(DE3872531-G)      Integrated continuous technique for converting oxygenated feedstock to liquid hydrocarbons comprises (a) contacting feedstock with zeolite catalyst in a prim. catalyst stage at elevated temp. and moderate pressure to convert at least a portion of the feedstock oxygenate to hydrocarbons contg. a major fraction of 2-4C olefins and a minor fraction contg. C5+ hydrocarbons; (b) cooling and sepg. effluent from step (a) to provide an aq. liquid byprod. stream, a heavy hydrocarbon liquid stream and a light hydrocarbon vapour stream rich in 2-4C olefins; (c) comprising at least a portion of the olefinic light hydrocarbons stream to condense a liquid olefinic hydrocarbon stream rich in C3+ olefins and recovering an ethane-rich gaseous stream; (d) further pressurising and contacting substantially all of the    (JP2557440-B2)      Fluidised bed catalytic process for converting a light olefinic gas feedstock comprising at least 2 mole % C2H4 and up to 40 wt.% 2-3C alkenes to hydrocarbon rich in 4C+ aliphatics and aromatics, comprises (a) maintaining a turbulent fluidised bed in a reactor operating at about 410 to 2500 kPa and 315-510 deg. C, the catalyst being a particulate zeolite of SiO2:Al2O3 mole ratio about 20:1 to 200:1, apparent particle density about 0.9-1.6 g/cc, size range and average catalyst particle size of about 20-100 microns, contg. about 10-25 wt.% of fine particles of size less than 32 microns; (b) passing hot light olefinic gas feedstock in the absence of added C3H8 up through the fluidised bed in a single pass under turbulent flow conditions, providing severity sufficient to convert at least about 70% of feedstock C2H4; (c) maintaining turbulent fluidised flow condition at a superficial feedstock velocity of about 0.3 to 2 m/s, the reactor bed having an average fluidised density at the bottom of the reaction zone of 300-500 kg/cu. m; and (d) recovering hydrocarbon prod. contg. a major amt. of 4C+ hydrocarbons, at least 6% isobutane, and C3H8 and C3H6 in ratio about 0.2:1 to 5:1.    USE/ADVANTAGE -   Esp. useful for upgrading FCC light gas, so increasing the gasoline yield of FCC units. Compared with a fixed bed reactor, the fluidised bed reactor has the advantage of continuous catalyst regeneration, and so will not be harmed by O-, S- and N-contg. contaminants in FCC fuel gas. The high isobutane yield is a significant advantage in isobutane-short refineries. The reaction temp. can be controlled by adjusting the feed temp.