| 摘要 |
A method for manufacturing a ZSM-5 aluminosilicate zeolite from a silica source, an alumina source, water, an alkali metal phosphate and an alkali metal fluoride which comprises crystallizing, at crystallizing conditions, an aqueous crystallizing gel comprising colloidal silica and colloidal alumina in a molar ratio of more than 20 moles of colloidal silica per mole of colloidal alumina, alkali metal phosphate in a molar ratio of 1.8 to 2.7 moles of said phosphate per mole of colloidal alumina, and alkali metal fluoride in a molar ratio between 0.5 and 2.1 moles of said fluoride per mole of colloidal alumina. |
