NOVELTY - Hydrocarbons are processed by providing stream of olefins (12) including normal olefins and non-normal olefins, separating normal olefins from non-normal olefins to form stream (32) of normal olefins, polymerizing stream of normal olefins to form stream of polymerized normal olefins, and saturating stream of polymerized normal olefins to form a stream (52) of normal paraffins.    USE - Processing of hydrocarbons.    ADVANTAGE - Production of valuable product streams is enhanced. Spent catalyst can be regenerated and reused in the process. Propylene production of fluid catalytic cracking unit operating as upstream processing unit can be increased by recycling the stream back into the feedstock.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) processing of hydrocarbons which involves introducing stream of mixed 4 carbon-containing olefins to reaction zone (20), converting portion of stream of mixed 4 carbon-containing olefins to 5 carbon-containing species, separating 5 carbon-containing species from unconverted 4 carbon-containing olefins, polymerizing unconverted 4 carbon-containing olefins to form 8 carbon-containing olefins, and saturating 8 carbon-containing olefins to form 8 carbon-containing paraffins; and    (2) apparatus (10) for processing hydrocarbons comprising separation zone (24) to receive stream of olefins including normal olefins and non-normal olefins and separate normal olefins from non-normal olefins to form stream of normal olefins, polymerization zone (40) to polymerize stream of normal olefins to form stream of polymerized normal olefins, and saturation zone (50) to saturate stream of polymerized normal olefins to form stream of normal paraffins.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the apparatus for processing hydrocarbons.    Apparatus for hydrocarbon processing (10)    Olefin stream (12)    Reaction zone (20)    Separating zone (24)    Stream of normal olefins (32)    Polymerization zone (40)    Saturation zone (50)    Normal paraffin stream (52)