Fluid catalyst conversion of alcohols and oxygenates to hydrocarbons

An apparatus for converting reactants comprising lower alcohols and related oxygenates in the presence of fluid catalyst particles to C.sub.10 and lower boiling hydrocarbons including LPG and gaoline-boiling components comprising:

• a relatively large diameter reactor vessel provided with a perforated grid means across a lower cross-section thereof, a fluid bed of catalyst particles above said grid means and a plurality of vertical elongated tubular baffle means arranged within said bed of catalyst, said tubular baffle means being provided with a plurality of openings in the walls thereof sufficient to provide cross-flow of catalyst particles through said tubular baffle means and restrict reactant bubble growth within desired limits,
• a riser reactor in open communication with the bottom of said large diameter reactor vessel beneath said grid means,
• a plurality of satellite stripping-cooling chambers adjacent said large reactor vessel, each of said chambers provided with a catalyst transfer conduit between said fluid bed of catalyst and said stripping-cooling chamber, a gaseous material transfer conduit communicating between the top of said stripping-cooling chamber and said large diameter vessel above the upper level of the bed of catalyst therein,
• conduit means communicating between the bottom of said stripping-cooling chambers and the lower portion of said riser reactor, means for charging vaporous reactant material to a lower portion of said riser reactor, means for charging stripping gas to a lower portion of said stripping-cooling chambers beneath indirect heat exchange means therein, and
• means for withdrawing reaction product material from an upper portion of said large diameter reactor vessel.