364 results about "Zinc metal" patented technology

A catalyst for hydrogenated synthesis of glycol with oxalate and a preparation method for the catalyst belong to the glycol preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and zinc as the promoter, and is manufactured with the method of deposition. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of zinc metal is 0.1 to 15 percent of the carrier weight, and the optimal content of zinc metal is 1 to 8.0 percent. The select specific surface area of the carrier is 90-350m²/g, and the optimal is 150-300m²/g. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.

A zinc ion-exchanging battery device comprising: (A) a cathode comprising two cathode active materials (a zinc ion intercalation compound and a surface-mediating material); (B) an anode containing zinc metal or zinc alloy; (C) a porous separator disposed between the cathode and the anode; and (D) an electrolyte containing zinc ions that are exchanged between the cathode and the anode during battery charge/discharge. The zinc ion intercalation compound is selected from chemically treated carbon or graphite material having an expanded inter-graphene spacing d₀₀₂ of at least 0.5 nm, or an oxide, carbide, dichalcogenide, trichalcogenide, sulfide, selenide, or telluride of niobium, zirconium, molybdenum, hafnium, tantalum, tungsten, titanium, vanadium, chromium, cobalt, manganese, iron, nickel, or a combination thereof. The surface-mediating material contains exfoliated graphite or multiple single-layer sheets or multi-layer platelets of a graphene material.

A process and device are disclosed for precipitating solid compounds from the liquid zinc or liquid zinc-based alloys of a metal bath. According to the disclosed process, partial amounts of the metal phase containing the compound(s) are exposed to an acceleration higher than the acceleration due to gravity and at least partially dissociated thereby into fractions containing heavier and/or lighter components. The molten mass depleted of solid compounds is returned to the metal bath and the part of the molten mass enriched with the desired compounds is discharged. The disclosed device is substantially characterized in that a hollow rotary body (2) is introduced into the molten mass (1). The hollow rotary body (2) can be driven about an axis and is fitted in the submerged or lower area with conveyor means (21) which project into the cavity. In its discharge or upper area, the hollow rotary body (2) is provided with at least one discharge opening (23) for the depleted molten mass (14) eccentrically arranged in its wall and with at least one further discharge opening (25) for the liquid metal enriched with the desired compounds centrally arranged and/or eccentrically arranged on the discharge side. At least one of the upper molten mass discharge openings (23, 24) in the rotary body (2) opens into a discharge area of a housing (3) which at least partially surrounds the rotary body (2).

The present invention is a polymeric resin composition having improved toughness, suitable for use in transparent glazing, comprising an at least partially neutralized ethylene acid copolymer metal carboxylate resin, wherein the metal carboxylate consists essentially of zinc metal counter-ions.

A process for the recovery of zinc metal from a zinc mineral includes the steps of leaching the zinc mineral in a solution including a halide species formed from two or more different halides, to leach the zinc into the solution. The zinc-bearing solution is then electrolysed to yield zinc metal and to generate the halide species. The electrolysed solution including the halide species is then returned to the leaching step. A portion of the electrolysed solution can be removed as a bleed stream from a cathode compartment of an electrolytic cell of the electrolysis process and processed to remove manganese as manganese dioxide precipitate by adding thereto limestone, and the halide species from an anode compartment of the electrolysis process. In this regard, the pH and Eh of the solution can regulated in a manner that favours the formation of the manganese dioxide precipitate over the formation of a precipitate of zinc.

Active material for a negative electrode of a rechargeable zinc alkaline electrochemical cell is made with zinc metal particles coated with tin and/or lead. The zinc particles may be coated by adding lead and tin salts to a slurry containing zinc particles, a thickening agent and water. The remaining zinc electrode constituents such as zinc oxide (ZnO), bismuth oxide (Bi₂O₃), a dispersing agent, and a binding agent such as Teflon are then added. The resulting slurry/paste has a stable viscosity and is easy to work with during manufacture of the zinc electrode. Further, the zinc electrode is much less prone to gassing when cobalt is present in the electrolyte. Cells manufactured from electrodes produced in accordance with this invention exhibit much less hydrogen gassing, by as much as 60-80%, than conventional cells. The cycle life and shelf life of the cells is also enhanced, as the zinc conductive matrix remains intact and shelf discharge is reduced.

The process uses hydrochloric acid solutions to extract zinc from electric arc furnace dusts containing zinc oxide and zinc ferrite. To selectively leach zinc and minimize iron dissolution by precipitating as FeO.OH and Fe2O3, hot acid leaching with the aqueous solution containing 37 g/l-74 g/l HCl and 104 g/l-270 g/l ZnCl2 is used. New dust is introduced to remove iron from the filtrate of the hot acid leaching. The zinc chloride solutions purified by activated carbon and metallic zinc powder is electrolysed in electrowinning cells which had cation exchange membrane to produce high purity zinc metal and to regenerate hydrochloric acid. Electrolysing an aqueous solution of zinc chloride with Zn concentration of 50-130 g/litre below 40° C. in a cell divided by cation exchange membrane, whereby coherent zinc is yielded at the cathode with high current efficiency of exceeding 90%. HCl is directly regenerated with a very small loss below 2% and low energy consumption below 5.0 kWh/kg-Zn during Zn-electrodeposition at a cathodic current density in the range of 300-2000 A/m2, and a membrane current density in the range of 750-2000 A/m2. The spent electrolyte with 1-2N HCl is used to leach the residue in the hot acid leaching vessel.

The invention relates to an efficient multilayer composite electrode wire, which comprises a core part and a wrapper wrapped on the core part. The electrode wire is characterized in that: the core part is provided with a brass wire core formed by performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment on a brass core wire, and the metallographic structure of the brass wire core is mainly an alpha-phase structure; and the wrapper is a diffused alloy layer formed by performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment on a copper metal coating and a zinc metal coating which are sequentially plated on the brass core wire, and the metallographic structure of the diffused alloy layer is mainly a beta-phase structure. The electrode wire is prepared by the following steps of: plating the copper and zinc metal coatings on the core wire, then performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment, drawing, and thus obtaining the electrode wire. Compared with the prior art, the invention has the advantages that: the cutting efficiency of the efficient multilayer composite electrode wire is remarkably higher than that of a common galvanized wire, the comprehensive cutting cost of the efficient multilayer composite electrode wire is lower than that of the common galvanized wire, and the efficient multilayer composite electrode wire has good universality.

The present invention relates to smelting technology and is wet smelting process of producing high purity zinc metal from zinc oxide ore. The technological process includes the steps of: leaching zinc oxide ore with alkali solution; adding sulfide separating agent into filtrate after leaching; filtering to separate lead-containing filtered residue and electrolyzing the filtrate to produce zinc.The present invention has simple technological process, low production cost, high in zinc leaching out rate, reuse of waste liquid and low alkali loss.

The invention provides a process for smelting zinc with a wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling at two stages, belonging to the technical field of non-ferrous metal smelting. The process comprises the following steps of neutral leaching, acid leaching at the first stage, acid leaching at the second stage, pre-neutralizing, settling vitriol and pickling to obtain zinc metal with a high recovery rate. The total recovery rate of zinc metal is 94.45%. The loss of valuable metal in iron vitriol slag is less, the recovery rate of metal is high, and the pollution of vitriol slag to the environment is improved.

Coatings containing particulate metal alloy are disclosed. The coatings provide corrosion protection to a substrate, such as a metal substrate. The coatings contain zinc-metal-containing alloy in flake form, most particularly an alloy flake of zinc and aluminum. The coating can be from compositions that are water-based or solvent-based. The compositions for providing the coating may also contain a substituent such as a water-reducible organofunctional silane, or a hexavalent-chromium-providing substance, or a titanate polymer, or a silica substance constituent. The coating may desirably be topcoated.

An article having a continuous network of zinc and a continuous network of void space interpenetrating the zinc network. The zinc network is a fused, monolithic structure. A method of: providing an emulsion having a zinc powder and a liquid phase; drying the emulsion to form a sponge; annealing and/or sintering the sponge to form an annealed and/or sintered sponge; heating the annealed and/or sintered sponge in an oxidizing atmosphere to form an oxidized sponge having zinc oxide on the surface of the oxidized sponge; and electrochemically reducing the zinc oxide to form a zinc metal sponge.

The invention relates to a manufacturing method of a fractured rock core, which comprises the steps of manufacturing a mould of the core, sand, clay, aluminium phosphate and a zinc sheet. The method is characterized in that the sand, clay and aluminium phosphate with the weight ration of 50 to 80 : 10 to 40 : 10 to 30 are mixed together, stirred evenly and put into a cylindrical or rectangular mould; then the zinc sheet simulating the fracture strike, shape, width and thickness of the core is put into the simulation position in the mould which is then placed on a pressing machine for shaping at the pressure of 1 to 50MPa by pressing; the sheet is placed in a high temperature furnace for baking after demoulding, the vapourizing temperature of the zinc metal sheet is reached when the temperature is more than 910 DEG C which is maintained for more than 10min; then the furnace is shut down till the zinc sheet is completely vaporized into gas; and when the temperature drops, the fractured rock core is taken out and manufactured.

The invention provides metal protective coating. The metal protective coating is obtained by uniformly mixing raw material mixture, wherein the raw material mixture contains water soluble silicate, a promoter, a silane coupling agent, silicon oxide filler, water soluble film forming resin and water; the promoter is at least one of pyrrolidone, N-methyl pyrrolidone, and N-ethyl pyrrolidone; and the silane coupling agent contains first silane derivatives shown in formula (1) described in the specification, wherein R1, R2 and R3 are methoxyl or ethoxyl respectively, and n is an integral number ranging from 1 to 4. The invention also provides a hot galvanizing metal material and a hot-dip aluminium-zinc metal material. A protective film formed by the metal protective coating provided by the invention has excellent corrosion resistance, water resistance, heat resistance and fingerprint resistance. Formula (1) is described in the specification.

The invention provides a method for separating iron, chromium, nickel, copper and zinc from high-iron high-chromium electroplating sludge leachate. The method comprises the following steps: (1) addingiron powder into the leachate to obtain a copper powder product and replaced liquid; 2) adding iron powder into the replaced liquid to obtain reduced liquid; (3) adding a chromium precipitating agentinto the reduced liquid, and carrying out filtering to obtain chromium-precipitated liquid and a chromium precipitate; (4) adding the activator antimony salt and zinc dust into the chromium-precipitated liquid, carrying out a reaction, and then carrying out filtering to obtain nickel powder and nickel-removed liquid; (5) adding an acidic phosphate extraction agent into the nickel-removed liquid to extract zinc, then carrying out reextraction by using dilute sulfuric acid, subjecting a zinc-rich solution to concentration and crystallization to prepare a zinc salt product, and subjecting zinc raffinate to subsequent treatment; and (6) subjecting the zinc raffinate to concentration and crystallization to prepare ferrous sulfate heptahydrate, and returning distilled water for leaching. The separation method of the invention has the advantages of short process and high efficiency, and can effectively solve the problem difficulties in separate separation of chromium, iron, nickel, copper and zinc metals in the high-iron high-chromium electroplating sludge leachate.

The invention provides a method for recycling gallium, indium and germanium from wasted thin-film solar cells. The method includes the steps: obtaining first separation liquid containing metal ions of the gallium, the indium, the germanium, cadmium, copper, tin and zinc; obtaining second separation liquid; obtaining filter residues containing the gallium, the indium, the germanium and the tin; obtaining fourth separation liquid and an indium and germanium metal solid which is not dissolved in a lye solution; conducting the steps of recycling gallium metal; conducting the steps of recycling indium metal; and conducting the steps of recycling germanium metal. According to the method for recycling the gallium, the indium and the germanium from the wasted thin-film solar cells, various dissipated metal such as the gallium, the indium and the germanium can be respectively recycled step by step, recycling cost can be effectively reduced, the recycling efficiency is improved, and the method is simple in process and is suitable for industrial production. In addition, through the method for recycling the gallium, the indium and the germanium from the wasted thin-film solar cells, the various dissipated metal such as the gallium, the indium and the germanium is high in purity, and the purity can reach up to 99.99%.

The invention provides a preparation method of an organic framework material containing zinc metal. The method comprises steps as follows: porphyrin, (4-carboxyphenyl)benzene, zinc nitrate and N,N-dimethylformamide are mixed under the ultrasonic condition, and a mixed solution is obtained; the mixed solution is subjected to a hydrothermal reaction, and the organic framework material containing zinc metal is obtained. The organic framework material containing zinc metal is prepared from raw materials including porphyrin, (4-carboxyphenyl)benzene and zinc nitrate, the preparation method is simple, few steps are used, fluorescent signals of the organic framework material containing zinc metal can be quenched by parathion-methyl, the fluorescence quenching degree is linearly correlated with logarithms of the content of parathion-methyl, the organic framework material containing zinc metal is used for detecting parathion-methyl, so that parathion-methyl can be rapidly, simply and sensitively detected.