The core inside preparation mannered null of the stratified conversion

摘要

PROBLEM TO BE SOLVED: To provide a method for preparing a laminated composition expressing effective catalytic action.;SOLUTION: The composition includes an inner core and an outer layer containing molecular sieve. The method includes preparing inner core particles and a slurry containing a skeleton element source of molecular sieve. Molecular sieve crystals aggregating on the inner core are formed by adding a nutrient, that is, the skeleton element source. The method is carried out for sufficient time to form a layer having a desired thickness.;COPYRIGHT: (C)2009,JPO&INPIT