| 摘要 |
A zeolite of the L type is prepared by an approximately stoichiometric process wherein the zeolite is crystallized from a reaction mixture aged at from 80 DEG to 260 DEG C. containing specified ranges of molar ratios of KOH (and optionally a minor amount of NaOH), water, potassium silicate, and a source of alumina preferably derived from kaolin or halloysite. Most preferably, the source of alumina is metakaolin.
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