Fischer tropsch composition and process

摘要

A process for the production of an upgraded synthetic gasoline is disclosed which comprises (a) contacting the synthesis gas stream at an elevated temperature and pressure with a Fischer-Tropsch catalyst in a Fischer-Tropsch reactor to generate a hydrocarbon product stream comprising hydrocarbons having a chain length of between 1 to 30 carbon atoms, (b) passing at least a portion of the hydrocarbon product stream to a cracking reactor wherein the hydrocarbon product stream is contacted with a cracking catalyst under conditions which provide a synthetic gasoline stream consisting essentially of hydrocarbons having a chain length of between 1 to 12 carbon atoms, (c) separating the synthetic gasoline stream produced in step (b) to provide at least one stream comprising hydrocarbons containing less than 6 carbon atoms and at least one stream comprising hydrocarbons containing at least 6 carbon atoms, (d) passing the stream comprising hydrocarbons containing less than 6 carbon atoms to an oxygenating reactor wherein it is reacted with oxygenates to produce a stream comprising ethers, and (e) blending at least a portion of the stream comprising ethers with the stream comprising hydrocarbons containing at least 6 carbon atoms to produce an upgraded synthetic gasoline.