47 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 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.

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 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.

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.

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.

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.

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.

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.

The invention relates to high-strength weathering steel for a building structure and a preparation method of the high-strength weathering steel. The steel comprises the following chemical components: 0.035%-0.055% of C, 0.64%-0.76% of Si, 1.06%-1.18% of Mn, 0.108%-0.120% of P, less than or equal to 0.005% of S, 0.0032%-0.0044% of B, 0.092%-0.104% of Ti, 1.24%-1.36% of Cr, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O and the balance of Fe and impurities. The high-strength weathering steel has good cold working performance and welding performance; the steel not only can meet the requirements on the use and processing properties of steel for building structures, but also can be used in environments such as gas pipelines with high sulfate ions, seawater with high chloride ion content and the like.

The invention discloses an application of long-chain non-coding RNA (Ribonucleic Acid) Cslnc256 in regulating and controlling an anti-colletotrichum gloeosporioides posttranscriptional mechanism of a tea tree. According to the application of the long-chain non-coding RNA Cslnc256 in regulating and controlling the colletotrichum gloeosporioides resisting post-transcription mechanism of the tea tree, the long-chain non-coding RNA Cslnc256 can accurately act on Cslnc256-CsmiR395-CsSultr2 in the tea tree body; therefore, the defense mechanism of the plant is efficiently activated. When the expression of the Cslnc256 is inhibited, the competitive binding capacity of the Cslnc256 and the CsmiR395 is reduced, so that the concentration of the free CsmiR395 is increased, and further, the activity of the Cslnc256 on the target gene CsSultr2; 1 is an inhibitory effect. The regulation and control process can reduce the activity of sulfate transporter protein in the tea tree body, so that sulfate ions are accumulated in leaves, and the sulfate ions serving as important defense signal molecules can effectively improve the resistance of the tea tree to colletotrichum gloeosporioides and relieve scab expansion and tissue damage caused by pathogenic bacterium infection.

The present invention relates to systems for treating process water and sea water for secondary recovery in oil wells. In this situation, the present invention provides a hybrid system for treating produced water and sea water to be re-injected into a subsea oil reservoir, comprising (i) at least one inlet for the water to be treated, (ii) at least two treatment modules (20), each module comprising (ii-a) at least one set of micro / ultrafiltration membranes (20a, 20b, 20c) suitable for removing oils and solids from the water being treated, or (ii-b) at least one set of nanofiltration membranes (20a, 20b, 20c) suitable for removing sulphate ions from the water being treated, and (iii) at least one outlet for the treated water. The volume of water to be treated is led to a treatment module (20) comprising micro / ultrafiltration membranes or to a water treatment module comprising nanofiltration membranes, depending on the quality of the water, with regard to the oil and solid content or to the sulphate ion content. The present invention further provides a hybrid water treatment method associated with the above-mentioned system. Thus, the present invention provides a system and method for treating sea water and produced water, allowing the produced water to be re- injected without requiring an additional treatment system on the platform. Other advantages of the present invention include reduced oil discharge into the sea and reduced mounting, operation and maintenance costs, in comparison with an additional system on the sea installation.

A carbon-based solid acid catalyst, a preparation method of the catalyst, and a method to use the catalyst for hydrothermal conversion of biomass are provided. The preparation method of the carbon-based solid acid catalyst includes the following steps: S1. mixing pectin with water, adding concentrated sulfuric acid for activation, and adding a resulting mixture to an ionic resin with an aromatic ring matrix; S2. drying a material obtained in S1, crushing a dried material into a powder, and subjecting the powder to pyrolysis in a dry inert gas; S3. subjecting a solid obtained after the pyrolysis to sulfonation with concentrated sulfuric acid; S4. diluting a material obtained in S3 with water, filtering a resulting mixture, and washing a resulting filter residue with water until no sulfate ions are detected in washing water; S5. drying the filter residue.

The present application provides a resource utilization method and device for a lithium-containing mother liquor. The resource utilization method for a lithium-containing mother liquor comprises the following steps: providing a lithium-containing mother liquor containing lithium ions and sulfate ions; mixing the lithium-containing mother liquor with a phosphate solution and then carrying out lithium precipitation treatment to obtain a lithium-containing slurry; carrying out solid-liquid separation treatment on the lithium-containing slurry to obtain a adsorption-feed liquor and a first solid material; using a titanium-based adsorbent to adsorb lithium ions from the adsorption-feed liquor to obtain an adsorption tail liquor; and carrying out concentration and crystallization treatment on the adsorption tail liquor, wherein a molar ratio of lithium ions in the lithium-containing mother liquor to phosphate ions in the phosphate solution is 3:(0.7-0.8). The resource utilization method for a lithium-containing mother liquor can improve the lithium recovery rate and the purity of the recovered product.

Provided are an acidic gas treatment agent and an acidic gas treatment method based on an Mg-Al layered double hydroxide, said acidic gas treatment agent having a high adsorption capacity with respect to acidic substances and a long penetration time, thereby reducing the frequency of regeneration treatment of the treatment agent. The acidic gas treatment agent according to the present invention is formed from an Mg-Al layered double hydroxide having an average pore diameter of 30 nm or more as measured by a nitrogen gas adsorption method and a sulfate ion content of 1 mass% or less.

The purpose of the present invention is to provide a method for maintaining or increasing the content of rubisco protein in an alga body. Provided is a method for producing a protein, which makes it possible to maintain or increase the content of rubisco protein in an alga body of an alga by adding sulfate ions and / or thiosulfate ions to a culture medium and culturing the alga under conditions where the sulfate ions and / or the thiosulfate ions are not depleted.

This application relates to a low-alpha-ray silica and its preparation method. The method involves adding a high-purity sodium sulfate solution to water glass, followed by the sequential addition of dilute sulfuric acid solutions of varying concentrations for aging. The resulting precipitate is then calcined to obtain low-alpha-ray silica with Th ≤ 5 ppb and U ≤ 5 ppb. The sodium sulfate solution optimizes the precipitation process in two ways: first, it increases the ionic strength of the solution, compresses the colloidal double layer, and disrupts the metastable state of the system, thus promoting the aggregation and crystallization of the target precipitate; second, sulfate ions preferentially complex or inhibit the precipitation tendency of impurity cations based on the common ion effect; furthermore, the dilute sulfuric acid solution promotes the reaction and rapid precipitation of silicate ions with hydrogen ions, causing the Th and U ions encapsulated in the precipitate to precipitate out, thereby reducing the impurity content in the solution. This low-alpha-ray silica, due to its extremely low Th and U content and good thermal conductivity, can be widely used in high-performance and special-purpose chip packaging fields.

The application relates to the field of catalysts, and discloses a composite solid acid catalyst as well as a preparation method and application thereof. The composite solid acid catalyst contains a silicon-aluminum molecular sieve, a first metal active component, sulfate ions and a second metal active component; the first metal active component is selected from at least one of non-noble metal elements in groups IVB, VB, VIB, VIIB and VIII; the second metal active component is selected from at least one of noble metal elements; wherein the proportion of the amount of super strong acid with H0<-12 in the total amount of H0<-3 in the catalyst is more than 20%. The composite solid acid catalyst is suitable for treating complex hydrocarbon raw materials, is applied to reactions such as aromatic hydrocarbon isomerization, dismutation and alkyl transfer, dealkylation or hydrocracking, and has the advantages of high reaction activity and high product selectivity.

One embodiment of the present invention is a method for producing a purified, aqueous hydrogen peroxide solution, the method comprising: a step in which an aqueous hydrogen peroxide solution is passed through a first reverse osmosis membrane system; a step in which an additive is added to the aqueous hydrogen peroxide solution which has passed through the first reverse osmosis membrane system, the additive including a composite salt containing a sulfuric acid ion; and a step in which the aqueous hydrogen peroxide solution to which the additive has been added is passed through a second reverse osmosis membrane system.

The invention relates to the technical field of glycosylated hemoglobin detection, and discloses a biological sample treating fluid, a glycosylated hemoglobin detection kit and a glycosylated hemoglobin detection method. The biological sample treating fluid contains a reagent R1 and a reagent R2, wherein the reagent R1 contains latex microspheres and a buffer solution A; the reagent R2 contains a poly glycosylated hemoglobin monoclonal antibody, a buffer solution B and a surfactant; the surfaces of the latex microspheres have sulfate ions. The glycosylated hemoglobin detection kit contains the biological sample treatment liquid. The biological sample treating fluid has the advantages of high antibody stability, high detection result accuracy, high sensitivity, simple operation process and low production cost.

The application provides an extreme acidophilic sulfur-oxidizing bacterium and application thereof. The extreme acidophilic bacterium has strong oxidation on elemental sulfur and tetrathionate ions, is a chemolithoautotrophic acidithiobacillus, and can be used for removing elemental sulfur and tetrathionate ions in the environment, and has wide application prospects. The acidophilic sulfur-oxidizing bacterium has a preservation number of CGMCC No. 14839. The optimal growth temperature of the biological leaching and desulfurization provided by the application is normal temperature, and the optimal growth pH range is wide, so that the strain of the application has practical application significance. In addition, due to the characteristics of chemolithoautotrophy, the strain can improve the climate environment while recovering the environment.

The invention discloses a lead-acid storage battery based on a composite electrolyte and a preparation method of the lead-acid storage battery, particularly relates to the technical field of materials, and relates to the lead-acid storage battery based on the composite electrolyte and the preparation method of the lead-acid storage battery. The lead-acid storage battery based on the composite electrolyte is prepared from vinyl imidazole, 1, 3-propane sultone, azodiisobutyronitrile, concentrated sulfuric acid, nano silicon dioxide and niobium pentoxide. According to the invention, a large amount of corrosive hydrogen ions and sulfate ions are anchored on a stable polymer-inorganic framework in situ by utilizing strong interaction between sulfonic acid groups on an acidic ionic liquid polymer chain and the surface of the nano metal oxide, so that the concentration of free and transferable strong corrosive components in the electrolyte is greatly reduced; and the electrochemical corrosion power of the electrolyte is weakened.

A method for producing a fluorine-containing polymer includes a step for polymerizing a specific monomer in an aqueous dispersion containing a first fluorine-containing polymer and an aqueous medium to produce a second fluorine-containing polymer. The first fluorine-containing polymer contains a structural unit based on VdF and a structural unit based on at least one substance selected from the group consisting of HFP, fluorine-containing vinyl ether, CTFE, TFE, and fluorine-containing allyl ether. The fluorine-containing polymer has a Tg of -20°C or higher, a total heat of fusion of 40 J / g or less in the region of 100°C or higher as measured by DSC, a content of 100 mass ppm or less of fluorine-containing emulsifier, and a concentration of 10 mass ppm or less of sulfate ions.

The present application relates to a kind of emulsified oil and its preparation method and application, and the raw materials of emulsified oil include: carbon source, surfactant and water, carbon source includes high carbon alcohol and soybean oil mixture or biodiesel.The emulsified oil of the present application includes high carbon alcohol and biodiesel, high carbon alcohol is mainly composed of C16 fatty alcohol, fatty alcohol oxidation degradation process will form dicarboxylic acid, and dicarboxylic acid can be oxidized from both ends, greatly speed up the speed of high carbon alcohol degradation into a variety of fatty acid intermediates, in addition, biodiesel contains a large number of straight-chain fatty acids, under the action of microorganism, straight-chain fatty acids are rapidly degraded into a variety of fatty acid intermediates.Fatty acid intermediates can effectively provide nutrition for the growth of SRB, stimulate the growth of SRB, so as to promote the reduction of sulfate ion in AMD into sulfur ion, so that heavy metal in AMD and sulfur ion generate sulfide precipitate removal, thereby improving the operation efficiency of PRB.