has a low heavy metal content, reducing pollution. This invention also provides a soil conditioner, which includes the modified fly ash. The mixing of modified fly ash with a saline-alkali soil mortar layer can completely disrupt the dense structure of the mortar layer, increase the soil's permeability and aeration, improve the downward migration channels of saline-alkali ions, and thus accelerate the removal of saline-alkali ions. This method utilizes a large amount of solid waste and achieves the improvement of saline-alkali soil, possessing significant economic and social value.

The invention discloses a high-temperature-resistant and high-concentration alkali-resistant ion solvated microporous membrane and a preparation method and application thereof, and relates to the technical field of separation membranes. Uniformly distributed microporous structures are introduced into a polymer membrane through a controllable super-crosslinking reaction, so that an ion transmission channel is effectively expanded, and the ion flux of the membrane is remarkably improved; meanwhile, stable oxindole / OH <-> complex ion pairs are constructed in situ, and a continuous ion solvation micropore channel is formed; the channel not only provides abundant transmission sites for OH, but also constructs a selective transmission path penetrating through the membrane thickness direction, so that excellent ion selectivity and chemical stability can still be maintained under the conditions of high-concentration alkali liquor and high temperature.

The invention discloses a hydrogen-electricity-heat-steam multi-energy co-production system for chlor-alkali chemical production. The hydrogen-electricity-heat-steam multi-energy co-production system comprises a photovoltaic hydrogen production unit, a chlor-alkali chemical production unit, a power generation waste heat recovery unit, a steam generation unit and an electric power regulation and control unit. Photovoltaic green hydrogen and chlor-alkali byproduct hydrogen are used for cooperatively driving the fuel cell to generate power, and power balance is adjusted; a double-loop heat recovery network is constructed, and low-grade waste heat of a fuel cell, a hydrogen production electrolytic cell, a PVT plate and a chlor-alkali ion membrane electrolytic cell is collected in a unified mode; the waste heat is upgraded into 120-130 DEG C industrial steam by using a direct pressurization boiling type high-temperature heat pump, and the industrial steam is supplied to a chlor-alkali production process to realize gradient utilization of energy and closed-loop circulation of substances.

The invention relates to a water purifying agent as well as a preparation method and application thereof. The water quality purifying agent sequentially comprises a core layer, a functional composite layer coated outside the core layer, and a hydrophobic coating layer coated outside the functional composite layer, the core layer comprises a modified mineral carrier, nano zero-valent iron loaded on the surface of the modified mineral carrier, and chitosan quaternary ammonium salt coated outside the carrier; the functional composite layer comprises a zeolite molecular sieve and a temperature-sensitive polymer; and the hydrophobic coating layer is a siloxane-based coating layer. The weight part ratio of the core layer to the functional composite layer to the hydrophobic coating layer is 100: (15-25): (1-3). Through multi-layer collaborative design of the core layer, the functional composite layer and the hydrophobic coating layer, synchronous and efficient removal of heavy metals, suspended solids and saline-alkali ions in the subsidence water area of the mining area is realized. The preparation process is simple and controllable, the raw materials are environment-friendly, and the method is particularly suitable for large-scale treatment of the mining subsidence area ponding water area and has remarkable economic benefits and environmental benefits.

The present invention relates to a chemically strengthened glass having a thickness of t (unit: μm) and a relative permittivity of 7.0 or less at 20° C. and a frequency of 10 GHz, in which a value of Z determined by the following formula is 0.65 or more, where S1 is an entropy function calculated from an amount of alkali ions in a center portion of the glass, S2 is an entropy function calculated from an average amount of alkali ions from a glass surface to a depth of 0.05t, and X (unit: MPa) is an average value of a compressive stress in a region from the glass surface to the depth of 0.05t: Z=(S2−S1)×10+X / 1000.

The invention relates to salt and alkali flooding resistant reaction type transparent primer. The primer comprises the following raw material components in parts by weight: 30-50 parts of a base material emulsion, 4-10 parts of a multifunctional silane coupling agent, 5-15 parts of a reactive monomer, 2-4 parts of a cross-linking agent, 2-6 parts of a nano reinforcing material, 2-5 parts of an auxiliary agent and 10-55 parts of deionized water, the reaction monomer comprises a phosphate group-containing monomer and a carboxylic acid group-containing monomer. The phosphate group and the carboxylic acid group in the reaction monomer can form stable coordinate bonds and ionic bonds with ions such as Ca < 2 + > and Mg < 2 + > in a base layer; meanwhile, silicon hydroxyl formed by hydrolyzing the multifunctional silane coupling agent can be subjected to condensation reaction with silicon hydroxyl on the surface of the base layer to form a firm Si-O-Si covalent bond. The three chemical bonds are synergistic, a compact chemical bonding anchoring layer can be constructed on an interface, soluble salt and alkali ions are fixed, precipitation of the soluble salt and alkali ions is fundamentally inhibited, and the binding force of the primer and a base layer is remarkably enhanced.

The invention relates to a sulfonamide-based electrolyte additive for an electrochemical cell. Additives are provided for addition to the electrolytes of alkali metal and alkali ion battery cells, the additives decomposing during charging of such cells such that the additives form part of the SEI and CEI layers. The sulfonamide-based compounds can be used as additives for addition to base electrolytes of alkali metal batteries and alkali ion batteries. As electrolyte additives, these compounds promote the formation of inorganic-rich solid electrolyte interfaces and passivate electrode interfaces, resulting in improved cell performance. The solvent of the base electrolyte may include carbonate-based, ether-based, ester-based, sulfone-based, sulfonation-based, nitrile-based, sulfonamide-based, phosphate-based, ionic liquids, and mixtures thereof. The solvents may be non-fluorinated or fluorinated. The weight percentage of the solvent may be from 0.05 wt% to 99 wt%, and preferably from 10 wt% to 90 wt%, relative to the total weight of the electrolyte.

This patent application discloses a red mud solidifying agent and its preparation method. The red mud solidifying agent is prepared from the following raw materials: metakaolin, accounting for 18-22% of the total mass of the solidifying agent; the remaining mass of the solidifying agent after removing the metakaolin, by mass percentage, consists of 5-20 parts fly ash, 1-20 parts slag, and 1-15 parts sodium silicate as an alkaline activator. The red mud solidifying agent synergistically solidifies red mud through multiple processes such as geopolymerization, "volcanic ash reaction," and filling-dispersion reaction. The active silica, alumina, and alkali ions abundant in red mud directly participate in the reaction, forming dense, uniform, and high-strength solidified red mud. Using the red mud solidifying agent to solidify red mud can reduce the consumption of building materials such as cement and lime during highway construction, thereby reducing costs and environmental pollution. In addition, it can promote the resource utilization of red mud and the comprehensive utilization of industrial wastes such as fly ash and slag, possessing both economic and environmental value.

This invention relates to nickel catalysts with alkali ions for homopolymerization and copolymerization.

The invention belongs to the technical field of chlor-alkali industry, and particularly relates to a hydrophilic coating dispersion liquid for a chlor-alkali ionic membrane and a coating preparation method. The coating dispersion liquid comprises the following components in percentage by mass: 10%-30% of a high-boiling-point solvent, 10%-30% of a low-boiling-point solvent, 10%-20% of a perfluorinated sulfonic acid resin solution and 30%-50% of metal oxides, the mass concentration of the perfluorinated sulfonic acid resin solution is 5%-10%, and the metal oxides comprise metal oxides with different particle sizes. The hydrophilic coating prepared from the zirconium powder with different particle sizes has high surface roughness and good hydrophilicity, the cell voltage of the electrolytic cell can be effectively reduced, the current efficiency is improved, and meanwhile, the stability and durability of the coating are enhanced. The coating technology disclosed by the invention has a wide application prospect in the chlor-alkali industry, can effectively reduce energy consumption and improve production efficiency, and has important significance in promoting sustainable development of the chlor-alkali industry.

A method for pickling polyamide, the method comprising step a) contacting the polyamide with an acid pickling solution comprising - a mixture of at least two inorganic acids - MHF2, wherein M is a base ion or an ammonium ion - a monocarboxylic acid having 1 to 5 carbon atoms b) contacting with an organic solvent having 1 to 10 carbon atoms, wherein steps a) and b) are performed sequentially or simultaneously.

The invention discloses a plate with soil isolation and pH value balance functions. The plate comprises an isolation protection layer, a pH value adjusting layer and a permeation buffer layer which are sequentially arranged from outside to inside, the isolation protection layer is made of a modified polypropylene material added with an anti-aging agent and an anti-ultraviolet component, and 0.5 mm micropores are formed between the isolation protection layer and the modified polypropylene material; the acid-base adjusting layer takes porous ceramsite with the porosity of 30%-40% as a carrier to load an acid-base neutralization material; the permeation buffer layer is used for filling a gap between the plate and the soil body and further adsorbing excessive acid and alkali ions in the seepage water through the ion exchange effect to form a secondary buffer barrier; the plates are customized and adjusted according to soil difference and backfilling depth. The method integrates the functions of physical isolation and pH balance, construction is standard, treatment is scientific, the adverse effect of backfill soil on farmland soil can be avoided from the source, and the method is suitable for soil collaborative protection scenes of various housing construction and municipal engineering.

The application provides a preparation method and application of magnesite vegetation concrete and belongs to the field of ecological slope protection. The preparation method comprises the following steps: S1, taking aggregates, light-burned magnesia, magnesium chloride hexahydrate, active admixture, water-resisting agent, alkali ion blocking agent, nutrient matching agent and water according to a certain mass fraction ratio; S2, dissolving the magnesium chloride hexahydrate in water to prepare a MgCl2 solution with a mass fraction of 20wt%-25wt%, and standing for 24 hours; S3, mixing the light-burned magnesia with the MgCl2 solution obtained in S2, stirring for 5 minutes, and then sequentially adding the active admixture, alkali ion blocking agent, water-resisting agent and nutrient matching agent, and continuously stirring until a cementitious slurry is formed; S4, adding the aggregates into the cementitious slurry obtained in S3, and continuously stirring until the surface of the aggregates is covered with uniform cementitious slurry to obtain a slurry to be shaped; and S5, loading the slurry obtained in S4 into a mold, vibrating and compacting to form the magnesite vegetation concrete. The magnesite vegetation concrete prepared by the application has the advantages of low alkali, high water resistance, high strength and good vegetation.

To provide an apparatus capable of producing a cleaning liquid or a cutting liquid containing alkali ion water and an additive.SOLUTION: A cleaning fluid producing apparatus or a cutting fluid producing apparatus comprising a stirring tank, first raw material supply means for supplying water to the stirring tank, second raw material supply means for supplying alkaline ionized water to the stirring tank, third raw material supply means for supplying an additive to the stirring tank, and stirring means for stirring the supplied water, alkaline ionized water, and additive in the stirring tank.SELECTED DRAWING: Figure 1