Manufacture of distillate hydrocarbons from light olefins in staged reactors

Abstract From the Canadian patent

A semi-continuous multi-stage catalytic technique for converting lower olefinic feedstock to heavier liquid hydrocarbon product. The invention provides methods and means for: a) contacting alkene-rich feedstock at high space velocity elevated temperature in a continuous primary stage reaction zone with shape selective medium pore zeolite oligomerization catalyst particles to convert at least a portion of the lower olefinic components to intermediate olefinic hydrocarbons, said primary stage catalyst having an average acid cracking activity of about 0.1 to 20; b) cooling primary stage oligomerization reaction effluent from the primary stage reaction zone to condense at least a portion of the …