NOVELTY - A solid biomass is converted to hydrocarbons by contacting solid biomass with catalyst in first riser to produce first biomass-catalyst mixture and first product comprising hydrocarbons; separating first product from first biomass catalyst mixture; charging first biomass-catalyst mixture to second riser (210) to produce second biomass-catalyst mixture and second product comprising hydrocarbons; charging second biomass-catalyst mixture to third riser to produce spent catalyst and third product comprising hydrocarbons; and separating third effluent from spent catalyst.    USE - Method for conversion of solid biomass to hydrocarbons (claimed).    ADVANTAGE - The method utilizes apparatuses, kits, and compositions which can reduce cost and increase availability of fuel and/or specialty chemicals derived from biomass; and can have synergistic effect including reducing temperature necessary for catalytic or pyrolytic conversion of biomass and/or increasing conversion efficiency of biomass, as well as facilitating processing in conventional refining units.    DETAILED DESCRIPTION - The solid biomass is converted to hydrocarbons by:    (A) contacting solid biomass with catalyst in first riser operated at 50-200 degrees C to produce first biomass-catalyst mixture and first product comprising hydrocarbons;    (B) separating first product from first biomass catalyst mixture;    (C) charging first biomass-catalyst mixture to second riser operated at 200-400 degrees C to produce second biomass-catalyst mixture and second product comprising hydrocarbons;    (D) separating second product from second biomass-catalyst mixture;    (E) charging second biomass-catalyst mixture to third riser operated at greater than 450 degrees C to produce spent catalyst and third product comprising hydrocarbons; and    (F) separating third effluent from spent catalyst.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a catalytic cracking system.    Pretreater (205)    Second riser (210)    First stripper (220)    Catalyst cooler (245)    Tower. (250)