초록

A process for manufacturing synthetic nitrogenous zeolites such as ZSM-5 in which the shape or some other feature of the microscopic crystals is controlled by including in the forming solution an organic basic nitrogen compound in addition to the organic nitrogenous template.

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In a process for manufacturing a synthetic zeolite having a silica to alumina ratio of at least about 12 and a characteristic microscopic texture, which process comprises crystallizing an aqueous forming solution comprising a source of SiO2 and a nitrogenous template, and recovering said synthetic z

In a process for manufacturing a synthetic zeolite having a silica to alumina ratio of at least about 12 and a characteristic microscopic texture, which process comprises crystallizing an aqueous forming solution comprising a source of SiO2 and a nitrogenous template, and recovering said synthetic zeolite, the improvement which comprises adding to said forming solution an amount of substantially colorless organic basic nitrogen compound selected from the group consisting of quaternary ammonium compounds having not more than three methyl, three ethyl or three propyl substituents, and amines, said basic nitrogen compound having a chemical structure different from said template, and said amount being effective to alter said microscopic texture.