Method for synthesizing mordenite MOR molecular sieve, and product and use thereof

摘要

Provided are a method for synthesizing a mordenite (MOR) molecular sieve with a variable localisation and distribution of B acid sites, and a product thereof and the use thereof. More specifically, provided is a method for synthesizing a mordenite MOR molecular sieve with acid sites being preferentially located at an 8-membered ring "side pocket" in communication with a 12-membered ring pore channel in the presence or absence of an inorganic base. The method comprises introducing an additional reagent and an optional fluorinating reagent which have different structures and charge densities into a synthetic gel, and the B acid sites of the obtained MOR zeolite are preferentially located at an 8-membered ring "side pocket" in communication with a 12-membered ring pore channel. A catalyst product obtained by this method exhibits an excellent performance in terms of adsorption and catalysis. The synthesis method is simple and has a broad industrial application prospect, and is particularly applied to catalysts for dimethyl ether carbonylation reaction.