PURPOSE: To efficiently prepare hydrogen and light oil, by catalytically cracking a sulfur-contg. heavy oil by use of a catalyst contg. at least 30% iron in the form of iron oxide at a plant consisting of the combination of a regeneration tower, cracking tower and calcining furnace.
CONSTITUTION: The first step: in a rengeneration tower 1, an oxidized catalyst supplied through a return pipe 5 and coated with a sulfur-contg. coke is contacted with an oxygen-contg. gas 4 at 750W950°C, converting the catalyst into the reduced state and a sulfur compd. in the coke into iron sulfide, and then introduced through a transfer pipe 7 to a cracking tower 2. The second step: in the cracking tower 2, surfur-contg. heavy oil 9 and steam 8 are contacted with the reduced catalyst at 500W800°C, and the produced light oil and hydrogen are recovered from exhaust gas 1 and most of the oxidized catalyst coated with the sulfur-contg. coke is fed to the regeneration tower 1. The third step: said catalyst is partially introduced through a transfer pipe 11 to a calcining tower 3 and contacted with an oxygen-contg. gas 12 to decompose the iron sulfide. Evolved SOx is recovered from the exhaust gas 12 and the catalyst is returned to the cracking tower 2.
INOUE YUKIO
AIZAWA SHIROU
ISHIBASHI YASUSHI
OOSE HIDETAKA
| JPS5747708A | 1982-03-18 |