Fluid catalytic cracking feedstock injection process

The invention is a method for mixing feedstock with fluidized catalyst in a fluid catalytic cracking (FCC) riser reactor. A dispersed catalyst suspension is passed upwardly at a velocity of 0.15 to 1.22 m/sec (0.5 to 4 ft/sec). Atomized feedstock is injected downwardly at a velocity relative to the...

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Bibliographische Detailangaben
Hauptverfasser:	DACH, MICHAEL MARKEL, CHAN, HENRY CHOISUN CHAN, CHAN, TING YEE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS METALLURGY MINERAL WAXES 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 TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention is a method for mixing feedstock with fluidized catalyst in a fluid catalytic cracking (FCC) riser reactor. A dispersed catalyst suspension is passed upwardly at a velocity of 0.15 to 1.22 m/sec (0.5 to 4 ft/sec). Atomized feedstock is injected downwardly at a velocity relative to the catalyst velocity of -9 to -305 m/sec (-30 to -1000 ft./sec) to produce a turbulently mixed reaction suspension. Vaporizing feedstock rapidly accelerates the reaction suspension in approximately plug flow. The slip factor between catalyst and hydrocarbon in the reaction suspension defining the departure from ideal plug flow is thereby reduced.