Patent ID: 8057641

Claim:
A process for biomass conversion comprising: a) utilizing a riser reactor having a mixing zone, an intermediate zone located above said mixing zone, and an upper zone located above said intermediate zone; b) charging a biomass feed and a heat carrier material to said mixing zone above the location where a lift gas is charged to said mixing zone, thereby forming a mixture; c) converting said biomass feed in said mixture to thereby form a reaction mixture comprising said heat carrier material and a product stream comprising oxygenated hydrocarbons; d) charging at least one quench stream to said riser reactor through at least one quench stream conduit connected in fluid flow communication with said riser reactor at a location within: i) said intermediate zone, ii) said upper zone, or iii) both said intermediate zone and said upper zone, thereby lowering the temperature of said reaction mixture; and e) separating at least a portion of said product stream from said heat carrier material in a disengager which is connected in fluid flow communication with said upper zone of said riser reactor.