10 results about "Platinum-containing Compounds" patented technology

The invention relates to the field of flame retardants, in particular to flame-retardant silicon rubber, an organic silicon rubber flame-retardant aid and a preparation method. The flame retardant comprises the following components in parts by weight: 100 parts of polysiloxane; 50 to 400 parts of zinc-containing powder; 1-8 parts of a silane treating agent; and 100 to 2000 ppm of a platinum-containing compound. A platinum-containing compound, zinc-containing powder and a silane coupling agent are dispersed into polysiloxane to prepare paste, the ceramic forming ability of a platinum-containing catalyst is enhanced through the zinc-containing powder and the silane coupling agent, and the flame retardant effect of the platinum-containing compound is improved.

Provided in the present invention are a continuous-reforming catalyst and a preparation method therefor, belonging to the technical field of catalyst preparation. The method comprises: performing hydrothermal crystallization on a first aluminum source and a modifier to obtain aluminum oxide precursor nanofibers; mixing the aluminum oxide precursor nanofibers with a second aluminum source, and adding the mixture to a solution of a platinum-containing compound, a tin-containing compound, and a lanthanide-containing compound to prepare a catalyst precursor slurry; adding gelatin and gum arabic to the catalyst precursor slurry, uniformly mixing same to prepare a composite colloidal solution, adding the composite colloidal solution dropwise to a liquid column consisting of an upper-layer oil phase and a lower-layer curing agent solution to shape the composite colloidal solution, then after aging, drying, and calcining, obtaining an oxidized spherical catalyst; and reducing the obtained oxidized spherical catalyst to obtain an activated spherical catalyst. Because active metals can be better dispersed on the surface of the spherical catalyst, the dispersion of Pt is improved, thus improving the carbon deposition resistance and stability of the catalyst.

The invention belongs to the technical field of catalysts, and relates to a catalyst based on a carbon nanosheet loaded Cu monatomic Pt sub-nanocluster as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a nitrogen-containing precursor and benzenetricarboxylic acid into water, and uniformly stirring to obtain a suspension; adding a copper-containing compound and a platinum-containing compound into the suspension, uniformly stirring, and drying to obtain precursor powder; and carrying out heat treatment on the precursor powder under protective gas to obtain the catalyst. According to the invention, Cu monatomic and Pt atomic clusters are anchored on the ultrathin carbon nanosheets, so that the prepared catalyst can be used as a hydrogen evolution catalyst to be applied to hydrogen production, and has excellent electrochemical performance under an alkaline condition.

The application relates to a preparation method of a light alkane conversion catalyst, which comprises the following steps: impregnating an alumina carrier with a water solution containing a platinum compound, drying, roasting and reducing to obtain a catalyst precursor; impregnating the catalyst precursor with a hydrocarbon solution of alkyl aluminum chloride under the protection of dry inert gas, and then removing the solvent to obtain a pre-chlorination product; and supplementally chlorinating the pre-chlorination product with AlCl3 to obtain the catalyst. The catalyst prepared by the method has high initial catalytic activity, selectivity and better activity stability in a C4-C6 alkane conversion reaction.

The application belongs to the technical field of catalysts, and relates to a Cu monatomic Pt sub-nanometer cluster catalyst based on carbon nanosheets and a preparation method and application thereof. The preparation method comprises the following steps: adding a nitrogen-containing precursor and benzene tricarboxylic acid into water, and stirring to obtain a suspension; adding a copper-containing compound and a platinum-containing compound into the suspension, stirring, and drying to obtain a precursor powder; and performing heat treatment on the precursor powder under a protective gas to obtain the catalyst. The application anchors Cu monatomic atoms and Pt atomic clusters on ultrathin carbon nanosheets, so that the prepared catalyst can be applied to hydrogen production as a hydrogen evolution catalyst, and has excellent electrochemical performance under alkaline conditions.

The invention discloses a preparation method of silicone rubber, and belongs to the field of silicone rubber electrical insulating materials. By optimizing the components, the tracking resistance of the silicone rubber is greatly improved, the silicone rubber can pass 1A4.5 level, the mechanical property is not damaged, the flame retardance is improved, the synergistic catalytic activity of the silicone rubber is further improved by complexing the platinum-containing compound and the silane coupling agent and cooperating with the polysilazane, and the beneficial modification effect is achieved; the defects of poor compatibility, easy migration and failure and poor tracking resistance of a common silicone rubber organic tracking-resistant agent are overcome on the whole. Besides, the platinum-containing compound is subjected to a crosslinking reaction with the silicone rubber under the action of an electric arc to generate a compact ceramic-like protective layer, so that the tracking resistance and flame retardance of the silicone rubber are greatly improved, the failure caused by migration of an organic tracking-resistant tracking agent can be avoided, and the silicone rubber is convenient to purchase, simple in processing mode, convenient for industrial production and suitable for industrial production. The method has an important application prospect in the field of high-voltage insulation.

The invention discloses a continuous reforming catalyst and a preparation method and application thereof.The preparation method comprises the steps that treated aluminum oxide pellets are subjected to equivalent-volume impregnation in impregnation liquid containing organic tin and inorganic tin in sequence and roasted in the nitrogen atmosphere and the air atmosphere respectively, and aluminum oxide containing both the organic tin and the inorganic tin is obtained; and then carrying out dynamic excessive impregnation in an impregnation liquid containing a platinum compound and a competitive adsorbent, and carrying out water-chlorine activation and reduction to obtain the continuous reforming catalyst. By loading different tin species step by step and controlling the roasting atmosphere, high dispersion of the metal active component and accurate regulation and control of the acidity of the carrier are realized, and the prepared catalyst shows excellent aromatic hydrocarbon selectivity, activity stability and low carbon deposition rate in a naphtha reforming reaction, and is suitable for a high-severity continuous reforming process.

This invention relates to the field of platinum-containing compound technology, and provides a method and apparatus for the continuous synthesis of hexahydroxyplatinic acid. The invention involves mixing sodium hydroxide solution and chloroplatinic acid solution in a micromixer, followed by reaction in a reaction coil. The reaction solution is then cooled in a cooling coil to obtain a product solution containing sodium hexahydroxyplatinate. This product solution is then acidified to obtain hexahydroxyplatinic acid. The micromixer enables millisecond-level rapid mixing of sodium hydroxide and chloroplatinic acid solutions, ensuring uniform contact of the two raw materials at the microscale. Simultaneously, the design of the reaction and cooling systems allows for precise temperature control during the reaction process, solving the problems of low heat transfer efficiency and localized overheating in traditional reaction vessels, and improving product uniformity. The method provided by this invention has good safety, achieves efficient continuous synthesis of hexahydroxyplatinic acid, is suitable for scale-up production, and has significant industrial application value and promising prospects.

The invention relates to the technical field of platinum catalysts, and particularly discloses an anti-poisoning platinum catalyst and a preparation method thereof. The anti-poisoning platinum catalyst comprises the following components in parts by mass: 0.8-1.2 parts of a platinum-containing compound; 0.8 to 1.1 parts of a composite anti-toxic agent; 4.8 to 5.2 parts of a solvent; 1.8 to 2.2 parts of an auxiliary agent; the composite anti-poisoning agent is formed by compounding trimethyl gallium, diethyl aluminum chloride and dicarboxyethyl germanium trioxide. The method has the advantage of improving the anti-poisoning performance of the platinum catalyst.

The invention belongs to the technical field of precious metal secondary resource recycling, and discloses a method for preparing ammonium chloroplatinate from a platinum-containing ruthenium chloride waste liquid, which comprises the following steps: (1) mixing the ruthenium-containing platinum chloride waste liquid and sodium hydroxide into a mixed solution; (2) filtering and separating a platinum-containing compound clarified solution; (3) synthesizing hydrated platinum oxide; (4) filtering and separating hydrated platinum oxide; (5) synthesizing chloroplatinic acid crystals; and (6) drying the ammonium chloroplatinate crystal. Through the steps, platinum is separated from the ruthenium-containing platinum waste liquid and prepared into ammonium chloroplatinate. The invention provides a brand new method for preparing ammonium chloroplatinate from ruthenium-platinum chloride waste liquid, and by adopting the method, the environmental pollution and the production cost can be reduced, the production efficiency is improved, and meanwhile, the resource recycling is realized.