Process for simultaneously cracking heavy hydrocarbons into light oils and producing hydrogen

Patent · Tue Aug 16 04:00:00 EDT 1983

OSTI ID:5674723

Suzuka, T; Aizawa, S; Inoue, Y; Ishibashi, Y; Ohwe, H

A process is disclosed for simultaneously cracking heavy hydrocarbons to form light oil and produce 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, and to deposit coke on the catalyst, (2) a second step wherein the oxidized-state cataly 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 sulfur compound contained in the coke as iron sulfide with a part of the reduced-state catalyst; a (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 a temperature of from 600/sup 0/ to 1,000/sup 0/ C. to effect roasting and gasification of iron sulfide the catalyst.

• Assignee: Research Association for Residual Oil Processing (Japan)
• Patent Number(s): US 4399023
• OSTI ID: 5674723
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
08 HYDROGEN
080108 -- Hydrogen-- Production-- Steam-Iron Process
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN PRODUCTION
IRON COMPOUNDS
IRON OXIDES
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PYROLYSIS
REDOX REACTIONS
STEAM
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS