FCC PROCESS COMBINING MOLECULAR SEPARATION WITH STAGED CONVERSION

• Main Authors: COOK, BRUCE, R, LOWENTHAL, STEVEN, S, SWAN, GEORGE, A., III, HENRY, B., ERIK
• Format: Patent
• Language: English; French
• Published: 05.10.2006
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; CRACKING HYDROCARBON OILS; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; MINERAL WAXES; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING

This invention relates to fluid catalytic cracking (FCC) process for improving the quality of distillates suitable as blend stocks for diesel fuels. The FCC process combines staging the FCC conversion process with interstage molecular separation of multi-ring aromatic species. Lower and higher severity reaction zones in the riser of the FCC reactor are combined with selective molecular separations to improve the production of diesel quality distillates. L'invention concerne un procédé de craquage catalytique fluide destiné à améliorer la qualité de distillats appropriés comme essence de base pour carburants diesel. Le procédé de craquage catalytique fluide selon l'invention combine la séparation par étages du procédé de craquage catalytique fluide avec la séparation moléculaire interétages d'espèces aromatiques à noyaux multiples. Des zones de réaction à taux de gravité faible et important dans la colonne de montée du réacteur de craquage catalytique fluide sont combinées à des séparations moléculaires sélectives afin d'améliorer la production de distillats de qualité diesel.