29 results about "Zinc hydroxide" patented technology

The invention discloses a production method of a high-transparency and high-toughness BOPA (Biaxially Oriented Polyamide) film. The BOPA film is prepared from PA6T / 6I, a polyether-b-amide thermoplastic elastomer, POE (Polyolefin Elastomer), bis (tert-butylperoxyisopropyl) benzene, itaconic acid, zinc hydroxide, styrene and an antioxidant. The compatibility of the ITA-grafted POE is obviously improved, the tensile strength and the elongation at break of the blend are obviously improved, the toughening effect is effectively improved, the modified POE neutralized by the zinc hydroxide part not only can improve the compatibility between PA6T / 6I and POE, but also can reduce the influence of stable chemical bonds on the fluidity reduction of the blend, so that the toughness of the blend is improved. The later-stage processability of the blend is facilitated, and the product quality is improved; the polyether-b-amide thermoplastic elastomer, as a multi-block elastomer composed of a hard segment and a soft segment, can further improve the toughness of the blending material.

This invention belongs to the field of secondary utilization technology of metal resources, specifically relating to a method for treating waste liquid from electroplating zinc-nickel alloys. The method includes the following steps: S1, mixing the waste liquid from electroplating zinc-nickel alloys, oxygen, and a catalyst, and performing an oxidation reaction to obtain an intermediate liquid and nitrogen; the oxidation reaction temperature is ≥220℃; S2, adjusting the pH of the intermediate liquid to 13.0-13.5, performing a first filtration separation to obtain nickel hydroxide sludge and filtrate 1; S3, adjusting the pH of filtrate 1, performing a second filtration separation to obtain zinc hydroxide sludge and filtrate 2. This invention first degrades COD to obtain zinc and nickel ions; adjusting a specific pH value generates nickel hydroxide sludge, with zinc ions existing in the system as polyhydroxy zinc anions, achieving separation of nickel and zinc; further adjusting the pH separates zinc from the system as zinc hydroxide sludge precipitate. The operation is simple, with high separation efficiency and high purity.

This invention provides a one-dimensional silver nanostructure / metal hydroxide composite material, its preparation method, and its application. The preparation method includes: adding a one-dimensional silver nanostructure, a metal salt, and an additive to a solvent and stirring to disperse them evenly; adding an acidic or alkaline reagent under stirring conditions to adjust the pH of the solution, causing the metal ions in the solution to convert into metal hydroxide precipitates, obtaining a one-dimensional silver nanostructure-metal hydroxide suspension; then performing solid-liquid separation, washing and drying the obtained solid product to obtain a one-dimensional silver nanostructure / metal hydroxide composite powder; wherein the metal hydroxide is aluminum hydroxide, zinc hydroxide, magnesium hydroxide, iron hydroxide, manganese hydroxide, copper hydroxide, nickel hydroxide, or cobalt hydroxide, and the one-dimensional silver nanostructure is silver nanowire or silver nanoribbon. The resulting composite material uses metal hydroxide as a carrier and separator, inhibiting the drying and agglomeration of silver nanowires from the source, exhibiting high conductivity and good redispersibility, thus improving conductivity.

This utility model discloses a comprehensive treatment system for zinc-containing waste generated in viscose fiber production, belonging to the field of waste treatment in viscose fiber production. The system includes a reaction tank, filter press, pretreatment device, filter, ion exchange resin column, and acid bath preparation tank, ensuring a comprehensive treatment pathway for zinc-containing waste. This facilitates the mixing of highly acidic, high-salt zinc-containing wastewater with zinc-containing sludge. The strong acidity of the wastewater allows for the acid leaching of zinc sulfide and zinc hydroxide in the sludge, simultaneously obtaining a zinc sulfate solution and recovering sulfate to prepare sodium sulfate and sulfuric acid. This reduces the salinity of the wastewater, thereby decreasing the amount of reagents used in treating zinc-containing wastewater, mitigating scaling risks, and reducing the load on subsequent biochemical systems.

The present application relates to the technical field of hydrometallurgy, and discloses a method for preparing hydroxide from reverse copper-manganese solution, which comprises the following steps: controlling the potential of the reverse copper-manganese solution to carry out sulfidation copper deposition, so as to obtain a copper deposition solution; adjusting the pH of the copper deposition solution to 4-6, mixing the copper deposition solution with manganese powder to carry out manganese-zinc replacement, and obtaining zinc-manganese slag and a zinc deposition solution after sufficient reaction; mixing the zinc-manganese slag with sufficient zinc-dissolving alkali solution to carry out reaction, and obtaining manganese slag and the zinc-dissolving solution after solid-liquid separation; adjusting the pH of the zinc-dissolving solution to 7-8, and carrying out solid-liquid separation after sufficient reaction, so as to obtain zinc hydroxide. The method has a short overall process, good separation and purification effect, and can obtain crude manganese hydroxide and zinc hydroxide products.

The invention provides a method and system for removing zinc and extracting zinc from chlor-alkali coupled galvanized waste, and the method for removing zinc and extracting zinc from chlor-alkali coupled galvanized waste comprises the following steps: driving chlor-alkali equipment with green electricity, electrolyzing a sodium chloride solution to prepare hydrogen, chlorine and a sodium hydroxide solution, and synthesizing hydrochloric acid from the hydrogen and chlorine from the chlor-alkali equipment under a heating condition; pickling and soaking the zinc plating waste by using the synthesized hydrochloric acid to obtain a chloride solution and hydrogen; performing multiple-effect evaporation on the chloride solution to obtain a concentrated solution and diluted hydrochloric acid, and reusing the diluted hydrochloric acid for pickling and soaking; performing fractional precipitation on the concentrated solution by using a sodium hydroxide solution from chlor-alkali equipment, and separating zinc hydroxide precipitate and waste liquid; performing heat treatment on the separated zinc hydroxide precipitate to obtain zinc oxide; hydrogen generated by pickling and soaking is used for reducing zinc oxide hydrogen, and zinc metal with the purity larger than 99% is obtained; sodium chloride and sodium hydroxide in the waste liquid obtained through fractional precipitation are recycled, sodium chloride is recycled to chlor-alkali equipment, and sodium hydroxide is recycled to fractional precipitation.

This invention discloses a composite nano-zinc oxide material for the degradation of organic pollutants in water and its preparation method, belonging to the field of wastewater treatment agent preparation technology. A dispersion is obtained by mixing p-phenylenediamine, terephthalic acid, deionized water, and a mesoporous conditioner. An aqueous solution of zinc chloride is added to the dispersion, and the mixture reacts to obtain a porous polymer material. The porous polymer material is then impregnated in an alkaline solution to obtain zinc hydroxide@porous material. A mixed solution is obtained by mixing and dissolving ammonium molybdate, thiourea, and deionized water. The zinc hydroxide@porous material and the mixed solution are then subjected to a co-heating reaction and calcination to obtain the composite nano-zinc oxide material. This invention prepares a zinc hydroxide@porous material with a porous structure, and then reacts it with a molybdenum disulfide precursor solution to obtain a composite nano-zinc oxide material with good degradation effect on organic pollutants.

The invention discloses a preparation method of a polyfluorinated arylamine compound, and belongs to the technical field of chemical synthesis. The method comprises the following steps: by taking polyfluoroaryl zinc carboxylate as a raw material or a reaction system consisting of polyfluoroaryl carboxylic acid and zinc hydroxide as a raw material, mixing the raw material with an O-benzoyl hydroxylamine compound, and reacting in a solvent at 40-100 DEG C for 8-14 hours under the synergistic effect of a copper-based catalyst and a bipyridine / phenanthroline ligand, the polyfluorinated arylamine compound is efficiently prepared through decarboxylation and C-N coupling reaction. The process does not need strong base and harsh anhydrous and anaerobic conditions, can be compatible with substrates containing various substituent groups such as bromine, phenyl, methoxyl and the like, has the target product yield of 54-82%, has the advantages of wide substrate universality, mild reaction conditions, simplicity and convenience in operation, controllable cost and the like, and provides an efficient and feasible solution for large-scale production in the fields of medicines and materials.

Alkaline electrochemical cells are provided, wherein methods to decrease or eliminate shorting in batteries by preventing zinc oxide reaction precipitate from creating a conductive bridge between the two electrodes. The alkaline electrochemical cell comprises solid zinc oxide particles in the anode and dissolved zinc oxide or zinc hydroxide in one or more of the catholyte, the anolyte, and the free electrolyte. Optimally, the solid zinc oxide particles have a large Brunauer, Emmett, and Teller (BET) surface area and / or a large median particle size (D50). The cells may also comprise a certain amount of surfactant in the separator.

The invention discloses an amino acid-zinc complex catalyst as well as preparation and application thereof in PET (Polyethylene Terephthalate) degradation. The amino acid-zinc complex catalyst is formed by complexing nitrogen-terminal protected amino acid and zinc oxide or zinc hydroxide. Carbonyl groups in PET molecules can be effectively activated through a complex structure formed by amino acid and zinc, breakage of C-O bonds is promoted, and efficient degradation is achieved under relatively mild conditions.

A personal care composition may include a water-soluble zinc hydroxychloride having a chemical formula Zn(OH)2-xClx, where x is from 0.67 to 1.89. The personal care composition may further include glycine. The personal care composition may be an antiperspirant or a deodorant. The water-soluble zinc hydroxychloride may be made by a method including reacting zinc chloride with a base to form a reaction product comprising the water-soluble zinc hydroxychloride. The water-soluble zinc hydroxychloride may also be made by a method including reacting zinc oxide or a water-insoluble zinc hydroxide with an acid to form a reaction product comprising the water-soluble zinc hydroxychloride.

This invention provides an alkaline electrochemical battery, wherein at least the free electrolyte solution contains dissolved zinc oxide or zinc hydroxide, and / or the anode contains solid zinc oxide or zinc hydroxide to slow down the formation of a zinc oxide passivation layer on the zinc electrode. Furthermore, this invention also provides a method for preparing the alkaline electrochemical battery.

The application discloses a preparation method of a nano zinc oxide / graphene composite photocatalyst based on vapor deposition, and particularly relates to the following steps: S1, preparation of a precursor solution; S2, placing the precursor solution obtained in the step S1 into a thermostat for heat treatment; S3, soaking and washing the wet gel obtained in the step S2 with distilled water; S4, placing the wet gel after soaking and washing into a freeze dryer for rapid freezing and vacuum drying; S5, preparation of a zinc hydroxide aqueous solution; S6, vacuum filtration of the zinc hydroxide aqueous solution; S7, heat treatment of the zinc hydroxide powder obtained in the step S6 to obtain zinc oxide powder; S8, crushing the graphene aerogel obtained in the step S4; and S9, preparation of the nano zinc oxide / graphene composite photocatalyst. The photocatalyst prepared by the method has greatly improved degradation efficiency of organic dyes compared with nano zinc oxide. The application also discloses the nano zinc oxide / graphene composite photocatalyst based on vapor deposition.

The present invention provides a novel and efficient method for recovering manganese and producing manganese dioxide from hot cake wastes of zinc production industries. In this process, the waste is first subjected to three stages of leaching with sulfuric acid to extract zinc from it. Then, the leaching solution is separated by filtration and by adding lime water, zinc hydroxide precipitate is obtained. These precipitates are used for the next stage, i.e., modified leaching. In the next step, using ferrous sulfate and sulfuric acid, the conditions for manganese extraction are optimized and the purification process is carried out by removing impurities such as iron, nickel and cadmium. Finally, manganese dioxide is produced with high purity using ammonium persulfate as an oxidant. This method is applicable as an economical and sustainable solution for the metal recycling industry by increasing extraction efficiency, reducing costs and reducing environmental impacts.

Provided is a zinc-based desulfurizing agent having excellent desulfurizing performance at around room temperature. This method for producing the zinc-based desulfurizing agent comprises: a neutralization step for neutralizing a zinc ion-containing aqueous solution to precipitate a zinc component; a solid-liquid separation step for subjecting the precipitated zinc component to solid-liquid separation to obtain a zinc hydroxide-containing dehydrated cake; and a drying step for drying the zinc hydroxide-containing dehydrated cake at a temperature equal to or lower than the decomposition temperature of zinc hydroxide to obtain a zinc hydroxide-containing solid.

The invention discloses high-purity oligopeptide chelated zinc and a preparation method thereof, and the preparation method comprises the following steps: S1, adding an acidic isopropanol aqueous solution into sunflower seed meal powder, and carrying out heating treatment to obtain purified sunflower seed meal; s2, dispersing the purified sunflower seed meal into water under an acidic condition, and treating with a colloid mill to obtain a sunflower seed meal-water mixture; s3, adding compound protease into the sunflower seed meal-water mixture to carry out enzymolysis, carrying out solid-liquid separation, and carrying out ultrafiltration, so as to obtain ultrafiltration permeate liquid; s4, adding zinc hydroxide into the ultrafiltration permeate, and heating to obtain an oligopeptide chelated zinc solid; and S5, adding low-carbon alcohol into the oligopeptide chelated zinc solid, and heating to obtain the high-purity oligopeptide chelated zinc. According to the preparation method, through adjustment of working procedures and selection of raw materials, components in the sunflower seed meal powder are treated in sequence, no additional salt is introduced, and the obtained oligopeptide chelated zinc has the characteristics of being high in sanitary safety, white in color, high in purity and yield and free of oxidation and discoloration of a product.

Provided are: a polyarylene sulfide resin composition in which the generation and contamination of colored foreign matter are suppressed; a method for producing the same; and a molded product. Also provided is a method for suppressing colored foreign matter in a polyarylene sulfide resin composition.　The polyarylene sulfide resin composition comprises: 100 parts by mass of a polyarylene sulfide resin (A); and 0.03-5 parts by mass of a colored foreign matter inhibitor (B) including at least one selected from the group consisting of zinc hydroxide, zinc acetate, zinc oxide, zinc carbonate and basic zinc carbonate.

The invention discloses a flame-retardant PVC film and a preparation method thereof, and relates to the field of film materials. When the flame-retardant PVC film is prepared, 4 '-vinyl-[1, 1'-biphenyl]-4-alcohol and phosphorus trichloride are subjected to a reaction, and phosphite ester is prepared; the preparation method comprises the following steps: sequentially reacting nano silicon dioxide with trimethoxysilane and phosphite ester to prepare modified silicon dioxide; the preparation method comprises the following steps: reacting polyvinyl chloride with 3-hydroxy-4-pentenoic acid and then with calcium hydroxide and zinc hydroxide to prepare modified polyvinyl chloride; aCR-Z30, the modified polyvinyl chloride and the modified silicon dioxide are mixed, a film is prepared, polyethylene glycol methacrylate is polymerized on the surface of the film, and the flame-retardant PVC film is prepared. The flame-retardant PVC film prepared by the invention has aging resistance, hydrophilicity and self-repairing capability.

The application belongs to the technical field of zinc acetylsalicylate preparation, and discloses a one-pot synthesis method of zinc acetylsalicylate. (1) A mixed solvent is prepared by taking 55-65 parts of ethanol, 5-9 parts of acetic acid and the rest of water, with the total volume being 100 parts; (2) under the condition of condensation reflux, the mixed solvent is stirred and heated to 45-60 DEG C, acetylsalicylic acid is added, and then zinc hydroxide is added after the acetylsalicylic acid is completely dissolved, and the stirring and heating is continued to 75-90 DEG C for 0.2-2 h; wherein, the molar ratio of zinc hydroxide to acetylsalicylic acid is 1: (2-2.2) ; 80-100 mL of the mixed solvent is added for every 0.0555 mol of acetylsalicylic acid; (3) after the reaction is completed, the reaction liquid is concentrated to 1 / 4-1 / 3 of the original volume, naturally cooled to room temperature, then stored at 2-4 DEG C for 12-24 h, evaporated at 45-60 DEG C, and then vacuum dried, and the zinc acetylsalicylate is obtained. The synthesis method is a one-pot method, the process is simple, the reaction time is short, and the method is suitable for industrial production, and the obtained product has high yield and high purity.

A method has now been found for the preparation of calcium, magnesium, and zinc salts of sugar acids, this being the object of the present invention, which is characterized in that the method may include providing a sugar and oxidizing the sugar to a sugar acid in the presence of a noble metal catalyst, oxygen, and a heterogeneous hydroxide source. Preferably the oxidation is carried out with a gold catalyst, and a heterogeneous source of magnesium, calcium, or zinc hydroxide. The oxidation can be performed in a batch or continuous manner.

The invention belongs to the technical field of nuclear fuel circulation and hydrometallurgy, and provides a uranium enrichment method which comprises the steps that uranium-containing raw materials are subjected to acid leaching, and uranium-containing leachate is obtained; and metal zinc is added into the uranium-containing leachate, the metal zinc and acid are stirred to react until the pH value of the solution is larger than or equal to 6.5, zinc hydroxide colloid is generated in situ, uranium is adsorbed, and uranium-rich zinc hydroxide is obtained. According to the method, high-activity zinc hydroxide colloid is generated in situ by using metal zinc, uranyl ions can be specifically adsorbed through surface complexation, and therefore efficient selective fixing of uranium is achieved. The enrichment method has the advantages of high adsorption capacity, excellent selectivity under the interference of coexisting ions, good chemical stability, simple separation and recovery, stable recycling performance and the like, and the preparation process is simple, the cost is controllable, and large-scale production is easy.

The present disclosure relates to a filtration system for an air purification apparatus for removing volatile organic sulfur compounds (VOSCs) from indoor air at room temperature, comprising a filter element comprising particles and / or pellets made from two zinc compounds, zinc hydroxide (Zn (OH) 2) and zinc peroxide (ZnO2), and wherein the filter acts as an absorption filter that irreversibly reacts with volatile organic sulfur compounds that may contaminate the indoor air, the volatile organosulfur compounds include vapors of liquid organic mercaptans (RSH), vapors of liquid dialkyl oligosulfides (RS-SR and RS-S-SR, including those present in allium species), and vapors of solvent carbon disulfide (CS2). The present disclosure also relates to a method of removing these volatile organosulfur compounds from indoor air in which a controlled indoor air flow is passed through a filtration system comprising particles or pellets prepared from zinc hydroxide (Zn (OH) 2) and zinc peroxide (ZnO2), and wherein the volatile organosulfur compound reacts irreversibly with the hydroxide and peroxide ions of the aggregate (pellets or granules) to produce solid harmless zinc salts to be trapped in the filtration system.

The application discloses a preparation method of calcium-doped high-hydrated zinc-iron spinel monocrystal under high temperature and high pressure, and the method comprises the following steps: preparing a cylindrical zinc-iron spinel sample by taking solid-state basic zinc carbonate inorganic compound powder, solid-state transparent red-brown flaky iron (III) citrate crystals, solid-state oxalic acid powder, solid-state calcium stearate powder, solid-state zinc hydroxide powder, solid-state slaked lime powder and liquid dilute nitric acid as starting raw materials; preparing water source pieces by taking zinc hydroxide powder and slaked lime powder with a weight ratio of 4:1 as water sources; and performing high-temperature and high-pressure reaction on the cylindrical zinc-iron spinel sample and two water source pieces which are sequentially sealed in an inner sleeve-graphite tube to obtain high-hydrated zinc-iron spinel monocrystal. The method completely solves the blank of the preparation technology of calcium-doped high-hydrated zinc-iron spinel large-granular monocrystal under the current high-temperature and high-pressure conditions, so as to obtain experimental samples of calcium-doped high-hydrated zinc-iron spinel large-granular monocrystal.

This invention relates to a conductive, room-temperature stable, one-component (1K) epoxy adhesive composition comprising: a) an epoxy resin; b) at least one ionic component as a catalyst for epoxy homopolymerization; c) conductive particles; and d) inorganic particles selected from barium sulfate (BaSO4), magnesium hydroxide (Mg(OH)2), aluminum hydroxide (Al(OH)3), zinc oxide (ZnO), zinc hydroxide (Zn(OH)2), titanium dioxide (TiO2), iron oxides, and mixtures thereof.

The application discloses a large-area gas separation membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The technical scheme is characterized by comprising the following preparation steps: S1, dissolving zinc nitrate in a solvent, then adding sodium hydroxide alcohol solution, and reacting under ultrasonic conditions to obtain a zinc hydroxide solution, wherein the molar ratio of the zinc nitrate to the sodium hydroxide is 1:2; S2, then adding a solvent in which terephthalic acid is dissolved, performing ultrasonic reaction for 1-2 hours, then performing suction filtration on the reaction solution to separate white precipitates, washing the white precipitates with ethanol for multiple times, and then vacuum drying to obtain a filler; S3, adding the filler obtained in the step S2 into a solvent, uniformly dispersing the filler, then adding polyimide, uniformly stirring the polyimide to obtain a dispersion liquid, pouring the dispersion liquid into a watch glass, heating at 50-60 DEG C, evaporating the solvent to obtain a thin film, and then vacuum drying the thin film to obtain a gas separation membrane, wherein the addition amount of the filler is 3-6% of the mass of the polyimide, so that the efficiency of carbon dioxide separation is improved.

The invention discloses a preparation method of a zinc pyruvate product. The preparation method comprises the following steps: 1, fully reacting excessive zinc hydroxide with a pyruvic acid feed liquid to obtain a reaction liquid a; 2, controlling the temperature and pH level of the reaction liquid a, and filtering to obtain a precipitate a mixed by zinc hydroxide and zinc pyruvate; and step 3, dropwise adding an ammonium chloride solution into the precipitate a, dissolving excessive zinc hydroxide, filtering to obtain a precipitate b and a filtrate b, and drying the precipitate b to obtain zinc pyruvate. No organic solvent is introduced in the preparation process, the process is simple, operation is convenient, and the generated zinc pyruvate is high in purity, good in fluidity and suitable for industrial production.

This invention belongs to the field of lithium-ion battery material technology and discloses a precursor for a lithium-ion battery cathode material. The core of the precursor is a nickel-cobalt-manganese hydroxide, and the outer layer is a multilayer structure formed by alternating layers of lanthanum-aluminum-iron-chromium-magnesium-zinc hydroxide and nickel-cobalt-manganese hydroxide, with the innermost and outermost layers of the multilayer structure being lanthanum-aluminum-iron-chromium-magnesium-zinc hydroxide. Furthermore, this invention discloses a co-precipitation method for preparing the above-mentioned precursor. Lanthanum-aluminum-iron-chromium-magnesium-zinc hydroxide is coated onto the surface of the nickel-cobalt-manganese hydroxide, and this coating serves as a repeating component unit to form the precursor. After lithium-ion mixing and sintering, the lanthanum-aluminum-iron-chromium-magnesium-zinc hydroxide is converted into high-entropy oxides, which can accelerate lithium-ion transport. Moreover, the spacing of the high-entropy oxides can effectively suppress the cracking of secondary particles, hinder side reactions between the electrode and electrolyte, promote cathode-electrolyte interface kinetics, and improve electrochemical performance.

The invention relates to a method for preparing durable anti-ultraviolet fabric by adopting tannic acid / nano-zinc oxide composite functional finishing, which comprises the following steps: step 1, sequentially adding tannic acid and a sodium hydroxide solution into a zinc chloride solution in a stirring state to prepare a tannic acid and zinc hydroxide composite finishing solution, the molar ratio of the added zinc chloride, sodium hydroxide and tannic acid is 50: 100: (1-4), putting the linen fabric into the tannic acid and zinc hydroxide composite finishing liquid for finishing, and then taking out and drying the linen fabric. And 2, soaking the fabric finished in the step 1 in a tannic acid solution (the pH value is 7.5-12) at room temperature, taking out and drying. The modification method provided by the invention can effectively improve the ultraviolet resistance and washing resistance of the finished fabric.

The application discloses an imidazole boron skeleton material, a preparation method and application thereof, and belongs to the technical field of nanoporous materials. The imidazole boron skeleton material is obtained by coordination and assembly of metal zinc ions and tri-imidazole boron hydride compounds, and free anions of the imidazole boron skeleton material are Cl ‑ or OH ‑ The preparation method is as follows: zinc chloride or zinc hydroxide, tri-imidazole boron hydride compounds, 2-imidazole ketone and trimesic acid are dissolved in a solvent, and a solid product is obtained by reaction at 70-90 DEG C, and then the solid product is activated in vacuum, and the imidazole boron skeleton material is obtained. The imidazole boron skeleton material has a high adsorption amount ratio of ethyne and carbon dioxide, and shows high adsorption selectivity, and the synthesis raw material is easy to obtain, the preparation process is simple, and the cost is low, and the imidazole boron skeleton material has a good application prospect in the field of separation of ethyne and carbon dioxide mixed gas.