Förfarande för reduktion av svavelhalten i en flytande katalytiskt krackad petroleumfraktion, förfarande för katalytisk krackning i svävbädd samt fluidisebar katalysatorkomposition

• Main Authors: XINJIN ZHAO, ARTHUR W CHESTER, HYE KYUNG CHO TIMKEN, TERRY G ROBERIE, WUNG CHENG, SCOTT KEVIN PURNELL, MICHAEL S ZIEBARTH
• Format: Patent
• Language: Swedish
• Published: 06.04.2004
• Edition: 7
• Subjects: 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

The sulphur content of the liquid products from a catalytic cracking process is reduced by the use of a sulphur reduction catalyst comprising a porous molecular sieve which contains, with the interior pore structure of the sieve, (i) a first metal componet which has an oxidation state grater than zero, and (ii) a second metal component which comprises at least one rare earth metal. The molecular sieve is preferably a large-bore size zeolite such as a faujasite, for example, USY. The primary sulphur reduction component is normally a metal of Period 4 of the Periodic Table, preferably vanadium. The preferred rare earth metal is cerium, although lanthanum may be used alone or in combination with cerium. The sulphur reduction catalyst may be used in the form of separate particle additive or as part of a single combined/integrated cracking/sulphur catalyst.