71 results about "Alkali ions" patented technology

The invention provides a modified alkaline electrolytic water hydrogen production diaphragm and a preparation method thereof. The modified diaphragm comprises a base membrane loaded with a Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit, and the Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit is obtained by loading chitosan through the base membrane and soaking in a Cu < 2 + > complexed solution for complexing. By introducing a copper-chitosan complex structure, a stable ionic conduction channel is constructed in an alkaline environment, and the alkali resistance and ionic conductivity of the membrane are effectively improved. According to the modified alkaline diaphragm for hydrogen production by electrolysis of water, the problems of insufficient alkali resistance, limited ion transmission capability and the like of a diaphragm material in the prior art are solved, and a new solution is provided for preparing the diaphragm for hydrogen production by electrolysis of alkaline water with long service life, high efficiency and low cost.

The invention relates to the technical field of building materials, in particular to a method for rapidly measuring the content of effective alkali in a mineral admixture for concrete. Comprising the following steps: S1, preparing a mineral admixture sample, grinding, screening, sealing and storing, drying the sample to constant weight before analysis, and cooling to room temperature for later use; s2, preparing a slurry from the to-be-tested sample, reference cement and water according to a mass ratio of 5: 2: 10, maintaining for 28 days, grinding, diluting and filtering to obtain a leaching solution; s3, determining the effective concentration of alkali ions of potassium and sodium in the leaching solution by an ion selective electrode method; and S4, converting the measured alkali ion effective concentration result into the effective alkali content in the admixture, and finally expressing the effective alkali content as Na2O equivalent (%). By detecting the content of the effective alkali, a basis is provided for the doping amount limiting value of the admixture in engineering application, it is ensured that concrete is prepared under the condition that the doping amount of the admixture is safe, and the risks of cracking, expansion and the like of the concrete are reduced.

The utility model discloses a chlor-alkali ionic membrane salt water stepped acid adding system which comprises a fresh salt water tank, a first water outlet pipe connected with the fresh salt water tank, a light salt water tank, a second water outlet pipe connected with the light salt water tank, and a mixing pipe converging the first water outlet pipe and the second water outlet pipe, the acid adding system further comprises a diluted hydrochloric acid tank, a first connecting pipe connected with the diluted hydrochloric acid tank and the mixing pipe, and a second connecting pipe connected with the diluted hydrochloric acid tank and a water inlet of the electrolytic bath, so that a mixed solution formed by mixing refined salt water in the fresh salt water tank and light salt water in the light salt water tank is subjected to secondary acid adding. Compared with the prior art, the chlor-alkali ionic membrane salt water stepped acid adding system disclosed by the utility model has the advantages that the PH value can be more favorably controlled, the PH value control accuracy is improved, and on the other hand, the workload of manually adjusting the flow of diluted hydrochloric acid can also be reduced.

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.

This invention relates to nickel catalysts with alkali ions for homopolymerization and copolymerization. This invention also relates to methods of preparing copolymers and to methods of degrading copolymers.

The invention belongs to the technical field of refractory materials, and discloses a method for preparing a refractory raw material by utilizing harmless treatment of secondary aluminum ash, which comprises the following steps: selecting hazardous solid waste secondary aluminum ash rich in potassium, sodium, fluorine, chlorine and other harmful substances as a treatment object, grinding, sieving, mixing with sulfite paper pulp waste liquid, and pressing into a porous honeycomb aluminum ash standard brick. Preparing a refractory raw material through the processes of normal-temperature maintenance, heat treatment in a high-temperature nitrogen environment and the like; the technological process is simple, and during high-temperature heat treatment, fluorine, chlorine, potassium, sodium and other alkali ions contained in the aluminum ash are volatilized under the high-temperature driving effect; under the protection of nitrogen atmosphere, the binding capacity between alkali ions such as potassium and sodium and silicon oxide and aluminum oxide in the aluminum ash during volatilization is reduced, and the alkali ions are promoted to effectively escape, so that the alkali removal effect is achieved, and a harmless refractory raw material is obtained; the method is low in production cost, high in aluminum ash treatment efficiency, high in dealkalization rate and good in effect, secondary pollution caused in the aluminum ash treatment process is avoided, and the resource utilization level is improved.

A self-supported porous 3D flexible host anode for lithium metal secondary batteries having a primary coating >5 atomic wt % and in addition to <5 atomic wt % of at least two additional lithiophilic elements, leading to synergistic plating and stripping effect of the alkali ions, wherein all the coating elements have the capability of forming intermetallic alloys with lithium and / or between themselves within the potential window range of 1.5 V and −0.5 V Vs Li / Li+, having a porosity of at least 70%, and a thickness between 10 μm and 100 μm, comprising a non-woven, woven or ordered arrangement of constituent fibres with a diameter ranging between 200 nm and 40 μm.

A process for the recovery of carbon dioxide (CO2) from a carbon dioxide-containing gas, in particular air and / or exhaust gas, comprises the steps: a) contacting the carbon dioxide-containing gas with an absorbent in the form of a solution of aqueous alkali metal hydroxide solution, in particular sodium hydroxide solution and / or potassium hydroxide solution, so that carbon dioxide is absorbed from the carbon dioxide-containing gas and alkali metal carbonate, in particular sodium carbonate (Na2CO3) and / or potassium carbonate (K2CO3), is formed in the absorbent; b) carrying out an ion exchange step, wherein the alkali carbonate formed in step a) is subjected in dissolved form to a cation exchange process so that the alkali ions of the alkali carbonate are bound to a cation exchanger; c) eluting the alkali ions bound to the cation exchanger in step b) with a solution containing ammonia and / or at least one amine, whereby alkali metal hydroxide solution is recovered, which is preferably used for the renewed absorption of carbon dioxide in step a)

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

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.

The present invention concerns the recovery of methionylmethionine from aqueous alkali ions containing media by intermediate formation of Bis(methionyl)-diketopiperazine.

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 invention relates to chemically strengthened glass and an electronic device case. The purpose of the present invention is to provide a chemically strengthened glass having both excellent radio wave transmissivity in a high-frequency band and high strength. The present invention relates to a chemically strengthened glass having a thickness of t (in [mu] m) and a relative dielectric constant of 7.0 or less at 20 DEG C and a frequency of 10 GHz (Z = (S2-S1) * 10 + X / 1000), where Z, as determined by the following equation, is 0.65 or more. In the formula, S1 is an entropy function calculated from the amount of alkali ions in the center of the glass, S2 is an entropy function calculated from the average amount of alkali ions in a region from the surface of the glass to a depth of 0.05 t, and X is the average value (unit: MPa) of compressive stress in a region from the surface of the glass to a depth of 0.05 t.

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 present invention relates to a process for producing an electrode for an alkaline ion ac-cumulator, wherein the process comprises at least the process steps:a) Providing an electrode layer pre-loaded with alkali ions andb) currentless contacting of the pre-loaded electrode layer provided in process step a) with a solution comprising an organic solvent and at least one additive dissolved therein, the addi-tive being selected from the group consisting of carbon dioxide, organic carbonates, organic silanes, derivatives thereof or mixtures of at least two additives from this group, and cur-rentless deposition of at least part of the additive onto the pre-loaded electrode layer in the absence of an electrolyte salt. Furthermore, the present invention relates to pre-loaded elec-trodes produced by the process according to the invention and to the use of the process for producing electrodes for alkaline ion accumulators.

The invention belongs to the technical field of adsorption photocatalysis, and particularly relates to an attapulgite double-effect catalyst and a preparation method and application thereof in degradation of VOCs (volatile organic compounds), the preparation method comprises the following steps: S1, respectively fully dissolving attapulgite original soil and a dispersing agent in water, standing, and centrifugally separating to obtain a suspension; and S2, adding an ion exchange solution into the suspension, mixing and reacting, and sequentially stirring, centrifuging, drying, grinding and sieving to obtain the attapulgite double-effect catalyst. The attapulgite double-effect catalyst is formed by carrying out acid or alkali ion exchange treatment on the original attapulgite, the preparation cost is low, and the attapulgite double-effect catalyst has a large specific surface area, a rich pore structure and excellent adsorption performance, and realizes double-effect degradation of VOCs (Volatile Organic Compounds).

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 discloses a method for continuous treatment of TDI waste brine, which belongs to the technical field of wastewater treatment. The method of the present invention comprises the following steps: adjusting the pH value of the TDI waste brine to acidic, then subjecting the acidic waste brine to a peroxidation adsorption column and simultaneously subjecting it to ultraviolet irradiation to perform photocatalytic oxidation and adsorption reaction; after the reaction is completed, adjusting the pH value of the acidic waste brine to alkaline, then passing the alkaline waste brine through a stripping tower to remove small molecule organic matter, and obtaining waste brine after continuous treatment. The continuous treatment method of the present invention can completely remove organic matter from the TDI waste brine, and the treated waste brine has a TOC of less than 10 ppm and a TN of less than 3 ppm, and can be used as a raw material for the chlor-alkali ion membrane preparation process of caustic soda, so that the sodium chloride and water in the waste brine are recycled, achieving zero discharge of the waste brine and solving the problem of environmental pollution. In addition, the treatment method of the present invention is simple, easy to operate, and cost-effective.

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.

The present invention relates to the use of a storage stabilization agent for stabilizing an aqueous home care formulation upon storage, wherein the storage stabilization agent comprises at least two different water soluble or water dispersible ion sources selected from the group consisting of water soluble or water dispersible source of bismuth ions, water soluble or water dispersible source of lithium ions, water soluble or water dispersible source of magnesium ions and at least a water soluble or water dispersible source of alkali ions, wherein the water soluble or water dispersible source of alkali ions is selected from alkali carbonate and / or alkali bicarbonate and wherein the water dispersible source of magnesium ions is selected from magnesium carbonate or magnesite (MgCO3) and / or hydromagnesite (Mg5(CO3)4(OH)2·4H2O).

The application discloses an alkali ion passivated non-lead perovskite light-emitting diode and a preparation method thereof, and belongs to the technical field of light-emitting diodes.The light-emitting diode comprises, from bottom to top, ITO conductive glass, a hole injection layer, a hole transport layer, a non-lead perovskite light-emitting layer, an electron transport layer, an electrode modification layer and a metal electrode.The application further provides a preparation method of the non-lead perovskite light-emitting diode.The non-lead perovskite light-emitting layer is prepared by an anti-solvent crystallization method from an alkali ion passivated non-lead perovskite precursor solution and an anti-solvent, and the alkali ion is introduced to inhibit non-radiative recombination loss in a surface and a grain boundary of the non-lead perovskite thin film, so that the light-emitting efficiency is enhanced, and the photoelectric performance of the non-lead perovskite light-emitting diode device is improved.

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 invention discloses an alkali ion type covalent organic framework material as well as a preparation method and application thereof.The alkali ion type covalent organic framework material is prepared by taking 2, 4, 6-tri (4-formyl phenyl)-1, 3, 5-triazine, 1, 4-diisocyanobenzene and 2-aminopyridine as construction units, obtaining a pyrimidine-containing covalent organic framework through condensation reaction, and then sequentially carrying out quaternization reaction and ion exchange reaction to obtain the alkali ion type covalent organic framework material. The alkaline ionic covalent organic framework is obtained. The alkali ion type covalent organic framework material prepared by the invention has abundant alkaline sites, a developed pore structure and good chemical stability, shows good catalytic performance when being used as a catalyst for preparing dimethyl carbonate from CO2, an epoxy compound and methanol in a one-pot manner, and shows good cycle stability.

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.

To provide a solution that makes manufacture and implementation easy and economical for providing a host lithium metal anode for use in secondary batteries.SOLUTION: A self-supported porous 3D flexible host anode for lithium metal secondary batteries has more than 5 atomic wt.% of a primary coating and additionally less than 5 atomic wt.% of at least two additional lithiophilic elements, leading to synergistic plating and stripping effect of alkali ions, where all the coating elements have the capability of forming intermetallic alloys with lithium and / or between the coating elements within the potential window range between 1.5 V and -0.5 V vs Li / Li+. The anode has a porosity of at least 70% and a thickness between 10 μm and 100 μm, and comprises a non-woven, woven or ordered arrangement of constituent fibers with a diameter ranging between 200 nm and 40 μm.SELECTED DRAWING: Figure 1

A multi-fiber light guide includes: light guiding fibers, each fiber including an elongated glass core; a glass cladding, the cores being surrounded by the cladding to form a rigid and continuous glass element, the cores having a higher refractive index than the cladding such that light can be guided by a total reflection along the cores, which end in two abutting faces of the glass element such that light can be guided along the cores from one abutting face to the other abutting face; and an ion exchange layer at each of the abutting faces, the glass of the cores and the glass of the cladding including alkali ions, which are at least partly exchanged by alkali ions of a higher atomic number within the ion exchange layer at the abutting faces, the exchanged alkali ions within the ion exchange layer imparting a compressive stress at the abutting faces.

The present invention discloses a method for improving the mechanical and biological activity of lithium disilicate glass ceramics by composite ion exchange, which comprises: first, removing crystallization water from Ca(NO3)2·4H2O to obtain Ca(NO3)2; second, placing KNO3 in Ca(NO3)2 and heating and keeping the mixture warm until it is completely melted to obtain a KNO3-Ca(NO3)2 mixed bath salt; third, maintaining the KNO3-Ca(NO3)2 mixed bath salt at a constant temperature, and placing the mixture into lithium disilicate glass ceramics for ion exchange treatment; fourth, taking it out, cooling it to room temperature, and washing the residual molten salt on the surface. The present invention uses Li + / Ca 2+ 、Li + / K + Composite ion exchange regulates the stress state and ion distribution of the surface of lithium disilicate glass ceramics, and constructs a residual compressive stress layer and a gradient Ca-rich layer on its surface. 2+ , K + The bioactive alkali ion layer improves the mechanical properties and bioactivity of lithium disilicate glass ceramics and is suitable for medical implants.