7results about How to "Reduce metal content" patented technology

The application discloses a catalytic cracking slurry oil hydrogenation protective agent and a preparation method thereof. The hydrogenation protective agent comprises a carrier and hydrogenation active metal, wherein the carrier is alumina, the hydrogenation active metal comprises molybdenum oxide and cobalt oxide, and the alumina carrier has the following properties: the most probable pore diameter is 40-100 nm, preferably 50-70 nm, and the pore volume of the pore with a diameter of (the most probable pore diameter-30) nm to (the most probable pore diameter+30) nm accounts for more than 75% of the total pore volume. The hydrogenation protective agent adopts the alumina carrier with a suitable pore diameter and a suitable large-pore pore volume ratio, can eliminate the diffusion resistance of macromolecules in the process of adsorption on the surface of the catalyst and reaction of catalytic cracking slurry oil hydrogenation, and is beneficial to the hydrogenation reaction.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

To provide a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low, and a method for producing a fluorinated elastic copolymer, whereby it is possible to obtain a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low. A fluorinated elastic copolymer in which the content of metal elements is at most 20.0 ppm by mass and the content of chloride ions is at most 1 ppm by mass; and a method for producing a fluorinated elastic copolymer, which comprises coagulating a fluorinated elastic copolymer in a latex containing the fluorinated elastic copolymer by using an acid containing no metal elements or no chloride ions, and washing the coagulated fluorinated elastic copolymer with a liquid medium having a content of metal elements of at most 2.0 ppm by mass and a content of chloride ions of at most 2 ppm by mass.

This invention provides a method for preparing and applying a trifluoromethoxyamide-bridged aromatic amine compound. The preparation method utilizes a continuous flow reaction system comprising two continuous flow reaction units connected in series, namely reaction unit A and reaction unit B. An amidation reaction is carried out in reaction unit A, and a reduction reaction is carried out in reaction unit B. The prepared trifluoromethoxyamide-bridged diamine compound exhibits high purity and whiteness and can be used to prepare polyimides for various electrical and optical components.

The utility model relates to an ultra-pure polyethylene slurry method production system which comprises a reaction kettle provided with a slurry discharge port; the flash tank is connected with the slurry discharge hole of the reaction kettle, and a gas circulating pipeline is arranged at the top of the flash tank and is used for circulating flashed gas components to the reaction kettle; the rotary drum filtering unit is connected with a discharge hole of the flash tank and is used for sequentially filtering, washing and drying the flashed slurry, a filtrate outlet of the rotary drum filtering unit is connected with a solvent collecting tank, and the solvent collecting tank is communicated with the reaction kettle through a pipeline and is used for circulating a solvent to the reaction kettle. Compared with the prior art, the system has the advantages that the reaction kettle, the flash tank and the rotary drum filtering unit are efficiently connected, solvent and unreacted gas raw materials are recycled, a closed-loop material circulation system is formed, and waste and emission of the raw materials are reduced. According to the drum filter unit, the traditional dispersed procedures of filtering, washing and drying are integrated into an integrated process, so that the number of equipment and the occupied area are greatly reduced, and the operation and maintenance cost is reduced.

The invention belongs to the technical field of inorganic materials, and particularly discloses a method for producing water glass and co-producing sylvite by utilizing biomass, which comprises the following steps: (a) carrying out oxygen-enriched combustion on the biomass at 650-800 DEG C; (b) mixing biomass ash obtained by combustion with water, carrying out heating pretreatment, and carrying out solid-liquid separation while the mixture is hot after the heating pretreatment is ended, so as to obtain clarified filtrate and a biomass ash filter cake; (c) mixing the biomass ash filter cake with an alkali solution, dissolving, and performing solid-liquid separation to obtain biomass ash and water glass; and (d) continuously recycling the clarified filtrate until crystals are separated out, continuously cooling and crystallizing, and carrying out solid-liquid separation to obtain the sylvite. According to the method, the directional conversion mode of the potassium element in the biomass is achieved, the potassium element is directly extracted, the treated biomass ash enters the rear end to be prepared into the water glass, synchronous production of the bio-based water glass and the high-purity potassium salt is directly achieved, the process is simple, the cost is low, and an innovative path is provided for industry green transformation.

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.