4results about How to "Increase component content" patented technology

The application relates to the technical field of catalyst preparation, and discloses a preparation method of a catalyst for preparing 1,3-propanediol through glycerol hydrogenolysis, the catalyst and application. The preparation method of the catalyst for preparing 1,3-propanediol through glycerol hydrogenolysis comprises the following steps: (1) an excessive impregnation method is adopted to contact tungsten oxide precursors, a solvent and gamma-Al2O3, and after water bath evaporation, first drying and first calcination treatment, a composite oxide WO3 / Al2O3 is obtained; the tungsten oxide precursors are tungsten hexachloride; (2) the composite oxide WO3 / Al2O3, water and a precursor of Pt are contacted, and after water bath evaporation, second drying, second calcination and reduction treatment, a catalyst Pt / WO3 / Al2O3 is obtained. The preparation method can convert the oxide precursors into WO3 at a lower temperature, and reduces the energy consumption in the catalyst preparation process.

The embodiment of the invention provides tire cord steel and a manufacturing method thereof. The tire cord steel comprises, by mass, 0.825%-0.845% of C, 0.17%-0.21% of Si, 0.50%-0.54% of Mn, smaller than or equal to 0.018% of P, smaller than or equal to 0.010% of S, 0.04% of Cr, smaller than or equal to 0.04% of Ni, smaller than or equal to 0.05% of Cu, 0.01% of Mo, smaller than or equal to 0.0010% of Ti, smaller than or equal to 0.0020% of AL, smaller than or equal to 0.0045% of N, smaller than or equal to 0.007% of Sn and the balance iron and inevitable impurity elements. The inclusion in the wire rod comprises the following components in percentage by mass: 5-15% of Al2O3, 3-15% of MgO, less than or equal to 0.05% of TiN, less than or equal to 0.05% of TiO2, less than or equal to 0.5% of CaS, less than or equal to 4% of MnO, 39-47% of SiO2 and 36-45% of CaO. The manufacturing cost of the tire cord steel is low.

The invention relates to the technical field of preparation of adhesives and granular activated carbon, in particular to a composite adhesive, straw-based granular activated carbon and a preparation method. According to the specific technical scheme, firstly, the straw gasification tar is subjected to reduced pressure distillation under specific conditions (light components are removed at the temperature of 100 DEG C, and phenol-rich components are collected at the temperature of 170-250 DEG C) for fractional separation; phenol-rich components are used for partially replacing phenol (the replacement rate is 10-50%), the phenol-rich components react with formaldehyde under the catalysis of potassium hydroxide to synthesize phenolic resin, and sesbania powder is added for thickening. And compounding the thickened phenolic resin with the separated heavy components to obtain the composite adhesive. The adhesive and straw biochar are mixed and molded in proportion, and the straw-based granular activated carbon is prepared through the processes of hardening, carbonization, coupling activation and the like. The carbon tetrachloride adsorption rate of the product is greater than or equal to 60%, the strength is greater than or equal to 90%, and high-value utilization of straw tar and charcoal is realized.

The invention discloses a sandwich structure composite material for enhancing cementing performance and a preparation method thereof, and relates to the technical field of composite materials. The sandwich structure composite material provided by the invention is structurally characterized in that an upper skin and a lower skin are bonded with a sandwich material between the upper skin and the lower skin through a reinforced adhesive film respectively, wherein the reinforced adhesive film is structurally one of a conventional adhesive film / fiber mat / conventional adhesive film, a fiber mat / conventional adhesive film / fiber mat and a fiber mat / conventional adhesive film. The fiber mat and the conventional adhesive film are combined to form the required reinforced adhesive film, so that the mechanical property of the sandwich structure composite material can be improved, and the adhesive layer of the adhesive joint surface is prevented from being damaged.