Catalyst with shape selecting function

Abstract

The invention relates to a catalyst with shape selecting function, which mainly solves the problems that the shape selecting function of the conventional shape selective catalyst is difficult to realize, the molecular sieve has the shape selecting function after modifying and the modified catalyst has lower activity. The catalyst with the shape selecting function comprises the following components in part by weight: a) 5 to 95 parts of core-shell molecular sieve material and b) 5 to 95 parts of adhesive, wherein the core phase of the core-shell molecular sieve is selected from ZSM-5, ZSM-11, ZSM-35, ZSM-48, beta, mordenite, MCM-22 and phosphorus-aluminum molecular sieve; and the technical scheme that the core-shell molecular sieve is continuous and compact ZSM-5 crystalline grains well solves the problems. The catalyst can be used in industrial production of methylbenzene selective disproportionation and methylbenzene methylation.

Description

Technical field

[0001] The present invention relates to a catalyst with a shape-selective function. Furthermore, the present invention relates to a catalyst with a shape-selective function that uses a core-shell molecular sieve with a high silicon-to-aluminum ratio or a pure silicon-shell layer as the main active ingredient. . Background technique

[0002] Zeolite molecular sieves contain regular nano-pores with adjustable acidity. Since the 1960s, they have been widely used in petroleum refining and chemical industries, such as catalytic cracking, catalytic reforming, disproportionation, transalkylation, isomerization and Catalytic reaction processes such as alkylation. With the continuous development of zeolite catalytic technology, people have put forward higher and higher requirements for the catalytic performance of zeolite molecular sieve catalysts. Shape-selective catalysis is a concept first proposed by Weisz and Frilette in 1960 when studying the catalytic reaction of ...

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