| abstract |
The specification discloses conversion of hydrocarbons using, as catalyst, a crystalline zeolite designated ZSM-12. The zeolite has the following composition: n n 1,0 ± 0.4 M.sub.2 O . W.sub.2 O . 20-200 YO.sub.2 . ZH.sub.2 O n n where M is at least one cation and n is the valence thereof, W is aluminum or gallium, Y is silicon or germanium, and Z is a value ranging from 0 to 60. In a preferred synthesized form, M is a mixture of alkali metal cations, especially sodium, and tetraalkylammonium cations. These zeolites are characterized by a specified x-ray powder diffraction pattern. Catalytically-active forms of said zeolites are used in a wide variety of hydrocarbon conversion reactions. |