32 results about "Sodium chloroplatinate" patented technology

The invention discloses an electroplating process capable of improving surface smoothness of a pressure-equalized electrode probe of a high-voltage direct-current converter valve. The pretreated pressure-equalized electrode probe is put in an electroplating liquid for platinum plating treatment, the electroplating liquid is prepared from ingredients as follows: 0.001-6 mol / L of sodium tetrachloroplatinate or sodium chloroplatinate, 0.1-10 mol / L of ethylenediamine tetraacetic acid disodium salt or ethylenediamine tetraacetic acid tetrasodium salt; the pressure-equalized electrode probe serves as a work electrode, an annular platinum sheet serves as a counter electrode, and the pressure-equalized electrode probe is placed in the middle of the annular platinum sheet; the temperature of the electroplating liquid is 5-75 DEG C, the pH value of the electroplating liquid is 6-7.5, the electroplating current is 0.01-10 mA / cm<2>, and the plating layer on the surface of the pressure-equalized electrode probe is 0.1-5 mu m. The electroplating process is simple and easy to control, the activity of platinum ions and the diffusion coefficient of the platinum ions in the electroplating liquid are limited, so that the reduction reaction speed of platinum is controlled, and the surface smoothness of a platinum deposition layer is further controlled to reach the mirror surface.

The invention belongs to the technical field of recycling of precious metal, and particularly relates to a method for preparing a Pt / C catalyst from a platinum-containing waste catalyst. The method comprises the following steps: roasting, oxidizing and filtering the platinum-containing waste catalyst to obtain a coarse chloroplatinic acid solution; then extracting and reversely extracting to obtain a sodium chloroplatinate solution; and finally mixing the sodium chloroplatinate solution with a carbon black carrier and reducing, filtering and drying to obtain the Pt / C catalyst. The Pt / C catalyst prepared by the method is good in dispersity and high in stability, high-valued reusing of the platinum-containing waste catalyst is realized, the process is simple, and industrialized application is facilitated.

The invention discloses kaolin-modified mildew-resistant paperboard paint and a preparation method thereof. The preparation method comprises 1, putting Chinese herbal medicines into water and carrying out decoction to obtain Chinese herbal medicine extract, 2, under UV, carrying out activation treatment on kaolin, plant ash, sodium chloroplatinate and molybdenum disulfide to obtain an activator, 3, under acidic conditions, mixing the activator and amino acids and carrying out modification treatment to obtain a modified activator, 4, making an acrylic acid emulsion, polystyrene, dioctyl phthalate, alumina, boron nitride and sodium nitrite contact so the materials react, adding an emulsifier, the modified activator and the Chinese herbal medicine extract into the reaction product and carrying out mixing to obtain the kaolin-modified mildew-resistant paperboard paint. The Chinese herbal medicines comprise folium artemisiae argyi, Chinese yam, borneol, honeysuckle stem, ligusticum wallichii, ricepaperplant pith medulla tetrapanacis, radix angelicae sinensis, root of kudzu vine, trichosanthes bark and coptis root. The paint can be stably attached to the surface of a carton main body and has excellent waterproof and antibacterial performances.

The invention discloses a kaolin modified mouldproof paper board and a preparation method thereof. The preparation method comprises the following steps: 1) putting Chinese herbal medicines into water to be decocted, so as to obtain a Chinese herbal medicine extracting solution; 2) in presence of ultraviolet ray, carrying out activating treatment on kaolin, plant ash, sodium chloroplatinate and molybdenum disulfide, so as to obtain an activator; 3) under acidic condition, mixing the activator with amino acid, and then modifying, so as to obtain a modified activator; 4) carrying out contact reaction on acrylic emulsion, polystyrene, dioctyl phthalate, aluminium oxide, boron nitride and sodium nitrite, then adding an emulsifying agent, the modified activator and the Chinese herbal medicine extracting solution, and mixing, so as to obtain mouldproof paint; and 5) coating the mouldproof paint on the surface of a paper board body, and drying, so that the kaolin modified mouldproof paper board is obtained. The mouldproof paper board has excellent mechanical, waterproof and antibacterial properties.

The invention relates to the field of cultural relic detection and discloses a method for detecting an ancient silk fabric. The method comprises the following steps: extracting silk fibroin by adopting formic acid and a calcium nitrate solution system; then preparing a graphene nano compound modified working electrode through a mixed system of graphene oxide, propylene diamine, sodium hexachloroplatinate hexahydrate and sodium borohydride; successively modifying a silkworm silk fibroin antibody and a detected sample on the working electrode; and electrochemically detecting current value respectively, and judging whether the sample is the silk fabric or not through analyzing the changes of the current value. The method provided by the invention is simple to operate and high in sensitivity.

The invention discloses a synthetic method for the vitamin drug intermediate diketogulonic acid. The synthetic method comprises the following steps: adding 2,3,4,6-diketosorbomethyl ether and a butanesolution into a reaction vessel, increasing a solution temperature, adding lead tetraacetate and an aqueous solution, controlling a stirring speed and continuing a reaction; and raising the temperature, adding sodium chloroplatinate powder, carrying out a reaction, adding an oxalic acid solution, adjusting a pH value, lowering the temperature, carrying out standing to allow a solid to be precipitated, washing the solid with a potassium chloride solution, then washing the solid with a butyl ether solution, carrying out recrystallization in a 1,4-butanediol solution, and then carrying out dehydration with a dehydrating agent to obtain the finished diketogulonic acid.

The invention discloses a bentonite-modified mould-proof cardboard and a preparation method thereof. The preparation method includes 1), decocting Chinese herbal medicines in water to obtain Chinese herbal medicine extract; 2), in the presence of ultraviolet rays, activating bentonite, plant ash, sodium chloroplatinate and molybdenum disulfide to obtain activators; 3), subjecting the activators and amino acids to modification under an acidic condition to obtain modified activators; 4), subjecting acrylic emulsion, polystyrene, dioctyl phthalate, aluminum oxide, boron nitride and sodium nitrite to contact reaction, and adding emulsifying agents, the modified activators and the Chinese herbal medicine extract into a reaction product with mixing to obtain a mould-proof coating; 5), applying the surfaces of a cardboard body with the mould-proof coating prior to drying so as to obtain the bentonite-modified mould-proof cardboard. The bentonite-modified mould-proof cardboard has the excellent mechanical, waterproof and antibacterial properties.

The invention relates to the field of cathode catalysts of proton-exchange membrane fuel cells (comprising direct alcohol fuel cells, direct formic acid fuel cells and direct dimethyl ether fuel cells and the like), and provides a preparation method of a carbon-loaded Co core-Pt shell nanoparticle catalyst. Carbon-loaded Co@Pt nuclear shell nanoparticles are prepared by connecting sodium chloroplatinate on the surface of a pre-synthesized Co core through hydrogen-bond interaction by way of chemical reduction and heat treatment. The carbon-loaded Co core-Pt shell nanoparticles synthesized by the method are highly dispersed, and the grain size is 3-6.5nm. The mass ratio activity (0.5V vs.SCE) of the carbon-loaded Co core-Pt shell nanoparticles on catalytic oxygen reduction reaction at room temperature can reach 158.5mA.mg<-1>Pt to the maximum extent, and is superior to that of an industrial Pt / C catalyst (JM-3000). The catalyst can be applied to the field of cathode catalysts of proton-exchange membrane fuel cells.

The invention discloses platinum-ceramic composite powder as well as a preparation method and an application thereof and belongs to the field of metal and ceramic powder composite. The platinum-ceramic composite powder is spherical powder, the particle size distribution is 0.2-1.2 mu m, the average particle size is 0.45 mu m, the specific surface area is 20-45 m<2> / g, the bulk density is 0.5-1.2 g / cm<3>, and the tap density is 0.8-1.8 g / cm<3>. The preparation method of the platinum-ceramic composite powder comprises steps as follows: sensitized and activated ceramic powder is mixed with a sodium chloroplatinate solution, reduction is performed with a chemical reduction method, and the platinum-ceramic composite powder is prepared. The platinum-ceramic composite powder can be used as platinum electrode paste, and the performance of a platinum electrode prepared by sintering the powder on the ceramic surface is remarkably improved. The preparation method of the platinum-ceramic composite powder is simple and easy to implement, and industrial production is facilitated.

The invention discloses an electroplating process capable of improving surface smoothness of a pressure-equalized electrode probe of a high-voltage direct-current converter valve. The pretreated pressure-equalized electrode probe is put in an electroplating liquid for platinum plating treatment, the electroplating liquid is prepared from ingredients as follows: 0.001-6 mol / L of sodium tetrachloroplatinate or sodium chloroplatinate, 0.1-10 mol / L of ethylenediamine tetraacetic acid disodium salt or ethylenediamine tetraacetic acid tetrasodium salt; the pressure-equalized electrode probe serves as a work electrode, an annular platinum sheet serves as a counter electrode, and the pressure-equalized electrode probe is placed in the middle of the annular platinum sheet; the temperature of the electroplating liquid is 5-75 DEG C, the pH value of the electroplating liquid is 6-7.5, the electroplating current is 0.01-10 mA / cm<2>, and the plating layer on the surface of the pressure-equalized electrode probe is 0.1-5 mu m. The electroplating process is simple and easy to control, the activity of platinum ions and the diffusion coefficient of the platinum ions in the electroplating liquid are limited, so that the reduction reaction speed of platinum is controlled, and the surface smoothness of a platinum deposition layer is further controlled to reach the mirror surface.

The invention relates to a method for preparing a highly efficient and stable Pt / GC catalyst, comprising the following steps: 1) uniformly dispersing graphitized carbon in an aqueous alcohol solution to obtain a dispersed solution of graphitized carbon; 2) adding Nafion solution to the aqueous alcohol solution Stir evenly, add chloroplatinic acid or sodium chloroplatinate solution and continue stirring to adjust the pH value; 3) The mixed solution is condensed and refluxed to obtain the Pt precursor sol; 4) The graphitized carbon dispersion solution is added to the Pt precursor sol, and continue Condensation and reflux, after the reaction, cool the obtained Pt-loaded graphitized carbon colloid to room temperature, filter and wash the product, and vacuum-dry it to constant weight to obtain the obtained product. The invention has the following beneficial effects: 1) The utilization rate of Pt is improved. 2) Ensure that the Pt particles are uniformly and stably distributed on the graphitized carbon support in nanometer size. 3) It ensures that the catalyst has higher corrosion resistance and environmental tolerance.

The invention discloses a kaolin modified mouldproof paper board and a preparation method thereof. The preparation method comprises the following steps: 1) putting Chinese herbal medicines into water to be decocted, so as to obtain a Chinese herbal medicine extracting solution; 2) in presence of ultraviolet ray, carrying out activating treatment on kaolin, plant ash, sodium chloroplatinate and molybdenum disulfide, so as to obtain an activator; 3) under acidic condition, mixing the activator with amino acid, and then modifying, so as to obtain a modified activator; 4) carrying out contact reaction on acrylic emulsion, polystyrene, dioctyl phthalate, aluminium oxide, boron nitride and sodium nitrite, then adding an emulsifying agent, the modified activator and the Chinese herbal medicine extracting solution, and mixing, so as to obtain mouldproof paint; and 5) coating the mouldproof paint on the surface of a paper board body, and drying, so that the kaolin modified mouldproof paper board is obtained. The mouldproof paper board has excellent mechanical, waterproof and antibacterial properties.

The invention relates to a method for deep hydrofinishing of lubricant base oil. Based on the base oil produced by adopting a hydrogenation process, or using the base oil isodewaxed by hydrogenation as a raw material, the lubricant base oil with light and heat stability is produced. A catalyst comprises the following components in percent by weight: 40.0-99.9 percent of aluminum oxide, 0.0-60.0 percent of silicon oxide, and 0.1-1.0 percent of platinum and / or palladium; the aluminum oxide is selected from modified gamma-aluminum oxide and modified amorphous silica and alumina, the silicon oxide is selected from amorphous silica and alumina, platinum is selected from one or more of chloroplatinic acid, potassium chloroplatinate, ammonium chloroplatinate and sodium chloroplatinate, and palladium is selected from one or more of palladium chloride, palladium sulfate, ammonium tetrachloropalladate and potassium chloropalladite. According to the method, through deep hydrofinishing of the base oil produced by using a hydrogenation process, or aromatic hydrocarbon and olefin in the lubricant base oil isodewaxed by hydrogenation, the oxidation stability and light stability of a product are improved, the color of an oil product is improved, and the pour point of the product is not increased.

The invention relates to a method for preparing a low Pt loading capacity type fuel battery catalyst by utilizing MOF as a template. The method comprises the following steps: dispersing cobalt nitrate, 2-aminoterephthalic acid and triethylene diamine in N,N-dimethyl formamide to obtain an MOF precursor mixing solution; preparing MOF according to a solvent heating method; washing; drying to obtainMOF powder; adding to a sodium chloroplatinate or chloroplatinic acid solution; stirring; dissolving; allowing standing still; washing; drying; performing high-temperature treatment and pickling underinsert atmosphere; centrifugally washing and drying the product; grinding to obtain the low Pt loading capacity type fuel battery catalyst. The method has the following advantages and beneficial effects: the Pt content in the catalyst is obviously decreased, so that the problem of high cost of the catalyst of a current fuel battery can be solved; low Pt loading capacity type catalyst is outstanding in catalyzing activity; the quality activity of the Ptd is increased by 2-5 times when being compared with that of the conventional commercial Pt / C catalyst.

Mildew-resistant paperboard coating based on bentonite modification and a preparing method thereof are disclosed. The method includes 1) adding Chinese herbal medicines into water, and decocting to prepare a Chinese herbal medicine extract, 2) activating bentonite, plant ash, sodium chloroplatinate and molybdenum disulfide under existence of ultraviolet ray to obtain activated compounds, 3) under an acidic condition, mixing the activated compounds with amino acids, and modifying to obtain modified activated compounds, and 4) subjecting acrylic acid emulsion, polystyrene, dicapryl phthalate, alumina, boron nitride and sodium nitrite to a contact reaction, adding an emulsifier, the modified activated compounds and the Chinese herbal medicine extract, and mixing to obtain the coating. The Chinese herbal medicines comprise argy wormwood leaves, hogfennel root, radix platycodonis, stir-fried perilla fruit, Sichuan lovage rhizome, tangshen, Chinese angelica, kudzu vine root, inula herb and rhizoma coptidis. The coating can be stably attached to the surface of paperboard bodies, and has excellent waterproof and antibacterial properties.