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

Patent · Tue Dec 20 04:00:00 EST 1983

OSTI ID:6840472

Murakami, T; Aizawa, S; Inoue, Y; Suzuka, T

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/sup 0/ to 1,000/sup 0/ C. to effect roasting and gasification of iron sulfide in the catalyst.

• Assignee: Research Association for Residual Oil Processing, Tokyo, Japan
• Patent Number(s): US 4421635
• OSTI ID: 6840472
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
08 HYDROGEN
080102 -- Hydrogen-- Production-- Thermochemical Processes
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COKE
COMBUSTION
CRACKING
DECOMPOSITION
DEPOSITION
ELEMENTS
GASIFICATION
HYDROCARBONS
HYDROGEN PRODUCTION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
KINETICS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PYROLYSIS
REACTION KINETICS
REDUCTION
STEAM
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VISCOSITY