127 results about "Ferric iron compound" patented technology

The invention discloses a device and a method for regenerating a powdery iron oxyhydroxide desulfurizer and purifying sulfur, and the device and the method are characterized in that invalid iron oxyhydroxide is completely reduced into a ferrous oxide and ferrous sulfide after sulfide is added, the reaction of an iron compound is enhanced through ultrasound and stirring, and the separation of the iron compound and the sulfur is promoted. Further fully aerating to fully oxidize the ferrous iron to generate new iron oxyhydroxide; at the moment, the iron oxyhydroxide is in a completely dispersed state, the single particle size is not higher than 1 micron, and small flocs with the particle size of 0-5 microns are formed in laminar water; the surface of the sulfur has hydrophobicity, and the sulfur is gathered to generate hydrophobic self-flocculation, so that large flocs with the particle size of 30-300 microns are formed in the laminar water; the mixture is flushed by water flows with different flow speeds, the iron oxyhydroxide with small particle size is flushed out at a certain flow speed, and the sulfur with large particle size is suspended in the grading pipe, so that the regeneration of the iron oxyhydroxide desulfurizer and the purification of the sulfur are realized.

To provide a heavy metal insolubilizing material for insolubilizing heavy metal contained in a heavy metal contaminant (for example, incineration ash, soil, and drainage water), which can exhibit an excellent insolubilization effect to a plurality of kinds of heave metal (for example, arsenic and hexavalent chromium), in a short time (for example, 2 to 3 hours).SOLUTION: A heavy metal insolubilizing material contains an iron compound composed of either or both of ferrous sulfate monohydrate and ferrous chloride tetrahydrate, and a magnesium compound composed of one or more selected from the group consisting of magnesium sulfate heptahydrate, magnesium sulfate nonhydrate, and magnesium sulfite hexahydrate. A ratio of the iron compound in the total amount of the iron compound and the magnesium compound is 5 to 80 mass%. The heavy metal insolubilizing material can be prepared in a powdery form.SELECTED DRAWING: None

The present application provides an electrode for a lithium ion secondary battery, the electrode having an active material layer containing a particulate active material, the active material containing an organic sulfur compound and an iron compound, wherein A S , A F , and D satisfy the following inequality (1) A S × A F × D > 7000, wherein A s represents the content of sulfur element in the active material, in mass%, A F represents the content of iron element in the active material, in mass%, and D represents the coating density of the active material, in mg / cm 2 The present application aims to improve the comprehensive performance of the charge-discharge capacity, capacity retention rate, and energy density of a lithium ion secondary battery.

This invention provides a method for simulating the preparation of an industrial iron-contaminated catalytic cracking catalyst. Step 1 involves reacting a first feedstock with a fresh catalytic cracking catalyst, stripping to remove hydrocarbons, then performing coke burn regeneration, followed by stripping and cooling. The treated catalytic cracking catalyst is then recycled with the first feedstock for a cycle of reaction, stripping, regeneration, and stripping, repeated at least once. Step 2 involves reacting a second feedstock with the catalytic cracking catalyst obtained in Step 1, stripping to remove hydrocarbons, then performing coke burn regeneration, followed by stripping and cooling. The treated catalytic cracking catalyst is then recycled with the second feedstock for a cycle of reaction, stripping, regeneration, and stripping, repeated at least once. Step 3 involves subjecting the catalytic cracking catalyst obtained in Step 2 to hydrothermal aging treatment. The first feedstock contains alkali metal compounds, alkaline earth metal compounds, and / or transition metal compounds other than iron, while the second feedstock contains iron-containing compounds.

A method for treating a gastrointestinal condition includes preparing an aqueous extract of bioactive compound by adding dried green tea material to hot water and filtering the aqueous extract; adding a solution of an iron-containing compound to the filtered aqueous extract to form a complex or chelate of the bioactive compounds with iron; and drying the solution at a temperature between 80 to 150 degrees Fahrenheit to obtain a fine granular or powdered state.

The invention discloses a self-supporting compound lithium ion battery electrode and a preparation method thereof. The preparation method of the self-supporting compound electrode comprises the following steps: (1) reacting a mixed aqueous solution of an iron-containing compound, a nickel-containing compound and urea with a conductive substrate to obtain a self-supporting substrate containing an iron / nickel precursor; and (2) carrying out annealing treatment on the self-supporting substrate containing the iron / nickel precursor in an ammonia gas atmosphere, cooling, and then purging and passivating by inert gas to obtain the self-supporting compound electrode loaded with the nano Fe3O4 / Ni3FeN. The preparation method provided by the invention is simple and low in cost, and the self-supporting electrode has good cycling stability and rate capability, is suitable for industrial large-scale production, and can be widely applied to the field of lithium ion battery materials.

The invention discloses a method for treating antibiotic wastewater by using a nano confinement iron cluster catalyst. The method comprises the following steps: mixing and pyrolyzing an iron-containing compound and a carbon and nitrogen-containing precursor to prepare the nano confinement iron cluster catalyst, and then, adding the catalyst and an oxidizing agent into antibiotic-containing wastewater to carry out catalytic oxidation reaction. According to the catalyst, a high-activity iron cluster is stabilized by utilizing a nano confinement effect, an oxidizing agent can be efficiently activated, antibiotics are rapidly degraded through a non-free radical path with synergistic singlet oxygen and electron transfer, and the catalyst shows excellent catalytic activity, cycling stability and adaptability to different water qualities. The method is simple in process, mild in condition and environment-friendly, and a new strategy is provided for efficient deep treatment of the antibiotic wastewater.

Provided is a novel method for producing an adsorbent comprising an iron compound and having a large adsorption capacity. An adsorbent having a specific surface area of 200 m2 / g or more, a primary particle size of 10 nm or less, an iron content of 450 g / kg or more, and a moisture content of 100 g / kg to 300 g / kg can be obtained by the method for producing an adsorbent, the method including: a first step for adding a polyferric sulfate aqueous solution to an alkali aqueous solution to form a slurry; a second step for adjusting the pH of the slurry to 5.0 to 9.0; and a third step for subjecting the slurry to solid-liquid separation, washing the obtained cake, and adjusting the moisture content of the washed cake.

The invention belongs to the technical field of food, and discloses a red date polysaccharide-iron compound and a preparation method thereof, and the compound comprises the following components by weight: 1-5 parts of red date polysaccharide; 5-20 parts by weight of a complexing agent; 15-30 parts by weight of a ferric iron compound; 5-15 parts by weight of alkali; and 200 to 300 parts by weight of deionized water. The red date polysaccharide-iron compound prepared by the invention has good dissolution performance, high stability and good solubility, and compared with a traditional iron supplementing agent, the red date polysaccharide-iron compound is more easily absorbed by an organism. In addition, the red date polysaccharide-iron compound has antioxidant activity in vitro. The preparation process is simple, the raw materials are rich in source, and the traditional Chinese medicine composition can be used for preventing or treating iron-deficiency anemia and provides a new choice for a novel iron supplementing agent.

The invention relates to a metallurgical treatment method of high-grade cobalt-containing copper sulfide concentrate, which comprises the following steps: carrying out first-stage presoaking on the cobalt-containing copper sulfide concentrate to obtain first-stage presoaking liquid and first-stage presoaking slag; grinding the first-stage presoaking residues until the particles of the first-stage presoaking residues are smaller than 200 meshes and account for 95 wt% or above, introducing oxygen, and performing second-stage presoaking to obtain second-stage presoaking liquid and second-stage presoaking residues; the copper grade of the cobalt-containing copper sulfide concentrate is 60 wt% or above. In the presoaking process, a large amount of copper oxide minerals and iron compounds are leached into a solution, so that the iron content in the presoaking residues is reduced, and generation of refractory substances such as copper ferrite is reduced; and compared with the raw ore amount, the ore amount is reduced by 40% or above, the follow-up recovery difficulty is remarkably reduced, and the leaching rate of the cobalt-containing copper sulfide concentrate is effectively increased.

The invention relates to the technical field of preparation of lithium ion battery positive electrode materials, in particular to an in-situ composite perovskite positive electrode active material and a preparation method and application thereof. The preparation method of the in-situ composite perovskite positive electrode active material comprises the following steps: mixing a lithium compound, a phosphate compound, a carbon source, a rare earth metal compound, a cobalt compound and / or a nickel compound with an iron compound or an iron compound and a manganese compound in a solvent to obtain mixed slurry; carrying out spray drying on the mixed slurry to obtain composite precursor powder; and sequentially carrying out pre-sintering treatment and formal sintering treatment on the composite precursor powder to prepare the in-situ composite perovskite positive electrode active material. Through the solution mixing and co-sintering process, the in-situ compounding of the perovskite phase and the positive electrode base material at the atomic scale is realized, the interface bonding and ion transmission efficiency between the perovskite phase and the positive electrode base material are remarkably enhanced, and the cycling stability is remarkably improved while the high capacity of the obtained positive electrode active material is maintained.

Provided herein are methods and compositions for producing cement and iron from non-carbonate materials. Methods include beneficiating a non-carbonate staring material to provide a calcium-rich and an iron-rich fraction, and treating the two fractions to produce cement and iron compound, respectively.

The invention relates to the technical field of energy storage batteries, battery swap stations, electric automobiles and large battery packs, and discloses a composition of a heterogeneous liquid fire extinguishing agent, the heterogeneous liquid fire extinguishing agent and a preparation method and application of the heterogeneous liquid fire extinguishing agent. The composition contains a phosphorus-containing ferrocenyl compound, a foaming agent, a penetrating agent, a flame retardant, a thickening agent, a dispersing agent, an adsorbent and water, wherein the structure of the phosphorus-containing ferrocenyl compound is shown as a formula (1). The phosphorus-containing ferrocene compound in the heterogeneous liquid fire extinguishing agent can be decomposed into iron atoms and phosphorus atoms after encountering flame, the iron atoms, the phosphorus atoms and free radicals in the flame are subjected to cyclic catalytic reaction, and the free radicals such as H, O and OH are continuously consumed until the flame disappears; the heterogeneous liquid fire extinguishing agent has cooling and fire extinguishing functions, terminates a thermal runaway reaction and prevents reburning; and meanwhile, the heterogeneous liquid can adsorb flammable and explosive gas and soot particles generated by combustion, so that the poisoning and explosion risks are reduced.

The invention relates to a positive electrode active material precursor for a lithium ion secondary battery and a method for producing the positive electrode active material precursor for a lithium ion secondary battery. A positive electrode active material precursor for a lithium ion secondary battery, the positive electrode active material precursor containing a metal composite hydroxide in the form of particles having a core-shell structure in which the surface is coated with an iron compound, the core-shell structure comprising a core part and a shell part, the core part containing nickel and aluminum as metal elements, and the shell part containing nickel and aluminum as metal elements. The core part contains iron as a metal element, when the composition of the core part is represented by Ni (1-x) Alx (OH) 2, 0.01 < = x < = 0.2, and the molar ratio (M2 / M1) of the molar amount (M1) of the metal element of the core part to the molar amount (M2) of the metal element of the shell part is M2 / M1 = 1 / 100-1 / 5.

Disclosed is a metal element recovery method which comprises: a step (1) for obtaining an acidic first solution by dissolving a metal in a crushed product of a lithium ion battery in an acidic aqueous solution; a step (2) for changing divalent iron ions in the first solution to trivalent iron ions; a step (3) for obtaining a second solution and a first precipitate that contains an iron compound or the like by adjusting the pH of the first solution to fall within the range of 3.0 to 5.0; a step (4) for obtaining a third solution and a second precipitate that contains copper sulfide by adding a sulfurizing agent to the second solution and adjusting the pH of the second solution to fall within the range of 4.0 to 5.0; a step (5) for obtaining a fourth solution and a third precipitate that contains nickel hydroxide or the like by adjusting the pH of the third solution to fall within the range of 7.0 to 8.5; and a step (6) for obtaining a fifth solution and a fourth precipitate that contains a lithium compound by concentrating the fourth solution while injecting a carbon dioxide gas thereinto.

The invention discloses a method for treating zinc smelting jarosite slag, which comprises the following steps: uniformly mixing the zinc smelting jarosite slag with biochar and calcium oxide source solid waste, roasting, and reducing an iron compound in the zinc smelting jarosite slag by using reducing gases such as H2, CO and CH4 generated by pyrolysis of the biochar, thereby obtaining the zinc smelting jarosite slag. And sulfur compounds in the iron vitriol slag are fixed through the added calcium oxide source solid waste to generate calcium sulfate, then air is introduced for continuous roasting, iron powder obtained through reduction is oxidized into ferroferric oxide, and finally ferroferric oxide powder is obtained through magnetic separation. The method not only is low in energy consumption, but also can reduce emission of greenhouse gas CO2 generated by incineration treatment of the biomass raw materials and release of sulfides in the iron vitriol slag.

A polishing slurry for polishing surfaces containing tungsten material, the slurry containing abrasive grains, an iron-containing compound, and an oxidizing agent, wherein the abrasive grains comprise silica particles, the average particle size of the abrasive grains is 40–140 nm, and the silanol group density of the silica particles is 8.0 particles / nm. 2 The following is a grinding method that uses a grinding fluid to grind a surface containing tungsten material.

The present invention provides a cathode active material comprising primary particles which include at least one transition metal and further comprise an iron phosphide compound, and thus exhibiting excellent charge / discharge capacity and rate performance on the basis of excellent electronic conductivity.

This invention discloses a three-dimensional self-supporting electrode, its preparation method, and a lithium-ion battery. The preparation method includes the following steps: dissolving resorcinol and formaldehyde in a mixed solution of ethanol and water, adding ammonia, and stirring until fully mixed to obtain an organic polymer solution; adding an iron-containing compound to the organic polymer solution and stirring until fully dissolved to obtain a precursor solution; transferring the solution to a reaction vessel, placing a three-dimensional conductive substrate in the reaction vessel for hydrothermal reaction to obtain a three-dimensional self-supporting substrate containing an iron / carbon precursor; drying the three-dimensional self-supporting substrate containing the iron / carbon precursor, annealing it in an inert atmosphere, and naturally cooling it to room temperature to obtain a three-dimensional self-supporting electrode loaded with in-situ carbon-coated nano-Fe3O4. The preparation method provided by this invention is simple and low-cost, and the three-dimensional self-supporting electrode exhibits good cycle stability and rate performance, making it suitable for large-scale industrial production and widely applicable in the field of lithium-ion battery materials.

To suppress an unpleasant odor when an iron compound and collagen peptide or elastin peptide are formulated in an oral liquid composition.SOLUTION: The oral liquid composition comprises (A) an iron compound, (B) at least one peptide selected from the group consisting of collagen peptide and / or elastin peptide, and (C) at least one plant extract selected from the group consisting of lemon balm extract, Houttuynia cordata extract, artichoke extract and rosemary extract.SELECTED DRAWING: None

The invention provides a defluorination agent and a preparation method and application thereof, and the preparation method comprises the following steps: mixing two or more of an iron-containing compound, an aluminum-containing compound, a magnesium-containing compound, a titanium-containing compound, a calcium-containing compound or a lanthanum-containing compound with an alcohol solution, and carrying out ball-milling treatment on the obtained mixed material in a ball-milling tank to obtain a metal-doped carbon material; adding minerals into the metal-doped carbon material, continuously mixing, and standing to obtain the defluorination agent. The coverage rate of metal atoms on the surface of the defluorination agent provided by the invention is 5-14%, and the defluorination rate reaches 83-94%. The invention also provides application of the fluorine removal agent. The method provided by the invention is simpler, more time-saving and more agent-saving, and has better economical efficiency, and the defluorination agent can realize a better defluorination effect under a wider water quality condition.

The present application relates to a composite cathode active material comprising an iron phosphide compound, and further discloses a preparation method thereof, as well as an application thereof for use in the preparation of battery positive electrode plates and secondary batteries. The composite cathode active material of the present application comprises lithium iron phosphate particles, lithium iron phosphate particles coated with carbon, lithium iron phosphate particles coated with an iron phosphide compound, lithium iron phosphate particles coated with an iron phosphide compound and carbon, and iron phosphide compound particles.

The invention provides a Fe-Cu catalyst, the Fe-Cu catalyst comprises an iron-containing compound, copper, an electronic auxiliary agent and a structure auxiliary agent, the iron-containing compound is a mixture of Fe3O4, Fe7C3 and Fe5C2, and the mass ratio of Fe3O4 to Fe7C3 to Fe5C2 is 1: (0.5-2): (0.5-2). The Fe-Cu catalyst disclosed by the invention has relatively high activity, can greatly improve the selectivity of a C8 + aviation kerosene product, provides a new idea for preparing high-added-value chemicals through carbon dioxide hydrogenation, and has a relatively good industrial application prospect.

A positive electrode active material precursor for a lithium-ion secondary battery, containing a metal composite hydroxide, whereinthe metal composite hydroxide is in a form of a particle having a core-shell structure whose surface is coated with an iron compound,the core-shell structure is constituted by a core portion and a shell portion,the core portion contains nickel and aluminum as metal elements,the shell portion contains iron as a metal element,when a composition of the core portion is represented by Ni(1-x)Alx(OH)2,0.01≤x≤0.2 is satisfied,anda molar ratio (M2 / M1) between a molar amount M1 of the metal element in the core portion and a molar amount M2 of the metal element in the shell portion satisfiesM2 / M1=1 / 100⁢ to⁢ 1 / 5.

To suppress a change in an appearance color in a composition in which polyphenol and an iron compound are mixed.SOLUTION: A composition in which polyphenol and an iron compound are mixed and pH is 5.2 or less. A composition which is obtained by mixing prescribed polyphenol or prescribed amino acid with the composition. A method for using any of the compositions as an oral composition or an external composition. A method for suppressing a change in the appearance color of a composition, characterized by suppressing pH to 5.2 or less in the composition in which polyphenol and an iron compound are mixed.SELECTED DRAWING: Figure 1

This magnetic material comprises magnetic nanoparticles (10) and a low-carbon organic substance (20) having 4 or less carbon atoms. The low-carbon organic substance (20) comprises C, N, O, and H, and has a structure having an amide bond. The magnetic nanoparticles (10) are each formed of Fe, an Fe-containing alloy material, or an Fe-containing compound. The magnetic nanoparticles (10) each have a mean particle diameter of 20-200 nm when being calculated as a ball having the same volume, and have a volume fraction of 80-95 vol%.

The application discloses a preparation and application of an iron-doped titanium suboxide electrode. The iron-doped titanium suboxide electrode is prepared by mechanically treating an iron compound and titanium suboxide, is used as an anode, and is used for synthesizing a disinfectant with natural seawater as an electrolyte and being coupled with photovoltaic technology, so that a solar energy driven electrolysis device is successfully constructed, the disinfectant with active components of hypochlorous acid is synthesized, and pathogenic bacteria in ballast water are killed. The electrode is composed of non-noble metal elements, and the price is much lower than that of a commercial size stable anode composed of noble metals ruthenium and iridium, and the electrode shows a reaction activity which is significantly higher than that of the commercial size stable anode, and the problem that high-abundance chlorine ions in seawater are difficult to be selectively oxidized to hypochlorous acid is solved. The electrode is stable in chemical properties, friendly to the environment, and cannot cause secondary pollution, and can be driven by solar energy to electrochemically synthesize a disinfectant without depending on power resources in ocean navigation, so that disinfection and sterilization of ship ballast water are realized, and the electrode is very worth promoting.

A chemical mechanical polishing composition comprises, consists of, or consists essentially of a liquid carrier, ceria particles in the liquid carrier, an oxidizer including an iron (iii) compound or a cerium (IV) compound, an acid having a ligand including an aromatic group or a nitrogen containing aromatic group, and has a pH of less than about 4. A method for polishing a hard carbon containing substrate includes contacting the substrate with the polishing composition and abrading the substrate with the polishing composition to remove a portion of the hard carbon layer from the substrate and thereby polish the substrate.

The application provides a modified lithium iron manganese phosphate positive electrode material, a preparation method thereof and a lithium ion battery. The preparation method of the modified lithium iron manganese phosphate positive electrode material comprises the following steps: S1, mixing a lithium source, an iron source, a manganese source, a phosphorus source and a carbon source with a solvent to obtain a slurry; wherein the iron source is a mixture of an iron phthalocyanine compound and an inorganic iron compound, the manganese source is a mixture of a solid-supported manganese porphyrin and an inorganic manganese compound, and the solid-supported manganese porphyrin comprises an alumina carrier and a manganese porphyrin supported on the surface of the alumina carrier; S2, performing spray drying treatment on the slurry to obtain a precursor; and S3, performing sintering treatment on the precursor in an inert atmosphere to obtain the modified lithium iron manganese phosphate positive electrode material.

The invention provides a preparation method and application of ammonium ferric citrate. The preparation method of the ferric ammonium citrate comprises the following steps: carrying out a first reaction on an iron compound and first ammonia water, introducing air in the process of the first reaction, and preparing a first slurry, and carrying out solid-liquid separation on the first slurry, taking a solid, carrying out second reaction on the solid, second ammonia water and citric acid in a solvent, and concentrating to prepare the ferric ammonium citrate. According to the preparation process of the ferric ammonium citrate, the generation of hydrogen and the use of a strong oxidant in the traditional process are avoided, the safety of the production process is improved, the ferric ammonium citrate with few impurities and high purity is obtained, qualified diammonium hydrogen phosphate is co-produced, and the preparation process has a great application prospect.