Making an olefin product from an oxygenate

A method for converting an oxygenate-containing feedstock to an olefin product, comprising:

• contacting an oxygenate-containing feedstock with a silicoaluminophosphate catalyst in a fluidized bed reactor under conditions effective to convert the oxygenate-containing feedstock to an olefin product;
• separating the olefin product from the catalyst;
• regenerating a portion of the separated catalyst;
• recirculating the regenerated catalyst into the fluidized bed reactor contacting the regenerated catalyst with the oxygenate-containing feedstock in the fluidized bed reactor;
• and
• selecting a recirculation rate for the regenerated catalyst to maintain an average catalyst feedstock exposure index of at least 1.0.

A method for converting an oxygenate-containing feedstock to an olefin product, comprising:

• contacting an oxygenate-containing feedstock with a silicoaluminophosphate catalyst in a fluidized bed reactor under conditions effective to convert the oxygenate-containing feedstock to an olefin product;
• separating the olefin product from the catalyst;
• separating the separated catalyst into a first catalyst portion and a second catalyst portion;
• regenerating the first catalyst portion under conditions effective to obtain a regenerated catalyst having a coke content of less than 2 wt. %;
• combining the regenerated catalyst portion with the second catalyst portion to from a combined catalyst portion;
• recirculating the combined catalyst portion into the fluidized bed reactor;
• contacting the combined catalyst portion with the oxygenate-containing feedstock in the fluided bed reactor;
• and
• maintaining an average catalyst feedstock exposure index of at least 1.0.