65 results about "Material Pore Size" patented technology

The invention discloses a hierarchical porous SSZ-13 molecular sieve catalyst, a method for synthesizing the same and application of the hierarchical porous SSZ-13 molecular sieve catalyst. The method includes that long-chain silane is selected to be used as an auxiliary for crystallization synthesis reaction, molar ratios of alkali sources, silicon sources, aluminum sources, template agents, the long-chain silane and water are regulated, and segmented dynamic / static crystallization modes are adopted. Synthesizing procedures include steps of gel forming and aging, crystallizing, washing, template agent removing and activating, ion exchanging and activating and the like. High-crystallinity hierarchical porous SSZ-13 molecular sieves with micropore-mesopore ordered distribution can be obtained by the aid of the method. The obtained molecular sieves have distribution of two types of pore sizes in a 2-5 nm range and a 5-15 nm range, the volumes of micropores are larger than 0.20 cm<3> / g, the volumes of mesopores are larger than 0.35 cm<3> / g, the specific surface areas are larger than 400 m<2> / g, and the yield of crystallization products can reach 85% at least. The hierarchical porous SSZ-13 molecular sieve catalyst, the method and the application have the advantages that the SSZ-13 molecular sieves not only have merits of micropore zeolite, but also have merits of mesopore materials which have large pore sizes and are favorable for macromolecule diffusion, the hierarchical porous SSZ-13 molecular sieve catalyst has a broad application prospect in the fields of petrochemical engineering, MTO (methanol to olefin) reaction, tail gas purification and fine chemical engineering, and the like.

The present invention relates to a multi-level pore material, which comprises a multi-level porous material, and comprises a material body, wherein the material body comprises pore cavities graded according to the material pore size and cavity walls enclosing to form the pore cavities, and the pore cavities present the uniform distribution. The multi-level pore material is characterized in that the cavity wall encloses to form the upper-level cavity in a three-dimensional space manner while is provided with the lower-level pore cavity, various levels of the pore cavities are respectively communicated to each other and penetrate through each other, and the uniform distribution of the pore cavities is that the uniform distribution is presented under any unit-level volume on the multi-level pore material. According to the present invention, the grading structure form of the pore cavities of the material can meet a variety of function requirements; and the pore distribution uniformity of the multi-level pore material is measured in the small unit-level volume scale, such that the multi-level pore material is highly uniform so as to ensure the uniformity of the multiple performances of the multi-level pore material.