Main > POLYMERS > Oligomer > Olefin Oligomer > Catalyst > Molecular Sieve. Zeolite. > Patent > Claims > Claim 1: Core. Surface Layer (SL). > Core & SL: Zeolite Contg Si & Al. > Same Crystalline Structure. > (Si: Al)SL>(Si:Al)Core. Claim 2:

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(Si: Al)SL>(Si:Al)Core. Claim 2:'s subsections
(Si: Al)SL=300-1500:1. Claim 3:

(Si: Al)SL>(Si:Al)Core. Claim 2:'s products
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