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

1983-08-16

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208121, 208217, 252416, C10G 1104

Patent

active

043990231

ABSTRACT:
A process for simultaneously cracking 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 first 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: 2888395 (1959-05-01), Henny
patent: 3017250 (1962-01-01), Watkins
patent: 4126668 (1978-11-01), Erickson
patent: 4176084 (1979-11-01), Luckenbach
patent: 4224140 (1980-09-01), Fujimori et al.
patent: 4298460 (1981-11-01), Fujimori et al.
patent: 4325812 (1982-04-01), Fujimori et al.

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