Heat disposed in lower alcohols and derivatives conversion to gasoline hydrocarbons in a crystaline zeolite fluidized bed

Claim 1

A method for effecting exothermic chemical reactions in the presence of a select class of crystalline zeolites represented by ZSM-5 crystalline zeolite promoting the formulation of hydrocarbon product materials higher boiling than the reactant charge material which comprises, passing a lower alcohol alone or in admixture with an ether derivative thereof in admixture with said special crystalline zeolite as suspension initially formed at a temperature in the range of about 400° to 600° F. upwardly through a relatively short riser mixing zone discharging into the bottom portion of a dense fluid bed of catalyst maintained in a larger-diameter reaction zone, said dense fluid bed of catalyst restricted vertically throughout its cross-section to restrict upflowing reactant bubble growth not to substantially exceed about 6 inches during contact with catalyst particles under substantially reactant plug flow conditions, recovering a reactant product comprising gasoline boiling hydrocarbons from said fluid bed of catalyst at a temperature below 900° F. separate from catalyst particles, and passing catalyst particles from an upper portion of said dense fluid bed of catalyst through a cooling zone and thence to a bottom portion of said riser mixing zone.

Claim 2

A method for effecting exothermic chemical reactions in the presence of a select class of crystalline zeolites represented by ZSM-5 crystalline zeolite promoting the formulation of hydrocarbon product materials higher boiling than the reactant charge material which comprises, passing a lower alcohol alone or in admixture with an ether derivative thereof in admixture with said special crystalline zeolite as suspension initially formed at a temperature in the range of about 400° to 600° F. upwardly through a relatively short riser mixing zone discharging into the bottom portion of a dense fluid bed of catalyst maintained in a larger-diameter reaction zone, said dense fluid bed of catalyst restricted vertically throughout its cross-section to restrict upflowing reactant bubble growth not to substantially exceed about 6 inches during contact with catalyst particles under substantially reactant plug flow conditions, recovering a reactant product comprising gasoline boiling hydrocarbons from said fluid bed of catalyst at a temperature below 900° F. separate from catalyst particles, and passing catalyst particles from an upper portion of said dense fluid bed of catalyst through a cooling zone and thence to a bottom portion of said riser mixing zone.