93 results about "Sulphate Ion" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

A biomolecule analysis method of the present disclosure includes: preparing a biomolecule analysis device including a thin film, a first liquid tank and a second liquid tank separated by the thin film, a first electrode disposed in the first liquid tank, and a second electrode disposed in the second liquid tank; and forming a nanopore in the thin film by applying a first voltage between the first electrode and the second electrode in a state where a nanopore forming solution is enclosed in the first liquid tank and the second liquid tank, wherein the nanopore forming solution contains ammonium ions and sulfate ions.

A method for preparing 1,2-propanediol involves continuously reacting propene with hydrogen peroxide in the presence of a catalyst mixture, containing a quaternary ammonium salt and a polytungstophosphate, in a liquid reaction mixture containing an aqueous phase with a maximum apparent pH of 6 and an organic phase containing an alkylaromatic hydrocarbon solvent. The method then involves withdrawing the liquid reaction mixture from the reaction and adding a water-soluble sulfate salt or sulfuric acid to provide a mixture containing from 500 to 10,000 mg / kg of sulfate ions in the aqueous phase. The method further involves separating the mixture obtained into an aqueous phase (Pa) containing 1,2-propanediol and an organic phase (Po), recycling at least a part of the organic phase (Po) to the reaction, and recovering 1,2-propanediol from the aqueous phase (Pa). The method allows for extended operation of the reaction with little loss of tungsten and phase transfer catalyst.

The application provides a process and equipment for removing m-methylaniline and indole in coking nanofiltration concentrated water, a catalyst and a preparation method thereof, and the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 45-78 mu g / L, and indole 23-39 mu g / L; the process comprises the following treatment steps: the coking nanofiltration concentrated water enters the ozone catalytic tower from the bottom of the tower and flows out from bottom to top, and the ozone catalytic tower is internally provided with a modified peanut shell biochar catalyst; after the ozone catalytic reaction, the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 3-7 mu g / L, and indole 1-6 mu g / L.

The invention relates to a method and a system for producing an oxidant solution, comprising an electrochemical cell having an anode and a cathode, the method comprising the steps of: (i) supplying a raw electrolyte to a reaction region between the anode and the cathode, the raw electrolyte consisting of sulfate ions (SO42-) and ferrous ions (Fe2 +); (ii) during a run cycle, electrolyzing the feedstock electrolyte to produce an oxidized acid solution comprising peroxydisulfate (S2O8 < 2->) and iron ions (Fe < 3 + >); and (iii) supplying the oxidized acid solution. The oxidant solution is preferably used to leach metals from wastes including electronic wastes and metal-containing ores.

To provide a method for producing coated particles that, when used as a positive electrode active material for non-aqueous electrolyte secondary batteries, including lithium-ion secondary batteries, result in non-aqueous electrolyte secondary batteries exhibiting excellent charge / discharge capacity, electrical resistance, and cycle characteristics. [Solution] The manufacturing method according to the present disclosure comprises an addition step of adding a boron-containing additive compound to a lithium metal composite oxide to obtain a mixture, and a heat treatment step of applying heat treatment to the mixture to obtain coated particles, wherein in the heat treatment step, the sulfate ion concentration in the mixture before heat treatment is 1200 ppm or more and 5000 ppm or less, and the amount of sulfate ions relative to the amount of boron (SO4 / B) is 0.1 (mol / mol) or more and 1.0 (mol / mol) or less.

The invention relates to the technical field of solar cells, in particular to a perovskite solar cell based on 2-aminoethyl sulfuric acid interface modification and a preparation method thereof, and the perovskite solar cell sequentially comprises a conductive substrate layer, an electron transport layer, a perovskite light absorption layer, a hole transport layer and a back electrode layer from bottom to top; an interface between the electron transport layer and the perovskite light absorption layer is modified through amphoteric molecules, the amphoteric molecules are 2-aminoethyl sulfuric acid, and the molecular formula of the amphoteric molecules is C2H7NO4S. Wherein sulfate ions in the amphoteric molecules can passivate oxygen vacancy defects in a manner of forming covalent bonds with the oxygen vacancy defects on the surface of the metal oxide, and ammonium ions in the amphoteric molecules can passivate organic acupoints of the perovskite in a manner of forming ionic bonds with PbI3 <-> in the perovskite; meanwhile, the interface energy level of the electron transport layer / perovskite light absorption layer and the quality of the perovskite thin film are improved, and finally the purpose of improving the efficiency and the stability of the perovskite solar cell is achieved.

The invention provides a solvent-free organic-inorganic hybrid resin composition. The solvent-free organic-inorganic hybrid resin composition can provide a member having a high elastic modulus. The solvent-free organic-inorganic hybrid resin composition comprises the following components (A)-(C), and a resin film having self-supporting properties can be obtained after firing at 230 DEG C or lower. (A) silica particles having an average primary particle diameter of 15-100 nm and a sulfate ion content of 30 ppm or less, as calculated by formula 1 below, adhering to the silica particles; particle-attached sulfate ions (ppm) = combustion ion chromatography (ppm)-free ion chromatography (ppm) (formula 1); (B) an epoxy resin having two or more epoxy groups and having a number average molecular weight of 150-3000 (inclusive); and (C) a curing agent.

The invention provides a flow battery containing a thiosulfate and potassium sulfide mixed electrolyte, a negative electrode electrolyte is a mixed solution formed by dissolving thiosulfate and potassium sulfide in a supporting electrolyte solution, the concentration of thiosulfate ions (S2O3 < 2->) is 0.1-2 mol / L, and the molar ratio of potassium sulfide (K2S) to potassium thiosulfate (K2S2O3) ranges from 1: 0.2 to 1: 2; and the supporting electrolyte is an alkaline or neutral electrolyte solution with the concentration of 1-3 mol / L. By introducing thiosulfate radical (S2O3 < 2->), the thiosulfate radical and elemental sulfur form a soluble polythiosulfate complex in a negative electrode electrolyte, solid sulfur deposition is effectively inhibited, and the problems of electrode pore blockage, flow channel blockage, active substance loss and the like caused by solid sulfur deposition in an existing polysulfide or sulfide system flow battery are solved.

An object of the present invention is to provide a pharmaceutical formulation obtained by combining a liposome composition, in which liposomes encapsulate a drug, with a platinum preparation. According to the present invention, there is provided a pharmaceutical formulation including (A) a liposome composition in combination with (B) a platinum preparation, in which the liposome composition includes, as constitutional components of a liposome membrane, a hydrophilic polymer-modified diacylphosphatidylethanolamine; a dihydrosphingomyelin; and cholesterols, the liposome composition includes a drug and has an inner water phase containing ammonium sulfate, a molar ratio of sulfate ions in the inner water phase to the drug in an entire water phase is 0.36 or more, and the liposome composition and the platinum preparation are administered simultaneously or sequentially.

The application discloses a kind of carbon quantum dot materials and its preparation method and application, specifically related to the field of battery material.It includes: p-xylylene formaldehyde and p-trifluoromethyl phenyl cyanide acetonitrile are placed in sodium methoxide solution to carry out hydrothermal reaction, obtain carbon quantum dot material;PAN powder is mixed with DMF to obtain PAN spinning solution;Carbon quantum dot material is dispersed in PAN spinning solution, to obtain mixed spinning liquid;Mixed spinning liquid is spun on the surface of zinc foil by electrostatic spinning, to obtain modified zinc foil.Carbon quantum dot material rich in multiple types of zincophilic functional groups synthesized by hydrothermal method strategy can improve the electric field distribution of zinc metal surface, and then uniform zinc ion deposition and nucleation process, avoid zinc dendrite formation, use modified zinc foil as the anode material of aqueous zinc ion battery, and carbon quantum dot material with abundant negative electric functional groups can repel sulfate ions in electrolyte, to inhibit the formation of byproduct.

A coating liquid includes emulsion particles containing a binder resin, aerogel particles, and a liquid medium, wherein a content of chloride ions is 50 ppm by mass or less, and a content of sulfate ions is 50 ppm by mass or less.

An object of the present invention is to provide a pharmaceutical formulation obtained by combining a liposome composition in which liposomes encapsulate a drug with an immune checkpoint inhibitor. According to the present invention, there is provided a pharmaceutical formulation including (A) a liposome composition in combination with (B) an immune checkpoint inhibitor, in which the liposome composition includes, as constitutional components of a liposome membrane, a hydrophilic polymer-modified diacylphosphatidylethanolamine; a dihydrosphingomyelin, and cholesterols, the liposome composition includes a drug and has art inner water phase containing ammonium sulfate, a molar ratio of sulfate ions in the inner water phase to the drug in an entire water phase is 0.36 or more, and the liposome composition and the immune checkpoint inhibitor are administered simultaneously or sequentially.

The present invention relates to a method and system for producing an oxidant solution, comprising an electrochemical cell having an anode and a cathode. The method includes the steps of: (i) supplying a feed electrolyte to a reaction zone between the anode and the cathode, wherein the feed electrolyte contains sulfate ions (SO4 2- ) and divalent iron ions (Fe 2+ ) and (ii) in the operation cycle, the raw electrolyte is electrolyzed to produce peroxodisulfate (SO) 2- ) and trivalent iron ions (Fe 3+ and (iii) providing the oxidizing acid solution. The oxidizer solution is preferably used to leach metals from waste materials, including e-waste, and metal-bearing ores.

The invention discloses a stable electrolyte for a vanadium redox flow battery as well as a preparation method and application of the stable electrolyte. The stable electrolyte for the vanadium redox flow battery comprises vanadium ions, sulfate ions, an additive and a solvent, wherein the additive is prepared from (2-carboxyethyl) polyethylene glycol and 2-fluoro-5-methoxybenzyl alcohol. The preparation method comprises the following steps: adding the additive into a reaction kettle; according to the invention, (2-carboxyethyl) polyethylene glycol and 2-fluoro-5-methoxybenzyl alcohol are compounded for use, and meanwhile, the concentration is controlled, so that the prepared electrolyte has relatively high stability, and the electrochemical performance of the battery can be effectively improved.

Provided are: a gold plating method for achieving soft gold plating; a composition for gold plating; and a plating solution. The gold plating method is performed using a plating solution comprising: a gold sulfite salt; and at least one among thiosulfate ions and trithionic acid ions.

This invention belongs to the field of waste acid treatment technology, specifically disclosing a zeolite-like molecular sieve membrane for removing fluoride and chlorine from waste acid and its preparation method. The molecular sieve membrane comprises a dispersed phase and a continuous phase. The dispersed phase is zeolite-like molecular sieve nanoparticles, and the continuous phase is formed by dissolving PVDF monomer particles. The zeolite-like molecular sieve nanoparticles are prepared by dissolving a metal compound in a first solvent under ultrasonic conditions, then dissolving it in a second solvent to form a mixed solution I, followed by drying. The preparation method includes a blending method to prepare a PVDF molecular sieve blend membrane, and a surface coating modification step for the PVDF molecular sieve blend membrane. This invention prepares a zeolite-like molecular sieve membrane for waste acid systems through a blending method, allowing fluoride and chlorine ions to permeate while retaining sulfate ions, thereby removing fluoride and chlorine and reducing the loss rate of sulfate ions, achieving the recycling of sulfuric acid resources. It features high fluoride and chlorine removal rate, high sulfate retention rate, good corrosion resistance, and high water flux.

The present invention discloses a graded extraction method for barium toxic substances and its application, which belongs to the field of chemical detection technology. The present invention utilizes a graded extraction method to extract and separate acid-soluble barium in rock cuttings samples, thereby avoiding this part of barium from combining with other substances in the subsequent detection process and reducing the accuracy of the detection; utilizing a composite carbon thermal reduction technology, the barium sulfate in the rock cuttings is reduced and converted into barium chloride detectable by ICP-OES, while the sulfate ions are reduced to soluble sulfides, and no oxidizing agents such as nitric acid are used in the subsequent extraction method, thereby avoiding the sulfide being further oxidized to sulfate ions and reducing the detection accuracy of barium. The graded extraction method of the present invention can separate barium salts of different toxicities in the sample, and realize quantitative analysis and detection of barium toxic substances of different toxicities in the sample.

Disclosed is a wastewater treatment method capable of selectively separating and highly purifying a low-molecular-weight valuable substance. The present invention is a wastewater treatment method including a step of separating a wastewater containing a low-molecular-weight valuable substance having a molecular weight of less than 100 and a cation using a nanofiltration membrane, characterized in that the nanofiltration membrane has a SO4 2‑ rejection rate of 90% or more when a 2000 mg / L aqueous MgSO4 solution is treated at 25°C under an operating pressure of 0.76 MPa, and the wastewater treatment method includes a step of adding a sulfate ion component to the wastewater.

The present application relates to a kind of fluorine ammonium salt solution impurity removal method, fluorine ammonium salt preparation method, belong to fluorine chemical technology field.The fluorine ammonium salt solution impurity removal method of the present application, first fluorine ammonium salt solution and fluorine silicic acid solution are mixed, the mixed solution with pH 2~3 is obtained, then lead compound and mixed solution are mixed, lead compound produces lead ion in liquid environment, and then lead ion and phosphate ion and sulfate ion in mixed solution occur precipitation reaction, then excess lead ion is removed using lead adsorbent, finally solid-liquid separation is carried out, and impurity removal liquid is obtained.The fluorine ammonium salt solution impurity removal method of the present application is simple to operate, can efficiently remove phosphate ion and sulfate ion in fluorine ammonium salt solution and / or fluorine silicic acid solution, without introducing other impurity ions.

To provide a technology for regenerating a lead-acid battery while being still in operation.SOLUTION: Electromagnetic waves having a frequency set to provide energy that dissociates lead sulfate molecules into lead cations and sulfate anions are emitted from outside the lead-acid battery so as to reach the electrodes of the lead-acid battery.SELECTED DRAWING: Figure 1

The invention provides a solvent-free organic-inorganic hybrid resin composition. The solvent-free organic-inorganic hybrid resin composition can provide a member having a high elastic modulus. The solvent-free organic-inorganic hybrid resin composition comprises the following components (A)-(C), and can obtain a self-supporting resin film after being fired at 230 DEG C or lower. (A) silica particles having an average primary particle diameter of 15-100 nm, and sulfate ions adhering to the silica particles as calculated by formula 1 below being 30 ppm or less; particle-attached sulfate ion (ppm) = combustion ion chromatography (ppm)-free ion chromatography (ppm) (Formula 1); (B) an epoxy resin having two or more epoxy groups and having a number average molecular weight of 150-3000 (inclusive); and (C) a curing agent.

This invention discloses a method for determining the concentration of sulfated glycosaminoglycans using fluorescence spectroscopy. The fluorescent probe carries a certain number of arginine residues. Utilizing the electrostatic interaction between the amino groups on the arginine residues and the sulfate ions on the sugar chains, a series of fluorescent probe molecules can align neatly along the sugar chains to form a stable fluorescent complex. Due to the small spatial distance between the fluorescent chromophores in the complex, the original fluorescence emission band shifts. By calculating the ratio of the fluorescence intensities at two points, the concentration of sulfated glycosaminoglycans can be determined. This invention provides accurate detection results, good reproducibility, and high sensitivity; the experimental materials are simple, saving a significant amount of time.

To provide an aqueous dispersion which is excellent in storage stability and from which a coating film excellent in water resistance can be formed. The aqueous dispersion of the present invention is an aqueous dispersion containing a fluorinated polymer having TFE units and PAVE units, and an aqueous medium, wherein the proportion of the PAVE units is 20 to 60 mol % to the total amount of the TFE units and the PAVE units, the content of the fluorinated polymer is 0.1 to 40 mass % to the total mass of the aqueous dispersion, the average particle size of the fluorinated polymer is 1 to 150 nm, the concentration of fluoride ions and the concentration of sulfate ions are each 50 mass ppm or less to the total mass of the aqueous medium in the aqueous dispersion, and the concentration of a hydrocarbon-based emulsifier is 100 mass ppm or less to the total mass of the fluorinated polymer.

This invention belongs to the technical field of sodium-ion battery cathode materials and discloses a method for preparing anhydrous iron-based Prussian white compounds, comprising the following steps: forming a suspension A with an iron-based Prussian white compound prepared by a traditional liquid-phase co-precipitation method and water; adding an aqueous solution B prepared with persulfate, surfactant, and sodium additive to suspension A to obtain suspension C; heating, stirring, and aging suspension C under the protection of an inert gas; removing the supernatant, centrifuging and washing the precipitate to obtain a white or light blue precipitate; and vacuum drying the precipitate to obtain the anhydrous iron-based Prussian white compound. This invention uses persulfate ions and surfactants to remove the water of crystallization from the iron-based Prussian white compound synthesized by liquid-phase co-precipitation under the strong oxidizing effect of persulfate, which can reduce the adverse effects of water of crystallization during battery charging and discharging on the stability of the organic electrolyte, and improve cycle stability and rate performance.

Provided is a method for producing lithium hydroxide, comprising the steps of: introducing a lithium salt solution into a salt solution compartment, and introducing water into an acidic solution compartment and a basic solution compartment; discharging, from the acidic solution compartment, a sulfuric acid solution including sulfuric acid ions separated from the lithium salt solution by an anion-selective ion exchange membrane and hydrogen ions generated by decomposing water through electrodialysis in a first bipolar membrane; discharging, from the basic solution compartment, a lithium hydroxide solution including lithium ions separated from the lithium salt solution by a cation-selective ion exchange membrane and hydroxide ions generated by decomposing water through electrolysis in a second bipolar membrane; and adding an additive to the lithium hydroxide solution discharged from the basic solution compartment to precipitate impurities and remove same.

Provided is a cathode active material for a lithium-ion battery that can reduce gas generation in the cathode and exhibits an excellent filling property. Also provided is a method of producing a cathode active material for a lithium-ion battery, the method including preparing a mixture comprising a lithium transition metal composite oxide having a layered structure, containing lithium and nickel in a composition, and containing secondary particles formed by aggregation of a plurality of primary particles, the secondary particles having a volume-average particle diameter greater than 3 μm and less than 5 μm, and a treatment solution containing a sulfate ion and a liquid medium, a concentration of the sulfate ion being in a range of 1 mass % to 9 mass %; and removing the treatment solution from the mixture.

To provide a new chemical solution capable of wet-etching silicon at high speed when manufacturing a semiconductor device or the like.SOLUTION: A silicon etching agent comprises an alkaline aqueous solution containing peroxodisulfate ions in a range of 0.05 to 65 mmol / L, particularly preferably 0.2 to 10 mmol / L, free of metals such as Ag, Al, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb and Zn (preferably each metal is 1 ppbw or less), and having a pH of 12.5 or more, preferably 13.0 or more and 13.7 or less. Production thereof is made possible by mixing high-purity ammonium peroxodisulfate and high-purity quaternary ammonium hydroxide with ultrapure water and uniformly dissolving them.SELECTED DRAWING: None

The present invention provides a pickling and passivation integrated solution, a process, and applications thereof. The pickling and passivation integrated solution comprises a mixed solution of sulfuric acid and nitric acid, wherein the sulfate ion concentration in the mixed solution is ag / L and the nitrate ion concentration is bg / L, satisfying the following conditions: a = (8-15) × b, and 60 g / L ≤ a + b ≤ 500 g / L. The pickling and passivation integrated process specifically comprises placing the black stainless steel to be treated into the pickling and passivation integrated solution, subjecting it to a pickling and passivation process at a pickling and passivation temperature of 50-90°C for a certain time t, ultimately yielding bright white stainless steel and waste liquid. After pickling and passivation, the plate surface exhibits a bright white color with a metallic luster, and its surface roughness is low, far superior to existing technologies. The passivation film thickness is qualified, and the plate surface quality is good.

A method of recovering metal from battery waste is provided. The method includes providing a battery waste leachate comprising metal ions and sulphate ions in an acidic medium, contacting the battery waste leachate with a reagent comprising ammonium ions to precipitate the metal ions as a double sulphate salt having formula (NH4)2M(SO4)2·6H2O, wherein M is one or more of Ni, Mn and Co, heating the precipitate at a temperature of 400° C. or more to form an anhydrous precipitate, dissolving the anhydrous precipitate in a solution comprising sulphate ions and crystallizing MSO4·6H2O from the resultant solution.