Patent ID: 7282616

Claim:
A process for converting an olefin feed to hydrocarbons suitable for fuel components or their feedstock, which process comprises: contacting the olefin feed, optionally together with another hydrocarbon feed, in a reactor with a catalyst in order to produce a hydrocarbon having at least one alkyl side chain, wherein the olefin feed is contacted with a fluidized catalyst in particle form in a reactor with a circulating bed, such that the contact time between the olefin feed and the catalyst is 0.0001-5 seconds and the retention time of the feed in the reactor is 0.01-3 seconds, said reactor comprising a reactor unit having a tubular or annular riser having a substantially vertical central axis, a cyclone apparatus for separating gaseous hydrocarbon from solids which includes at least one multi-inlet cyclone, and which is arranged at the upper end of the riser as a continuation or the riser, and in which the cyclone has one or several inlet ports connected to the riser and separate outlet ports for the solids and the gas, and a dipleg connected to the solids outlet port of the cyclone, which dipleg is arranged substantially concentrically around the riser and has in the transverse direction a substantially annular or tubular cross-section; and wherein the catalyst constitutes the circulating bed in the reactor and the catalyst circulates through the riser and the cyclone at least ten times before being directed to a regeneration unit; the hydrocarbon product and the catalyst are separated in a cyclone; the catalyst particles directed to a regeneration unit are regenerated at an elevated temperature; and the regenerated catalyst particles are recycled to the circulating-bed reactor.