633 results about "Platinum group" patented technology

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component, wherein the first PGM component comprises Rh and Pt; a second catalytic region comprising a second PGM component, wherein the second PGM component comprises Pd; and wherein the first PGM component has a Pt to Rh ratio of at least 1:20.

The invention relates to the field of recycling of solid waste resources. The invention particularly relates to a method for synergistically recovering failed lithium iron phosphate black powder and a failed platinum-containing catalyst. The invention discloses a method for synergistically recovering failed lithium iron phosphate black powder and a failed platinum-containing catalyst. The method comprises the following steps: A, vacuum reduction smelting; b, oxidizing and dissolving; c, carbon thermal reduction; and D, ammonium salt precipitation and calcination. The method for recovering the platinum group metal does not need to add a trapping agent, has the advantages of being high in resource utilization rate, good in economic benefit and short in process, and effectively reduces the influence of solid waste resources on the environment.

The invention provides a treatment method of copper-nickel concentrate rich in platinum group metals, which comprises the following steps: feeding the copper-nickel concentrate rich in platinum group metals and a first flux into a smelting furnace, and introducing first oxygen-enriched gas for smelting; copper matte and a second flux are continuously fed into a first converting furnace, and second oxygen-enriched gas is continuously introduced for first converting; raw copper and a third flux are fed into the oxygen inclined blowing rotary converter, and oxygen is introduced for second blowing; the crude copper is fed into an anode refining furnace, and air and a first reducing agent are introduced for fire refining; casting the copper liquid into an anode plate, and carrying out electrolytic refining on the anode plate; feeding the first converting slag, the second converting slag, a second reducing agent and a vulcanizing agent into a dilution electric furnace for slag dilution to obtain low-nickel matte and dilution slag; and the low-nickel matte is fed into a third converting furnace, air or oxygen-enriched air is introduced for third converting, and the problem that the recovery rate of nickel metal elements and platinum group metals in the copper-nickel concentrate rich in the platinum group metals is low is solved.

The invention discloses a semiconductor device structure, a preparation method thereof and a chip, and belongs to the technical field of semiconductor devices. The semiconductor device structure comprises a gold-silver alloy bump and a UBM layer, and the UBM layer is composed of a seed layer, a diffusion barrier layer and an adhesion layer or composed of the diffusion barrier layer and the adhesion layer. The diffusion barrier layer is composed of a platinum group element simple substance and / or an alloy containing a platinum group element, preferably composed of platinum, rhodium, iridium or an alloy thereof; the bottom of the gold-silver alloy bump is connected with the seed layer or the diffusion barrier layer, and the adhesion layer is connected with a chip electrode. By improving the UBM layer, the combination reliability of the gold-silver alloy bump and the UBM layer is improved, the obtained semiconductor device structure can pass a high-end chip reliability test, and a flip chip is prepared by replacing gold with gold-silver alloy.

Described herein are methods, devices, materials, and systems for extracting target materials from iron-rich feedstocks. The iron-rich feedstock may be red mud, a natural occurring mineral, and / or a waste stream. The target materials may include a main constituent of the feedstock, a rare earth element, a precious metal, and / or a platinum group element. The invention may use a combination of electrochemical reactions and physical separation methods.

The invention provides a method for synergistically recovering valuable elements from waste ternary lithium battery black powder and a spent automobile catalyst, and belongs to the technical field of solid waste recycling. The method comprises the following steps: mixing waste ternary lithium battery black powder, a spent automobile catalyst, coke and a slag former, and sequentially pelletizing and smelting to obtain lithium oxide-containing dust, PGMs-nickel cobalt manganese and smelting slag; carrying out magnetic separation on the smelting slag, and merging the secondarily enriched PGMs-nickel-cobalt-manganese alloy into the PGMs-nickel-cobalt-manganese alloy in the step (1); the PGMs-nickel cobalt manganese alloy, a hydrochloric acid solution and a sodium chlorate solution are mixed and then subjected to acidolysis, the obtained mixed solution is subjected to extraction, reverse extraction and precipitation, and recovery of platinum group metal, lithium and nickel cobalt manganese is achieved. The collaborative recovery method is adopted, the recovery rate of the platinum group metal is larger than or equal to 98%, the recovery rate of lithium is larger than 92%, the recovery rate of nickel-cobalt-manganese resources is larger than or equal to 90%, a new trapping agent does not need to be added in the platinum group metal trapping process, and valuable elements are fully applied.

Disclosed are an iron-based nanocrystalline soft magnetic alloy powder, a soft magnetic composite material, and a preparation method therefor. The atomic percentage molecular formula of the iron-based nanocrystalline soft magnetic alloy powder is: FeaBbCcSidCueMmQqZzXx, M being at least one of Co and Ni, Q being at least one of a pre-transition element, a semi-metal element, a rare earth element and Al, Z being at least one of Au, Ag and a platinum group metal element, X being at least one of O, N, S and a halogen element, 70≤a+m≤75, 8≤b≤18, 0≤c≤5, 10≤d≤15, 0≤m≤10, 1.3≤e≤2.5, 0≤q≤2, 0≤z≤1, 0≤x≤0.2, 22≤b+c+d≤30, and a+b+c+d+e+m+q+z+x=100. The soft magnetic composite material is composed of the described iron-based nanocrystalline soft magnetic alloy powder, an alloy-state soft magnetic powder, a binder and the like. The provided iron-based nanocrystalline soft magnetic alloy powder and soft magnetic composite material exhibit excellent soft magnetic performance, good processability and low cost.

The invention provides a high-molecular adsorption material with high selectivity on platinum group metals as well as a preparation method and application of the high-molecular adsorption material, and belongs to the technical field of material science. Comprising the following steps: (1) preparing a methanol solution containing platinum group metal ions, and adding a functional monomer mixture and modified graphene oxide to form a pre-assembled compound; (2) adding a cross-linking agent and an initiator, removing oxygen, and polymerizing to obtain a polymer; and (3) grinding the polymer, eluting metal ions, washing to be neutral, and drying. The high-molecular adsorption material provided by the invention takes modified graphene oxide as a support body, template molecules and specific functional monomers (4-vinylpyridine and 2-mercaptobenzimidazole) are combined to form a pre-assembled compound, then a cross-linking agent and an initiator are added, recognition sites are fixed through cross-linking polymerization, and finally, the high-molecular adsorption material is obtained after the template molecules are eluted. The adsorbent is high in adsorption rate, capable of specifically adsorbing platinum group metal, good in stability and reproducibility and capable of being repeatedly used.

The invention discloses a process and equipment for recovering platinum and palladium from a petroleum catalyst, and relates to the field of metal material recovery, carbon-supported platinum group noble metals platinum and palladium are recovered by using the patent technology, firstly, fine grinding, hydrolysis and filtration are performed, then a reducing agent is adopted for reduction, then acidification and filtration are performed to remove base metals, and hydrochloric acid and nitric acid solutions are adopted for leaching and saltpeter removal, so that the platinum and palladium are recovered. The high-purity palladium powder is prepared from the solution subjected to platinum precipitation through ammonium chloride platinum precipitation, ammonium chloroplatinate hydrazine hydrate reduction, high-purity platinum powder and ammonia water palladium precipitation and hydrazine hydrate reduction, the purposes of saving energy and reducing the production cost are achieved, the ashing roasting furnace is adopted for static ashing, the technology process is simplified, the platinum group precious metal recovery rate is high, and the smelting cost is low. And the quality and purity of the platinum-palladium product are high, the metal recovery rate is high, and the smelting cost is low.

Disclosed herein is a catalyst including a multicomponent alloy including a seed and al least four elements. The seed includes at least one platinum group metal, wherein the platinum group metal includes platinum, ruthenium, iridium, palladium, or rhodium. Methods of preparing the catalyst are also provided herein.

The embodiment of the invention provides a rock sample platinum group element separation and enrichment and high-precision determination method. The method comprises the following steps: weighing a rock geological sample, and dissolving the sample to obtain a platinum group element dissolving solution; the platinum group element dissolving solution is directly distilled to separate Os, and an Os absorption solution and a distillation residual solution containing Re and other platinum group elements are obtained respectively; redissolving the distillation residual liquid in 0.1 mol / L HCl to obtain a sample solution; adding the sample solution into a cationic resin column, and leaching, eluting and separating a matrix element, Re and other platinum group elements by using 0.1 mol / L HCl; redissolving the leachate in 0.1 mol / L HCl, adding an LN resin column, and leaching, eluting and separating residual interference elements, Re and other platinum group elements by using 0.1 mol / L HCl; and high-precision determination of Os, Re and other platinum group elements is realized. The method is easy to operate, the recovery rate of platinum group elements is high, and the removal rate of matrix elements and interference elements is high.

A high thermal conductive silicone composition including: (A) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups in one molecule and a kinematic viscosity at 25 C of 100 to 100,000 mm2 / s; (B) an aluminum powder having an average particle size of 50 μm or more; (C) a thermal conductive filler having an average particle size of 0.1 to less than 50 μm; (D) an organohydrogenpolysiloxane having two or more hydrogen atoms bonded to a silicon atom (Si—H groups) in one molecule; (E) a hydrolyzable organopolysiloxane represented by the following general formula (1); and (F) a platinum group metal catalyst having an effective amount. The high thermal conductive silicone composition can conform to the warpage of a substrate due to an increased material thickness and can maintain heat dissipation performance due to a high thermal conductivity.

The invention relates to the field of reforming catalyst preparation, and discloses a supported reforming catalyst, preparation and application thereof, and a catalytic reforming method. The invention relates to a supported reforming catalyst. The catalyst comprises an alumina carrier containing rare earth metal and IVA group metal, and an active component supported on the alumina carrier, the active component comprises a platinum group metal; wherein in the alumina carrier, pores with the pore diameter of 6-10 nm account for 10-22% of the total pore volume, pores with the pore diameter of 10-20 nm account for 50-75% of the total pore volume, and pores with the pore diameter of 20-50 nm account for 10-25% of the total pore volume. The supported reforming catalyst provided by the invention has excellent catalytic performance, is applied to the field of hydrocarbon catalytic reforming, and has relatively high reaction activity and product selectivity.

The present invention provides an exhaust gas purification catalyst in which platinum group metal migration from a catalyst layer to a base material during high temperature duration is suppressed. The exhaust gas purification catalyst disclosed herein includes a base material, a catalyst layer, and an intermediate layer arranged between the base material and the catalyst layer. The base material contains SiC. The catalyst layer contains a platinum group metal as a catalyst component. The intermediate layer contains substantially no platinum group metal. A product of a thickness of the intermediate layer (μm) and a specific surface area (m2 / g) of the intermediate layer is 1100 or more.

The invention provides a method for recovering platinum group metal from a waste automobile exhaust purification catalyst, and belongs to the field of precious metal recovery. The method comprises the following steps: carrying out crushing and impurity removal pretreatment on the waste catalyst to obtain solid residues; mixing the obtained solid slag with alkali liquor, and performing hot-pressing activation to obtain active slag; leaching the active slag by using an acid leaching system of hydrochloric acid-hydrogen peroxide-sodium chloride to obtain a leaching solution enriched with platinum group metals; adjusting the acidity of the leachate, adding a first adsorption material, selectively adsorbing platinum and palladium, and separating supernate and a platinum / palladium enrichment material; adjusting the acidity of the supernate, adding a second adsorption material, selectively adsorbing rhodium, carrying out solid-liquid separation, and collecting a rhodium enrichment material; respectively eluting and refining the platinum / palladium enrichment material and the rhodium enrichment material, and recovering platinum, palladium and rhodium; through the optimally designed recovery method of alkaline hot-pressing activation-mild acidic directional leaching-two-stage magnetic adsorption separation, efficient recovery of platinum, palladium and rhodium in the waste automobile exhaust catalyst is realized.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a high-dispersion platinum group noble metal-based catalyst, which comprises the following steps: preparing a porous rod-like cobaltosic oxide carrier material, cleaning with deionized water, drying, and roasting for 4-8 hours; dissolving chloroplatinic acid or platinum chloride in deionized water to form a noble metal solution; soaking the treated cobaltosic oxide carrier in a noble metal solution, taking out the carrier from the solution after soaking is completed, filtering, cleaning, drying, and roasting for 4-6 hours in an inert gas atmosphere; and keeping the temperature and reducing for 2-4 hours in a hydrogen atmosphere. When the porous rodlike cobaltosic oxide carrier material is prepared, firstly, a cobalt chloride solution is poured into the lower part of the double-layer cavity for stirring, a urea solution drips into the cavity through a spray head in the stirring process, a stirring barrel is turned over after stirring is completed, the stirred solution flows out and is filtered, the cobalt chloride solution and the urea solution are continuously added into the double-layer cavity for stirring and mixing, and the porous rodlike cobaltosic oxide carrier material is prepared. Therefore, the porous rod-like cobalt oxide solvent material is efficiently prepared.

The presented invention relates to a method of synthesis of carbon-supported platinum group metal or metal alloy nanoparticles, which comprises the following steps:adsorbing on carbon support complexes of a platinum group metal with a urea complexing agent selected from a group comprising urea, urea derivative, a mixture of urea with at least one urea derivative, and a mixture of at least two urea derivatives; andreducing the complexes adsorbed on the carbon support to metal nanoparticles, forming a product of carbon-supported metal nanoparticles.The invention also provides the use of the carbon-supported platinum group metal or metal alloy nanoparticles obtained by the method of the invention as catalyst.The present invention further relates to a method of adsorption of precursors of platinum group metals on the surface of a carbon support and use of complexes of platinum group metals with urea complexing agent for adsorption of platinum group metal precursors on carbon support.

The invention provides an electrolyzed water catalyst as well as a preparation method and application thereof. The electrolyzed water catalyst comprises graphene, MxSy and platinum group metal single atoms, and the preparation method comprises the following steps: firstly, carrying out hydrothermal reaction on raw materials of graphene and MxSy to obtain a first intermediate catalyst; and then coating a second solution containing the first intermediate catalyst on the surface of a substrate, performing plasma irradiation, and then treating by adopting a magnetron sputtering method and / or a chemical vapor deposition method to obtain the electrolyzed water catalyst. According to the invention, an MxSy composite structure is constructed on a graphene substrate, and plasma surface modification is supplemented, so that an environment rich in active defect sites is created; according to the present invention, the platinum group metal single atom can be accurately anchored through the magnetron sputtering method and / or the chemical vapor deposition method, such that the platinum group metal loading capacity is significantly reduced so as to reduce the cost, and the intrinsic activity and the stability of the water electrolysis catalyst are improved.

The invention relates to an environment-friendly platinum group noble metal slag analysis method which comprises the following steps: S1, sampling: sampling a sample to a cremation cup, and synchronously performing compensation analysis; s2, stirring: uniformly stirred reagents are added into the sample, the reagents comprise anhydrous sodium carbonate, borax, silicon dioxide, soluble starch, calcium fluoride, copper alloy and a covering agent, and a mixture is obtained; s3, melting is conducted, specifically, the mixture is completely melted and then poured into a casting mold to be cooled, and a copper buckle is formed; s4, acid dissolution: cleaning out the copper buckle in the cremation cup, dissolving the copper buckle in concentrated nitric acid, and filtering out residual metal slag; and S5, weighing: drying and weighing the metal slag, and calculating the content of the metal slag in the sample. The method belongs to a fire assaying treatment method and has the advantage of simple operation, but lead oxide is replaced by copper alloy, the toxicity of reagents is effectively reduced, and the treatment is more environment-friendly.

The invention discloses an ammoxidation catalyst and a preparation method and application thereof, the active component of the catalyst is represented by a general formula MoxBiaFebAcBdCeDfEgFhOy, A represents at least one element selected from the combination of a nickel element, a cobalt element, a manganese element, a zinc element and a cadmium element; b represents at least one element selected from the group consisting of magnesium, strontium and barium elements; c represents at least one element selected from a combination consisting of potassium, rubidium and cesium elements; d represents at least one element selected from the group consisting of a tungsten element, a vanadium element, a chromium element, a gallium element, a germanium element, a scandium element, an yttrium element, an indium element, a tin element, and an antimony element; e represents at least one element other than promethium element among lanthanide elements; f represents at least one element among platinum group elements. According to the present invention, the composition ratio of the active components of the catalyst is regulated according to the action mechanism of the metal catalyst, such that the comprehensive performance of the catalyst is improved, and the high trinitrile product yield and the low trinitrile yield material consumption are provided.

The invention relates to the field of recycling of rare and noble metal secondary resources. The invention particularly relates to a method for recovering platinum group metals and rare earth in a spent automobile three-way catalyst. The invention relates to a method for recovering platinum group metal and rare earth in a spent automobile three-way catalyst. The method comprises the following steps: A, crushing and fine grinding; b, uniformly mixing and briquetting; C, vacuum high-temperature smelting; d, fine crushing and magnetic separation; and E, acid leaching. The method has the advantages of simple process flow, high resource recovery rate, environmental protection and the like, and has wide industrial application prospects.

Platinum group metal containing chemical precursors suitable for vapor deposition are disclosed. Methods of using these precursors for Platinum depositions are also disclosed. The chemical precursors and methods are particularly suitable for depositing catalyst material on electrodes.

A stent comprising a cobalt-based alloy comprising at least 18 weight % cobalt (Co), 10-25 weight % chromium (Cr), 10-15 weight % tungsten (W), optionally, up to 2 weight % of manganese (Mn), optionally, up to 3 weight % iron (Fe), and 10-65 weight % of a metal member selected from a platinum group metal.

This fluoropolyether-based curable composition contains(A) a perfluoropolyether compound having two or more alkenyl groups per molecule,(B) a fluorine-containing organo hydrogen silane compound having two or more hydrosilyl groups having a specific structure,(C) a platinum group metal-based catalyst, and(D) a specific amount of at least one filler selected from organic resin powders and carbon black powders.Such a fluoropolyether-based curable composition can provide a cured product that has endurance against fluoric acid and electrolytic solutions for lithium ion batteries, has fine mechanical properties, and has excellent releasability because of not having uncured portions resulting from low compatibility between structural ingredients.

To provide a silicone release agent composition having lower odor than conventional one.SOLUTION: There is provided a silicone release agent composition which comprises (A) 83 to 99.5 pts.mass of a linear, branched or cyclic organopolysiloxane having at least two alkenyl group-containing organic groups in one molecule and 0.001 to 0.20 mol of an alkenyl group in 100 g of an organopolysiloxane, (B) a polyorganohydrogensiloxane having at least three SiH groups in one molecule in an amount such that the ratio of the number of moles of SiH groups in the component (B) to the number of moles of alkenyl groups in the component (A) is 0.6 to 20, (C) a platinum group metal-based catalyst in a catalytic amount, (D) 1 to 20000 pts.mass of at least one solvent selected from terpene and a terpene derivative based on 100 pts.mass of the total of the components (A), (B) and (C), and (E) 0.5 to 10 pts.mass of an addition reaction controlling agent based on 100 pts.mass of the total of the components (A), (B) and (C).SELECTED DRAWING: None

The invention discloses a low-density flame-retardant organic silicon foam composition, a silicon rubber foam material and a preparation method of the low-density flame-retardant organic silicon foam composition and the silicon rubber foam material, and the foam composition comprises the following components in parts by weight: (A) 100 parts of organopolysiloxane; (B) 5-100 parts of a reinforcing filler; (C) 20-100 parts of a composite flame-retardant filler; (D) 1-10 parts of a structuring control agent; (E) 1-10 parts of a foaming agent; (F) 1-10 parts of an auxiliary foaming agent; (G) 1-10 parts of hydrogen-containing siloxane; (H) 0.01-3 parts of a platinum group metal compound catalyst; (I) 0.01-1 part of an inhibitor; according to the organic silicon foam composition, the component (F) and the component (E) are introduced, so that the foaming speed and the curing speed can be better matched, the organic silicon foam composition has a relatively high foaming ratio after being cured, the density of a material can be remarkably reduced, and meanwhile, foam pores of foam are uniform and fine in size.

A method of manufacturing a catalyst intermediate is provided. The method comprises: providing a slurry comprising a hydrous oxide of one or more of aluminium, cerium and zirconium; and contacting the slurry comprising a hydrous oxide with platinum group metal (PGM) ions to provide a PGM-containing slurry.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a high-entropy alloy coating, a nickel-based interface cone with the high-entropy alloy coating and a preparation method. The high-entropy alloy plating layer comprises the following components: 15-20% of tantalum; 10-15% of tungsten; 14-20% of nickel; 3-8% of iron; 9-13% of molybdenum; the balance is one or more of ruthenium, platinum, zirconium and boron. The grain size of the high-entropy alloy coating is smaller than or equal to 5 micrometers, the density is larger than or equal to 99.8%, the thickness ranges from 0.1 mm to 0.6 mm, the surface roughness is smaller than 0.5 micrometer, and the heat conductivity is larger than or equal to 140 W / (m.K). The continuous working time of the nickel-based interface cone with the high-entropy alloy coating prepared by the invention under bombardment of 4000-8000K high-temperature plasma is greater than or equal to 80h, the nickel-based interface cone cannot be corroded and fall off in a working environment that the pH is less than or equal to 3 or greater than or equal to 9, and the impurity introduction amount is less than or equal to 5ppm. In addition, compared with a nickel-based interface cone with a platinum group metal coating, the nickel-based interface cone with the high-entropy alloy coating has the advantage that the manufacturing cost of the coating can be saved by 20%-30% more than that of the nickel-based interface cone with the platinum group metal coating.

The invention belongs to the technical field of precious metal recovery, and provides a method for efficiently recovering platinum group metal in a catalyst through photocatalysis and application thereof, and the method comprises the following steps: mixing a waste catalyst crushed material and metal powder, carrying out mechanochemical treatment, adding an acid solution, and reacting to obtain a modified waste catalyst; the modified waste catalyst and the leaching solution are mixed to obtain suspension liquid, then the suspension liquid is irradiated through ultraviolet-visible light for a photocatalytic reaction, filtering is conducted, and platinum group metal leaching liquid and leaching residues are obtained; and regulating the pH value of the platinum group metal leachate, adding an oxidizing agent, and extracting and separating the transition metal chloride by using an extracting agent to obtain the platinum group metal solution. According to the method, the platinum group metal particles are regulated and controlled while mechanical and chemical treatment activation is adopted, so that the platinum group metal particles generate the plasma resonance effect, strong redox active species generated by a photocatalyst under the illumination condition are converted into soluble compounds through complexation, and efficient leaching and recycling are achieved.

The invention provides a water-resistant RCO catalyst and a preparation method thereof.The preparation method of the water-resistant RCO catalyst comprises the following steps that tetrabutyl titanate, cerous nitrate, methyl laurate polyoxyethylene ether, acetic acid and ethyl alcohol are taken and mixed to be uniform, after heat treatment, drying and roasting are conducted, and titanium-cerium composite oxide microspheres are obtained; the preparation method comprises the following steps: taking titanium-cerium composite oxide microspheres, adding cerium nitrate, an organic ligand, N, N-dimethylformamide and 12-crown-4-ether into the titanium-cerium composite oxide microspheres, uniformly mixing, and reacting to obtain core-shell structure particles; and adding a platinum group metal precursor into the core-shell structure particles, and reacting to obtain the water-resistant RCO catalyst. The catalyst obtained by the invention has a good treatment effect on volatile organic compounds in flue gas, has good tolerance to salt-containing water vapor, is not easy to cause the problems of blockage of catalyst pores after crystallization of the salt-containing water vapor and the like, and can keep relatively high treatment efficiency for a long time.