Patent ID: 7148171

Claim:
A process for adding heat to a reactor system having an oxygenate to olefin reaction zone and a catalyst regeneration zone wherein catalyst is cycled from the reaction zone to the regeneration zone and from the regeneration zone to the reaction zone, the process comprising: cycling catalyst from said reaction zone to said regeneration zone; fluidizing catalyst in the regeneration zone in the presence of an oxygen containing gas; heating the catalyst in said regeneration zone to a first temperature of at least about 225° C. (437° F.); introducing a liquid heating fuel into the regeneration zone wherein the liquid beating fuel has about 500 wppm or less of sulfur and has about 200 wppm or less nitrogen and an autoignition temperature no greater than about 482° C. (900° F.); imparting sufficient heat content within said regeneration zone to initiate and sustain ignition of said liquid heating fuel to thereby provide a further heated catalyst; and providing said further heated catalyst into the reaction zone by cycling said further heated catalyst from said regeneration zone to said reaction zone in order for said further heated catalyst to heat said reaction zone to a temperature of at least 316° C. (600° F.).