A composite material (denoted as Y/MCM-41) composed of a core of zeolite Y particle and a thin layer of MCM-41 have been prepared by the crystallization of the reaction mixture of MCM-41 and zeolite Y particles. The Y/MCM-41 particle size increases with the increase of the SiO{sub}2/Al{sub}2O{sub}3 ratio of MCM-41. Introduction of hydroxymethyl fiber into the zeolite Y particle favors the significant increase of its strength, but zeolite p easily formed. The adsorption property of Y/MCM-41 is different from those of zeolite Y and MCM-41. H(Y/MCM-41) as a catalyst is highly selective to C{sub}4-C{sub}5 hydrocarbons and slowly deactivated in the cracking of n-heptane compared to the mechanical mixture particles of HY and HMCM-41 (designated as H(Y+MCM-41)).
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机译：通过MCM-41和沸石Y颗粒的反应混合物的结晶制备由沸石Y颗粒的核和薄层的晶粒Y颗粒和薄层的y / mcm-41）的复合材料（表示为y/ mcm-41）。 Y / MCM-41粒度随MCM-41的SIO {SUB} 2 / AL {SUB} 2O {SUB} 3比率的增加而增加。将羟甲基纤维引入沸石Y颗粒中的强度显着增加，但岩石P易于形成。 Y / MCM-41的吸附性质与沸石Y和MCM-41的吸附性质不同。 H（Y / MCM-41）作为催化剂对C {Sub} 4-C {亚} 5的碳氢化合物高度选择性，并与Hy和HMCM-41的机械混合物颗粒相比，在正庚烷的裂化中缓慢失活（指定为H（Y + MCM-41））。
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