A catalyst for converting methanol to light olefins and the process for
making and using the catalyst are disclosed and claimed. SAPO-34 is a
specific catalyst that benefits from its preparation in accordance with
this invention. A seed material is used in making the catalyst that has a
higher content of the EL metal than is found in the principal part of the
catalyst. The molecular sieve has predominantly a roughly rectangular
parallelepiped morphology crystal structure with a lower fault density
and a better selectivity for light olefins.