Coal as an additive to accelerate thermal cracking in coking

Patent · Tue Jul 20 04:00:00 EDT 1993

OSTI ID:6297435

Olmstead, M N; Bearden, R Jr

A process is described for converting heavy hydrocarbonaceous feedstocks to lower boiling products, which process comprises: (a) forming a mixture of the hydrocarbonaceous feedstock and up to about 10 wt. % coal, based on the total weight of feedstock and coal, (b) heating the mixture to a temperature from about 500 F to about 700 F from 30 minutes to 2 hours; (c) passing the mixture to a coking zone comprised of a bed of fluidized solids maintained at fluid coking conditions, including temperatures from about 850 F to 1,200 F, thereby producing a vapor phase product including normally liquid hydrocarbons, and coke, said coke depositing on the fluidized solids; (d) introducing a portion of said solids, with coke deposited thereon, into a heating zone comprised of a fluidized bed of solid particles and operated at a temperature greater than said coking zone, and in which the fluidizing gas is a mixture of steam and an oxygen-containing gas; and (e) recycling a portion of said heated solids from said heating zone to said coking zone.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ (United States)
• Patent Number(s): US 5228981; A
• Application Number: PPN: US 7-870165
• OSTI ID: 6297435
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
02 PETROLEUM
020400* -- Petroleum-- Processing
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
COAL
COKE
COKING
CONCENTRATION RATIO
COPROCESSING
DECOMPOSITION
DISPERSIONS
ENERGY SOURCES
FLUIDIZED BEDS
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROCARBONS
MATERIALS
MIXTURES
ORGANIC COMPOUNDS
PETROLEUM
PROCESSING
PRODUCTION
PYROLYSIS PRODUCTS
PYROLYTIC GASES
RECYCLING
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
VISCOSITY