Abstract: Provided are a preparation method for and use of a molecular sieve-based honeycomb monolithic denitrification catalyst. A molecular sieve-based catalyst, a metal-modified natural silica-aluminum mineral, an organic binder, an extrusion aid, a pore-forming agent, glass fiber, a structuring agent, an inorganic binder, an acid solution, a humectant and water are mixed and then subjected to structuring water dissolution and other processes to obtain a molecular sieve-based honeycomb monolithic denitrification catalyst.

Abstract: Provided are a method for increasing the loading capacity of a honeycomb catalyst support and the preparation of a denitrification catalyst based on the catalyst support. First, a natural silica-aluminum mineral is used to prepare a honeycomb catalyst support, a water-soluble polymer fiber bundle is used as a structuring agent, and two processes of alkali etching and structuring water dissolution are performed for pretreatment to obtain a clay-based honeycomb catalyst support; then, the catalyst support is completely immersed in a molecular sieve-based coating slurry twice for immersion and coating, and then calcined to obtain a high-load molecular sieve-based coated honeycomb monolithic denitrification catalyst. According to the provided, by performing structural adjustment on a honeycomb catalyst support, inner wall channels are effectively widened.

Abstract: The present invention pertains to the field of molecular sieve synthesis, and relates to a synthesis method of ZSM-5 type molecular sieves. In this method, natural minerals, i.e., natural kaolin and natural diatomite, are used as the total silicon source and aluminum source required for the molecular sieve synthesis, and these two natural minerals are calcinated and subjected to acidic (alkaline) treatment before they are mixed at a certain ratio, and then crystallized under hydrothermal conditions to obtain the product, a ZSM-5 type molecular sieve. The ZSM-5 type molecular sieve obtained by the method according to the present invention is a hierarchical porous material having a crystallinity of 70% to 120% as compared to conventional ZSM-5 type molecular sieves synthesized by using pure chemical reagents, and the silica-to-alumina ratio in the molecular sieve product may be adjusted by varying the ratio of the two minerals in the raw materials for the synthesis.

Abstract: The present invention relates to a synthesis method of zeolite 4A, wherein natural clay mineral, provided as the total silicon source and aluminum source required for molecular sieve synthesis, is activated before they are crystallized under hydrothermal conditions to synthesize zeolite 4A. In the method of the present invention, a simple process is employed and inexpensive raw materials are used, resulting in zeolite 4A having a whiteness of 90% or more and a calcium ion exchange capacity of no less than 310 mg CaCO3/g zeolite. According to the present invention, the range of raw materials for the preparation of molecular sieve materials is broadened, and therefore not only the cost for molecular sieve production is greatly reduced by using the sub-molten salt activation method, but also the greenness in the production process of molecular sieve materials is significantly improved.

Abstract: The present invention pertains to the field of molecular sieve synthesis, and relates to a synthesis method of ZSM-5 type molecular sieves. In this method, natural minerals, i.e., natural kaolin and natural diatomite, are used as the total silicon source and aluminum source required for the molecular sieve synthesis, and these two natural minerals are calcinated and subjected to acidic (alkaline) treatment before they are mixed at a certain ratio, and then crystallized under hydrothermal conditions to obtain the product, a ZSM-5 type molecular sieve. The ZSM-5 type molecular sieve obtained by the method according to the present invention is a hierarchical porous material having a crystallinity of 70% to 120% as compared to conventional ZSM-5 type molecular sieves synthesized by using pure chemical reagents, and the silica-to-alumina ratio in the molecular sieve product may be adjusted by varying the ratio of the two minerals in the raw materials for the synthesis.