48 results about "Metal sulfate" patented technology

The invention discloses a metal sulfide loaded biochar demercuration adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out mechanochemical grinding on a biomass raw material and metal sulfate through a high-energy ball mill to obtain a uniform precursor; and then performing one-step pyrolysis in an inert atmosphere, synchronously carbonizing the biomass and reducing the metal sulfate into metal sulfide, and finally preparing the metal sulfide nanoparticle and charcoal matrix strong coupling composite material. The method is simple in process, green and efficient, and avoids the defects of a traditional liquid phase method. The prepared adsorbent is high in active component dispersity, is firmly combined with a carrier, shows high adsorption capacity, high removal efficiency and good anti-interference stability for elemental mercury in flue gas, and has a wide application prospect in the field of mercury pollution control of coal-fired flue gas.

This invention relates to the field of aqueous metal battery technology, specifically to an aqueous tin metal battery electrolyte containing metal sulfate additives, its preparation method, and its application. The electrolyte is based on an alkaline electrolyte (such as KOH) and soluble tin salts (such as SnSO4, SnCl2), with added metal sulfates such as Li2SO4, ZnSO4, K2SO4, MnSO4, or Na2SO4 as additives at a concentration of 0.01 mol / L to 0.5 mol / L. The metal cations preferentially adsorb onto the surface of the metal anode to form an electrostatic shielding layer, regulating metal ion deposition behavior, inhibiting the formation of "dead tin," and significantly improving the battery's cycle stability and coulombic efficiency.

The present invention concerns a process for producing nickel and / or cobalt comprising the steps of: a) providing an aqueous metal sulfate feed solution comprising nickel and / or cobalt ions and impurities; b) separating a first part of impurities from the metal sulfate feed solution to obtain a raffinate; c) optionally subjecting the raffinate to an ion exchange treatment to remove a second part of impurities; and d) subjecting at least a portion of the optionally ion exchanged raffinate as electrolyte to electrowinning to produce nickel and / or cobalt.

A treatment process for crystallizing a metal sulfate involving pre-treating a feedstock comprising calcium, magnesium, and / or lithium impurities, the pre-treating involving pre-leaching the feedstock in the presence of a lixiviant, selectively extracting a first portion of any of the impurities from the feedstock, and forming a leached solution comprising an uncrystallized metal sulfate and any remaining impurities; and / or refining the leached solution and removing a second portion of any of the remaining impurities; and crystallizing the uncrystallized metal sulfate from the leached solution to form a crystallized metal sulfate. So processed, the crystallized metal sulfate may be battery-grade or electroplating-grade.

The present invention relates to a coagulant for cementitious compositions, in particular cementitious compositions having a binder as a source of aluminate and / or sulphoaluminate, the coagulant comprises a source of an alkali metal carbonate, a metal sulfate, an alkali metal hydroxide, and optionally an alkali metal bicarbonate, an alkaline earth metal hydroxide, or an alkaline earth metal oxide. The invention also relates to cementitious compositions having a binder as a source of aluminate and / or sulphoaluminate and the coagulation accelerator according to the invention.

This application discloses a composition, a thin film, and an optoelectronic device. The composition comprises a p-type organic compound and a first metal sulfate. The composition has good hole injection and / or hole transport performance. The composition can be used to prepare optoelectronic devices, improving the hole mobility of the optoelectronic devices, thereby improving the device efficiency, device lifetime, and performance stability of the optoelectronic devices.

A process for preparing metal oxide comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum. The process comprising:reacting a metal sulfate comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum with lithium hydroxide and optionally a chelating agent to obtain a solid comprising a metal hydroxide comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum, and a liquid comprising lithium sulfate, the metal sulfate comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum;separating the liquid and the solid from one another to obtain the metal hydroxide;submitting the liquid comprising lithium sulfate to an electromembrane process for converting the lithium sulfate into lithium hydroxide; andreusing at least a first portion of said lithium hydroxide obtained by the electromembrane process for reacting with the metal sulfate;reacting at least a second portion of said lithium hydroxide obtained by the electromembrane process with the obtained metal hydroxide to obtain a mixture of metal hydroxides; androasting said mixture of metal hydroxides to obtain the metal oxide.

This invention discloses a ZnS-modified S-doped Fe-N-C catalyst, its preparation method, and its applications, belonging to the field of electrocatalytic materials and energy conversion technology. Using metal sulfate as a single precursor, this invention employs a one-step in-situ sulfidation strategy to simultaneously construct Fe-N4 active sites, dope S atoms, and generate ZnS nanoparticles in situ via pyrolysis under nitrogen protection, thus preparing a ZnS@Fe-NSC structured catalyst. This material exhibits high CO selectivity, low overpotential, and excellent long-term stability. The ZnS nanoparticles act as electron donors, regulating the electronic structure of the Fe center, enhancing the Fe-N coordination bond strength, effectively inhibiting Fe dissolution, and improving the CO2 reduction reaction kinetics and catalyst durability. This invention features a single precursor, simplified process, and controllable structure, showing broad application prospects in electrocatalytic CO2 resource utilization and energy conversion devices such as Zn-CO2 batteries.

This invention discloses a method for the resource recovery of battery powder, belonging to the field of resource recycling technology. The method includes the following steps: adding a phosphorus-containing mixed acid solution and hydrogen peroxide to the battery powder for acid dissolution, filtering to obtain a metal leachate; adding a first pH adjuster to the metal leachate to adjust the pH to 1.5–2.7, filtering to obtain an iron-removed leachate and crude iron phosphate; adding a second pH adjuster to the iron-removed leachate to adjust the pH to 3.5–5.5, filtering to obtain a qualified leachate and hazardous iron-aluminum slag; mixing the hazardous iron-aluminum slag with a reducing agent, and then carrying out a solid-phase oxidation reaction under heating conditions to obtain a precursor; washing the precursor with hot water, filtering to obtain a metal sulfate solution and directly discardable iron-aluminum oxide slag; the method described has high recycling efficiency and can convert hazardous solid waste into general solid waste.

The invention relates to a lead-acid storage battery formation method, which comprises: adding acid to a lead-acid storage battery by using a sulfuric acid solution with a density of 1.02-1.06 g / ml and added with 0.5-1 wt% of metal sulfate; the acid-added battery is placed in a vacuum box, a charging circuit is connected to start formation, and the formation process comprises two stages: a low-current charging activation electrode stage and a vacuumizing formation and electrolyte rapid evaporation stage; the absolute pressure in the vacuum box is controlled to be 40-60 kpa at the stage of activating the electrode through low-current charging; the absolute pressure in the vacuum box is controlled to be 15-60 kpa in the vacuumizing formation and electrolyte rapid evaporation stage; adding a compound electrolyte into the battery after the formation is finished; a small amount of cetanol is added to the battery. According to the invention, the formation time of a common flooded battery can be reduced from about 10 hours to 4-5 hours, so that the production efficiency of the flooded lead-acid storage battery is greatly improved.

A green chemistry hydrometallurgical process for recovering one or more metals from a metal-containing material includes leaching the metal-containing material with formic acid, obtaining a leachate comprising the one or more metals as one or more metal formates, and precipitating at least one of the one or more metal formates. The metal-containing material may be a lithium-ion battery cathode material, resulting in Li formate remaining in solution and precipitation of salts including one or more of Ni, Co, and Mn formates. Steps may include filtration of the leachate, sulphurization of retained metal formate salts to produce metal sulphate salts, purification of filtered leachate by adding lithium carbonate and filtering, dewatering of the purified leachate, and thermal decomposition of resulting lithium salts to produce battery grade lithium carbonate. Carbon dioxide, water, and formic acid may be recovered and reused, without liquid or solid waste produced.

The application discloses a low-shrinkage viscose filament and a preparation method thereof, and comprises the following steps: (1) preparing viscose: impregnating, pressing, and crushing pulp in lye to obtain alkali cellulose, then aging, cooling, yellowing, grinding dissolving, defoaming, filtering, and ripening the alkali cellulose, and adding metal sulfate and a solidifying agent in the ripening process to prepare the viscose; (2) spinning: the viscose is processed by a metering pump, a filter, a spinneret, a coagulation bath, a drafting disc, a hot roller, and a deacidification roller to be spun. The application promotes the improvement of the crystal nucleus generation rate of the viscose in the spinning process as a whole by adding metal sulfate and a solidifying agent in the viscose preparation process and adjusting the concentration of the coagulation bath and the temperature of the hot roller in the spinning process, so that the crystal nucleus arrangement is more compact, the proportion of the crystal region is larger compared with the amorphous region, the overall densification of the fiber is improved, the stress is reduced, and the shrinkage rate after the fiber meets hot water is reduced.

This invention consists of the development of a new method to stabilize natural biopolymers, especially chitosan, for use as a flocculant by adding metallic sulfates in a certain proportion, thereby improving shelf life at least 10 times and improving turbidity removal performance by up to 50% compared to the biopolymer alone or other chemical flocculants-coagulants, without significantly increasing production costs, thus offering a competitive and environmentally compatible advantage for users of these products.

The invention discloses a composite catalyst, N, N, N-trimethyl-1-adamantyl ammonium hydroxide as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis. The composite catalyst comprises the following components in percentage by mole: 50%-75% of an active component and 25%-50% of an auxiliary agent, the active component is alkali metal halide or alkaline earth metal halide; the auxiliary agent is metal sulfate. The invention also provides application of the composite catalyst in synthesis of N, N, N-trimethyl-1-adamantyl quaternary ammonium salt by taking 1-amantadine and dimethyl carbonate as raw materials. A novel composite catalytic system is adopted, 1-amantadine, dimethyl carbonate and calcium oxide serve as raw materials to prepare N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and the N, N, N-trimethyl-1-adamantyl ammonium hydroxide is used for solving the problems that an existing production technology of N, N, N-trimethyl-1-adamantyl ammonium hydroxide needs two-step methylation, the technological process is complex, an ion exchange or electrolysis technology needs to be used for separation and purification, and the production cost is low. The treatment cost is high.

The application provides application of metal sulfate in preparation of rare earth up-conversion luminescent material; the metal includes alkali metal and / or alkaline earth metal. The application particularly applies alkali metal sulfate and / or alkaline earth metal sulfate in preparation of rare earth up-conversion luminescent material, which enhances the luminescent performance without obviously affecting the crystal phase and composition of the crystal. The application also provides a preparation method of the corresponding electrolyte adjuvant-enhanced rare earth up-conversion luminescent material, which uses alkali metal or alkaline earth metal sulfate as electrolyte adjuvant, hardly needs any post-treatment process, does not affect the original structure and proportion of the crystal, has good repeatability, involves only water as a green solvent in the whole process, has low cost, is easy to mass-produce, has good application prospect and potential economic benefits.

A method provides for separating nickel from an aqueous solution using an organic—aqueous extraction by performing one or more liquid-liquid extraction stages performed using an input aqueous solution comprising lithium ions, nickel ions, and cobalt ions and / or manganese ions, wherein each extraction stage comprises mixing an aqueous phase with dissolved metal sulfate with an organic solvent having dissolved di-(2,4,4-trimethylpentyl) phosphinic acid from 30% to 70% hydroxyl saponified with alkali, NH4+ or nickel counter ions. A collected purified aqueous phase comprising at least 90% of the nickel from the input aqueous solution and no more than about 5% of the each of the cobalt and manganese. The input aqueous solution is prepared from recovered lithium ion battery material.

A method for producing a lithium manganese-rich electrode is presented. The method includes purging a reactor vessel and liquid reagents with nitrogen gas to establish a substantially oxygen-free atmosphere, followed by mixing a metal sulfate solution and a basic reagent solution to initiate a co-precipitation reaction that forms metal hydroxide and metal oxyhydroxide nuclei. Subsequently, a mixture of oxygen and nitrogen is introduced into the reactor vessel atmosphere to regulate the average primary particle size of the resulting metal oxyhydroxide particles. This controlled mixture is maintained to produce polycrystalline secondary metal oxyhydroxide particles.

The present invention provides a controlled autoclave dissolution of metal powders for producing high-purity metal sulphate solutions, comprising the steps of: a. reacting an aqueous slurry comprising a metal powder with sulphuric acid in an autoclave section comprising one or more autoclave reactors at a temperature between 100°C and 250°C, thereby forming a metal sulphate solution having a residual amount of metal powder, whereby the molar ratio of sulphuric acid and metal in said autoclave section is lower than 1.0; and b. separating said metal sulphate solution from said residual metal powder.

The application belongs to the technical field of energy storage building materials, and discloses a gypsum-based light energy storage functional integrated building material, which is composed of a gypsum-based cementing material, a conductor precursor, porous light aggregates, chemical admixtures and mixing water, wherein the conductor precursor is composed of carbon nanomaterials, alkali metal sulfate, an anionic surfactant and water; through multi-dimensional material design, the conductor precursor prepared by using a hydrothermal / solvent thermal method has extremely high activity, the porous light aggregates and the chemical admixtures are introduced, and an "ion-electron" mixed conductive network is effectively constructed in the gypsum matrix, so that the electrochemical energy storage performance of the composite material is significantly improved, the integrated gypsum-based building material with excellent mechanical properties and high-efficiency electrochemical energy storage function is obtained, and the energy storage of the building envelope structure is realized.

The present invention provides a method for producing metal sulfides containing nickel and / or cobalt, the method comprising the steps of: i. forming an aqueous metal sulfate solution by reacting sulfuric acid with a raw material feed containing nickel and / or cobalt in water; ii. crystallizing the metal sulfate from the aqueous metal sulfate solution to form crystalline metal sulfate in a mother liquor containing uncrystallized metal sulfate; iii. separating the crystalline metal sulfate from the mother liquor; iv. reacting at least a portion of the uncrystallized metal sulfate with hydrogen sulfide in an acidic aqueous medium to obtain a slurry consisting of a solid phase containing a metal sulfide precipitate and an aqueous phase containing one or more impurities and sulfuric acid; and v. separating the solid phase and the aqueous phase.

The invention relates to a surface modified lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The surface modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material core layer and a metal sulfate / metal sulfite modified layer which is constructed on the surface of the core layer in situ in an amorphous form, preferably, the metal sulfurous acid is located on the inner layer of the modification layer, and the metal sulfate is located on the outer layer of the modification layer.

The present invention provides a dry coating material for a tundish, the dry coating material being capable of improving the strength of a constructed body and reducing a problem of odor generation. That is, the present invention provides a dry coating material for a tundish, the dry coating material containing a total of 3-15 mass% of a first binder that is one or more kinds selected from inorganic hydrate powders having a thermal decomposition initiation temperature of 40-300°C, and a total of 0.1-10 mass% of a second binder that is one or more kinds selected from powdered alkali silicates other than hydrates, powdered alkali sulfates other than hydrates, and powdered alkali phosphates other than hydrates, the content of a phenolic resin being 0.5 mass% or less (including 0), and the remainder being mainly a refractory raw material.

The present invention relates to a recycling process for a lithium battery electrode coating ink comprising a mixture in an organic solvent of a metal oxide-based active cathode material and lithium, a binder, and an electronic conductor. The recycling is carried out, in particular, by leaching in the presence of an aqueous sulfuric acid solution followed by a co-precipitation step of the metal sulfates of the active cathode material contained in the leachate. The resulting precipitate can then be processed for use as a feedstock for refining battery-grade sulfate salt.

This invention discloses a method for preparing a ceramic microsphere precursor and ceramic microspheres with an internal network structure. The method for preparing the ceramic microsphere precursor includes the following steps: preparing an emulsifier solution; mixing a ceramic substrate component with the emulsifier solution to prepare a ceramic microsphere precursor solution; separating the powder from the solvent in the ceramic microsphere precursor solution to obtain the ceramic microsphere precursor; the ceramic substrate component includes one or more of aluminates, metal chlorides, metal nitrates, and metal sulfates; the emulsifier includes a solvent, an emulsifier, and a surfactant, wherein the solvent is water, and the mass ratio of water, emulsifier, and surfactant is (75-85):(0.45-1.25):(0.0075-0.0325). This method achieves high strength and high temperature resistance in the prepared ceramic microspheres with an internal network structure, and the preparation process does not require the use of large amounts of organic solvents.

The application discloses a rubidium zinc sulfate compound, a nonlinear optical crystal of the rubidium zinc sulfate compound, and a preparation method and application of the rubidium zinc sulfate compound. 12 The rubidium zinc sulfate compound and the nonlinear optical crystal of the rubidium zinc sulfate compound both have a molecular formula of Rb2Zn2S3O 12 , do not have a symmetry center, are crystallized in a monoclinic crystal system, have a space group P21, have a unit cell parameter of Z=2, and have a unit cell volume of 2. The alkali metal sulfate salt usually has a large band gap, and the ultraviolet transmittance range thereof can be extended to about 150 nm, and is a candidate material for exploring UV or DUV optical crystals. In addition, the alkali metal sulfate salt has the properties of low melting point and high solubility, and therefore can be synthesized by using a high-temperature solution method, a hydrothermal method or an aqueous solution method, and the synthesis condition is relatively mild. Therefore, the alkali metal sulfate salt is an effective means for designing deep ultraviolet nonlinear optical materials.

The present invention provides a rust-preventive coating composition that can impart excellent rust prevention properties even to steel materials with residual rust or salt. [Solution] A rust-preventive paint composition comprising an epoxy resin (a), a polyamine (b), a powder (c), and a thickener (d), wherein the powder (c) comprises a metal sulfate (c-1) whose solubility in 100 g of water at 5°C is 0.1 g or more, and a zinc compound (c-2) whose solubility in 100 g of water at 20°C at pH 7.0 is less than 0.03 g, and whose solubility in 100 g of water at 20°C at pH 4.0 is 0.03 g or more, wherein the content of the metal sulfate (c-1) is 0.2% by mass or more and 70% by mass or less based on 100 parts by mass of the resin solids of the rust-preventive paint composition, and the content of the zinc compound (c-2) is 10% by mass or more and 200% by mass or less based on 100 parts by mass of the resin solids of the rust-preventive paint composition.

A method provides for separating nickel from an aqueous solution using an organic - aqueous extraction by performing one or more liquid-liquid extraction stages performed using an input aqueous solution comprising lithium ions, nickel ions, and cobalt ions and / or manganese ions, wherein each extraction stage comprises mixing an aqueous phase with dissolved metal sulfate with an organic solvent having dissolved di-(2,4,4-trimethylpentyl) phosphinic acid from 30% to 70% hydroxyl saponified with alkali, NH4 + or nickel counter ions. A collected purified aqueous phase comprising at least 90% of the nickel from the input aqueous solution and no more than about 5% of the each of the cobalt and manganese. The input aqueous solution is prepared from recovered lithium ion battery material.

A non-aqueous secondary battery, containing a positive electrode, a negative electrode, an insulating layer that is a single layer contacting the positive electrode on one side and the negative electrode on another side, and an electrolyte, in which (1) the insulating layer includes a polyvinylidene fluoride type resin and inorganic particles, the Mw of the polyvinylidene fluoride type resin is 900,000 to 1,500,000, and a content ratio of the inorganic particles in the insulating layer is 50% by mass to less than 90% by mass; (2) the insulating layer includes a resin and inorganic particles and has a thickness of 5 to 30 μm, and the inorganic particles include metal sulfate particles; or (3) the insulating layer includes a polyvinylidene fluoride type resin and inorganic particles, the polyvinylidene fluoride type resin contains, as polymerizing components, vinylidene fluoride and a monomer represented by the following formula (1):

Provided is a particulate active electrode material having a D50 particle diameter of at least 250 nm, comprising: particles of an oxide comprising Nb, the particles comprising at least a partial coating formed of a coating material; wherein the coating material is selected from: metal oxides, metal sulfates, metal phosphates, metalloid oxides, metalloid sulfates, and metalloid phosphates.

To provide a pressure oxidation leaching method capable of suppressing the deterioration of the electric power consumption unit of an air compressor even if the air compressor of a partial system is stopped.SOLUTION: When the air compressors 21, 22 of a partial series S1 are stopped, the high pressure air produced by the air compressors 21, 22 of the remaining series S2 is distributed and supplied to the autoclaves 10 of all the series S1 and S2. Material slurry containing metallic sulfide is supplied to autoclaves 10 of all series S1 and S2, and the metallic sulfide is subjected to pressure oxidation leaching to produce an aqueous solution of metallic sulphate. Since the autoclaves 10 of all the S1 blocks and S2 blocks are operated, the residence time of the metallic sulfide in the autoclaves 10 becomes long, and the deterioration of the electric power consumption rate of the air compressors 21 and 22 can be suppressed.SELECTED DRAWING: Figure 1