| 摘要 |
<p>FLUIDIZED CATALYTIC CRACKING PROCESS The present invention involves an improved process and apparatus for the fluid catalytic cracking (FCC) of hydrocarbons. In such an invention, the output of a reactor riser zone is fed to a riser cyclone separator, a primary cyclone separator, and secondary cyclone separators, connected in series within a single reactor vessel. The riser cyclone separator is connected to the primary cyclone separator by a conduit, which prevents random post-riser thermal cracking of the hydrocarbons after they exit the riser cyclone separator. An opening in the conduit is provided to allow stripping gas to enter the conduit. Catalyst separated in the riser cyclone separator can drop through a riser cyclone dipleg and can then pass through a dipleg seal which comprises a seal pot or catalyst held around the dipleg. Steam may be directed into the riser cyclone separator to improve the separation of hydrocarbons from catalyst.</p> |
