| 摘要 |
A method of manufacture of a ZSM-5 aluminosilicate zeolite is disclosed with specific ingredients in the crystallizing gel and which must be present in certain specified molar proportions. The aqueous gel comprises colloidal silica:colloidal alumina:Na3PO4:KF:water in a ratio of between 20 to 1 to 50 to 1 moles of colloidal silica to colloidal alumina and between 1.8 to 2.7 moles of Na3PO4 per mole of colloidal alumina. It is preferred that greater than 0.5 to less than 2.04 moles of KF per mole of colloidal alumina is also present in the crystallizing gel. Variance from these ingredients or the relative stoichiometry of same results in the production of ferrierite, mordenite or an amorphorous aluminosilicate.
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