102 results about "Metal sulfate" patented technology

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 invention discloses a fused salt phase change heat storage composition as well as a preparation method and application thereof, and belongs to the technical field of heat storage. The fused salt phase change heat storage composition provided by the invention comprises the following components: a fused salt material, the melting point of the fused salt material is 100-1500 DEG C, and the absorption coefficient of the fused salt material to infrared waves is 0-100m <-1 >; the infrared absorbing material comprises at least one of transition metal chlorine salt, metal carbonate, metal sulfate, metal nitrate, a carbon-based material, silicon carbide and spinel. The fused salt phase change heat storage composition provided by the invention has high heat exchange power (average heat release power) and heat storage energy density. The invention further provides a preparation method and application of the fused salt phase change heat storage composition.

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.

The invention belongs to the technical field of chemical environmental protection, and particularly relates to a resourceful treatment method for desulfurization and denitrification waste liquid. Comprising the following steps: mixing the desulfurization and denitrification waste liquid with an oxidizing agent, and adjusting the pH value to 5-6, so that part of organic matters in the desulfurization and denitrification waste liquid are oxidized, and part of metal ions form metal sulfate precipitates, thereby obtaining primary treatment waste liquid; mixing the primary treatment waste liquid with a polymer, and adjusting the pH value to 8-12, so that residual metal ions in the primary treatment waste liquid form hydroxide precipitates; meanwhile, the polymer adsorbs suspended solids in the primary treatment waste liquid and gathers into large-particle flocs, and secondary treatment waste liquid is obtained; and carrying out solid-liquid separation on the secondary treatment waste liquid to obtain solid-liquid and liquid as raw materials for subsequent resource utilization. Through cooperative treatment, high salt, high suspended solids and high COD in the desulfurization and denitrification waste liquid are efficiently removed, so that the effluent meets the reuse water inlet requirement, and the method is an environment-friendly treatment technology.

The present invention relates to a setting accelerator composition for hardening a wet shotcrete formulation, comprising A1. Between 50% and 85% by weight of a cement containing at least 15% by weight of an aluminate, and A2. Between 15% and 50% by weight of at least one alkali metal sulfate.

The invention discloses an application of a sulfated oxide in catalysis of carbon dioxide desorption. A preparation method of the sulfated oxide comprises the following steps: dissolving soluble metal sulfate in water to obtain a solution A; adding an alkaline substance to increase the pH value of the solution A so as to precipitate the metal salt, and then aging to obtain a mixed solution B; and drying and calcining the mixed solution B to obtain the sulfated oxide catalyst. Compared with the prior art, the preparation process of the catalyst is simple and convenient, and the catalytic performance of the catalyst is superior to that of an unsulfated metal oxide catalyst; the metal ions and the sulfated metal oxide have a synergistic effect; the catalyst is good in stability and can be recycled; the influence on the CO2 absorption performance of the amine solution is small.

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.

To provide a dry coating material for a tundish, which can improve the strength of the applied body and reduce the problem of odor generation. [Solution] A dry coating material for tundishes containing a total of 3 to 15 mass% of a first binder which is one or more types selected from inorganic hydrate powders having a thermal decomposition onset temperature of 40 to 300°C, and a total of 0.1 to 10 mass% of a second binder which is one or more types selected from powdered alkali silicates other than hydrates, powdered alkali sulfates other than hydrates, and powdered alkali phosphates other than hydrates, and which contains 0.5 mass% or less (including 0) of phenolic resin, with the remainder being mainly refractory raw materials.

A process for removing impurity metal ions from an acidic metal sulfate containing stream by adding an effective amount of a reagent, comprising at least one dialkyldithiophosphate compound with the alkyl chain length of C1 to C8 to the acidic metal sulfate containing stream to form impurity metal ion complexes; and separating the impurity metal ion complexes from the acidic metal sulfate stream.

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.

The invention provides a process for generating a metal sulphide comprising nickel and / or cobalt, comprising the steps of: i. forming an aqueous metal sulphate solution by reacting sulphuric acid with a raw material feed comprising nickel and / or cobalt in water; ii. crystallizing said metal sulphate from said aqueous metal sulphate solution to form a crystallized metal sulphate in a mother liquor, the mother liquor comprising an uncrystallized metal sulphate; iii. separating said crystallized metal sulphate from said mother liquor; iv. reacting at least a portion of said uncrystallized metal sulphate with hydrogen sulphide in an acidic aqueous medium, thereby obtaining a slurry consisting of a solid phase comprising a metal sulphide precipitate and an aqueous phase comprising one or more impurities and sulphuric acid; and v. separating said solid phase and said aqueous phase.

The application discloses a kind of basic magnesium sulfate-based photocatalytic materials and preparation method thereof.The basic magnesium sulfate-based photocatalytic material includes: basic magnesium sulfate and transition metal element, the basic magnesium sulfate is 5Mg (OH) 2·MgSO4·7H2O Irregular cement, and the transition metal element includes Ti, Zn, Cu, Fe, Mn, Co, Ni, Ce and the like.The preparation method includes: organic weak acid, magnesium sulfate, transition metal sulfate and water are uniformly mixed to form mixed solution;Active magnesium oxide and nucleating agent are uniformly mixed to form mixed powder;The mixed powder, pore-forming agent and mixed solution are uniformly mixed, and then reaction molding is carried out to obtain the basic magnesium sulfate-based photocatalytic material.The basic magnesium sulfate-based photocatalytic material provided by the application is convenient to form, has good mechanical strength, has good photocatalytic activity, and is a new type of photocatalytic material easy to recycle.

The present invention relates to a method for treating an effluent comprising at least one metal sulphate, the method comprising at least the following successive steps: a) adding an alkaline chemical agent to the effluent, the chemical agent being selected from: magnesium oxide (MgO), magnesium hydroxide (Mg(OH)2) and magnesium carbonate (MgCO3), in order to adjust the pH to a value of between 1 and 9.5, thereby causing the formation and precipitation of at least one metal hydroxide, and separating the effluent from the solids comprising the one or more precipitated metal hydroxides; b) optionally repeating step a) in order to reach a pH of between 1 and 9.5 that is higher than that selected in step a); c) adding lime to the remaining effluent to increase the pH until an optimum value of between 10.2 and 12.5 is reached, depending on the temperature of the effluent, which may be ambient temperature or a controlled temperature, and on the one or more alkaline agents added in steps a) and optionally b), so as to produce a basic solution comprising precipitated white gypsum; d) separating the white gypsum precipitated in step c) from the basic solution so as to obtain a purified basic aqueous solution. This method makes it possible to obtain white gypsum of high purity, metal hydroxides precipitated selectively or in a mixture, and purified water that can be discharged into the receiving environment or the sanitation network, and / or recycled.

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 provides a method for the co-recycling of waste lithium-ion battery materials and high-grade nickel matte, comprising the following steps: (1) mixing waste lithium-ion battery materials with high-grade nickel matte to obtain a mixture; (2) calcining the mixture to obtain a co-calcined solid product; (3) leaching the solid product with deionized water to obtain a lithium-containing aqueous leachate and a leachate residue; (4) acid-dissolving the leachate residue to obtain an acidic leachate; after precipitation, impurity removal, and extraction separation, the leachate yields a metal sulfate; (5) purifying the lithium-containing aqueous leachate to obtain lithium carbonate. This invention achieves priority lithium extraction from retired lithium-ion batteries and atmospheric pressure acid leaching of high-grade nickel matte to prepare nickel sulfate, converting valuable metals in lithium batteries into water-insoluble forms, achieving a lithium leaching rate of over 92% and efficient separation of valuable metals.

Provided is a method for preparing a cobalt-free layered cathode material by Li+ / H+ exchange, including adding a metal sulfate solution, a precipitant solution, and a complexing agent solution dropwise into an aqueous ammonia solution to obtain a mixed solution, and subjecting the mixed solution to precipitation complexation to obtain a hydroxide precursor; and mixing the hydroxide precursor with a lithium source to obtain a mixture, and subjecting the mixture to pre-sintering and crystallization in sequence to obtain the cobalt-free layered cathode material, a temperature for the pre-sintering being less than a temperature for the crystallization, where metal sulfates include at least two selected from the group consisting of non-cobalt transition metal sulfates.

The invention belongs to the technical field of chemical synthesis, and discloses a method for synthesizing fatty diol from straight-chain fatty olefin through a one-pot method under catalysis of titanium silicalite molecular sieve loaded sulfate. Through metal sulfate modification, acid sites on the surface of the titanium silicalite molecular sieve are increased, so that the catalytic epoxidation function of tetra-coordinated titanium and the catalytic hydrolysis function of the acid sites have a synergistic effect, and olefin epoxidation-epoxide hydrolysis reactions are connected in series. According to the process, olefin can be almost completely converted, and the problem of raw material recovery does not need to be considered. The bifunctional catalyst is used for preparing 1, 2-pentanediol from 1-pentene through a one-pot method, the conversion rate of 1-pentene is larger than 98%, the yield of 1, 2-pentanediol is larger than 77%, intermediate separation and additional acid and alkali are not needed in the whole process, the equipment corrosion risk is reduced, the problems of environmental pollution and complex process of a traditional process are solved, and the catalyst can be recycled and reused for multiple times.

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 the technical field of catalytic denitration, in particular to a metal sulfate modified supported aluminum-based denitration catalyst and a preparation method and application thereof.The preparation method comprises the following steps that 1, copper salt and manganese salt are dissolved in deionized water according to a certain molar ratio, gamma-Al2O3 is added into the mixed solution, and magnetic stirring is conducted; 2) evaporating the solvent in an oil bath, and drying in a drying oven; and (3) after the drying is finished, grinding a solid sample, putting the solid sample into a crucible, roasting in a muffle furnace, cooling and grinding a final product to obtain the CuSO4-MnSO4 / Al2O3 catalyst, marking the catalyst as xCuSO4-yMnSO4 / Al2O3, and respectively representing the loading capacities of CuSO4 and MnSO4 and the unit as mmol / g gamma-Al2O3. The denitration activity of the catalyst prepared by the preparation method disclosed by the invention is greater than 80% in a range of 300-500 DEG C.

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.

The application discloses a short-process lithium extraction method of lithium clay ore, and belongs to the technical field of lithium extraction. 3+ The main component of the alunite formed in the form of alum is XAl3(SO4)2(OH)2 (X is Na or K). The alunite is insoluble in water and slightly soluble in sulfuric acid, has good crystallinity, and has less adsorption and entrainment of free ions, and almost no entrainment of lithium. The application fully utilizes the characteristics of the alunite, converts Al 3+ into alunite precipitation which is dissolved from the lithium ore by acid, reduces the Al / Li ratio of the leaching solution, and finally collects lithium in the form of lithium carbonate by using the calcium-magnesium resin to adsorb a small amount of calcium and magnesium ions.

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.