Abstract:
Low value feed hydrocarbons are converted to high octane value tertiary ethers using a multiple riser fluidized solids catalytic reactor wherein in a first riser the hydrocarbon feed is converted to iso and linear C. sub. 4 and C. sub. 5 olefins, the iso-olefins are etherified, the linear C. sub. 4 and C. sub. 5 olefins are isomerized to iso C. sub. 4 and C. sub. 5 olefins in a second riser of the fluidized solids reactor, iso C. sub. 4 and C. sub. 5 olefins from the second riser are also etherified to high octane value tertiary ethers, and catalyst from both risers is regenerated in a common regeneration zone.