Exothermic hydrocarbon conversion system utilizing heat exchange between reactor effluent fractionation system and feedstock.

摘要

A continuous catalytic system for converting olefins to gasoline or distillate range hydrocarbons wherein a continuous liquid olefinic feedstream is diluted with a liquid gasoline and/or lower alkane steam. The improved technique provides methods and means for (a) fractionating converted reactor effluent to obtain a condensed lower aliphatic stream and a liquid stream consisting essentially of C5<+> hydrocarbons; (b) further fractionating the C5<+> liquid stream to recover a distillate range liquid product and a gasoline range splitter overhead vapor stream; (c) recycling at least a portion of the condensed lower aliphatic stream under pressure for dilution of the olefinic feedstream; and (d) recovering waste heat from splitter overhead vapor by thermal transfer to heat at least a portion of the condensed lower aliphatic stream and the olefinic feedstream under super-atmospheric pressure.