Method for synthesizing SSZ-13 molecular sieve through solid-phase grinding

Abstract

The invention relates to the field of molecular sieve preparation, and aims to provide a method for synthesizing an SSZ-13 molecular sieve through solid-phase grinding. The method for synthesizing the SSZ-13 molecular sieve through solid-phase grinding comprises the following steps: weighing a silicon source, an aluminum source, an alkali source and a template agent for crystallization reaction so as to obtain a crystallization reaction product after the reaction is completed, cooling and washing till being neutral, drying to obtain crude molecular sieve powder, and roasting the crude molecular sieve powder for 5 hours in air of 550 DEG C, thereby obtaining a final product SSZ-13 molecular sieve. The SSZ-13 molecular sieve with relatively good crystallinity degree is synthesized through solid-phase raw material grinding under a solvent-free condition, so that the use of solvent water is reduced to the maximum extent, the synthesis route only involves mixing synthesis steps of primary raw materials, the method is greatly simplified when being compared with a conventional method, the yield and the utilization rate of a single kettle are both relatively increased, the production cost is greatly lowered, the pollution to the environment is greatly reduced, and great industrial application prospect can be achieved.

Description

technical field [0001] The invention relates to the field of molecular sieve preparation, in particular to a method for synthesizing SSZ-13 molecular sieves through solid phase grinding. Background technique [0002] Molecular sieves are characterized by their regular and orderly structure, adjustable skeleton composition, very high surface area and adsorption capacity, cation exchangeability, good shape selectivity of pores, high thermal stability and chemical stability, etc. Has been widely used in the field of catalytic industry. A new molecular sieve SSZ-13 was synthesized by the American chemist Zones S I through a hydrothermal method. SSZ-13 has good thermal stability and can be used as a carrier for adsorbents or catalysts, such as air purifiers, automobile exhaust catalysts, etc. At the same time, SSZ-13 also has cation exchange and acidity adjustable, so it has good catalytic performance for a variety of reaction processes, including methanol to light olefins (MTO...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation process causes a large amount of solvent waste, and the template synthesis steps are complicated and expensive

On the other hand, the solvent will cause high pressure in the kettle during heating, and the product yield is low

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