Process for simultaneously cracking heavy hydrocarbons into ligh

Details Process for simultaneously cracking heavy hydrocarbons into ligh Process for simultaneously cracking heavy hydrocarbons into ligh

1982-02-12

1983-12-20

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208121, 502 38, C10G 4704, C10G 1104

Patent

active

044216351

ABSTRACT:
A process for simultaneously cracking a heavy hydrocarbons to form light oil and producing hydrogen is described, which comprises (1) a first step wherein steam and heavy hydrocarbons are simultaneously contacted with a catalyst in a reduced state, containing iron in the form of iron oxide, to produce hydrogen, cracked gases and cracked light oils, to convert the reduced-state catalyst into an oxidized-state catalyst, and to deposit coke on the catalyst, (2) a second step wherein the oxidized-state catalyst with coke deposited thereon is contacted with an oxygen-containing gas to partially combust the coke on the catalyst, to convert the oxidized-state catalyst into a reduced-state catalyst, and to fix a sulfur compound contained in the coke as iron sulfide with a part of the reduced-state catalyst; and (3) a third step wherein catalyst obtained from the second step, the major portion of the catalyst being recycled between the first step and second step, is contacted with an oxygen-containing gas at a temperature of from 600.degree. to 1,000.degree. C. to effect roasting and gasification of iron sulfide in the catalyst.

REFERENCES:
patent: 2694622 (1954-11-01), Reed et al.
patent: 4298460 (1981-11-01), Fujimori et al.
patent: 4308173 (1981-12-01), Fujimori et al.
patent: 4325812 (1982-04-01), Fujimori et al.
patent: 4334920 (1982-06-01), Mori et al.

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