Delayed coking process with hydrotreated recycle

Patent · Tue Jul 22 04:00:00 EDT 1980

OSTI ID:5112552

Becraft, L; Kegler, W; Sooter, M

A delayed coking process is described in which a liquid hydrocarbonaceous premium coke feedstock selected from the group consisting of thermal tar, pyrolysis tar, decant oil from a catalytic cracking operating and mixtures thereof combined with petroleum resid in an amount of up to 50 weight percent is heated in a coker furnace and then fed to a delayed coking drum, and in which overhead vapors from said coking drum are passed to a coker fractionator where they are separated into light hydrocarbon products and recycle gas oil, and in which said recycle gas oil is combined with said feedstock and returned directly to said coking furnace, the improvement wherein said recycle gas oil is hydrotreated after being separated from said light hydrocarbon products and prior to being combined with said feedstock and returned directly to said coking furnace and wherein the coke product from said delayed coking drum has a cte of less than 5.0x10/sup -7//sup 0/C.

• Assignee: Conoco Inc
• Patent Number(s): US 4213846
• OSTI ID: 5112552
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401 -- Coal & Coal Products-- Carbonization-- (-1987)
010500* -- Coal
Lignite
& Peat-- Products & By-Products
CARBONACEOUS MATERIALS
CARBONIZATION
CATALYTIC CRACKING
CHEMICAL REACTIONS
COAL
COAL TAR
COKE OVENS
COKING
CRACKING
DECOMPOSITION
ENERGY SOURCES
EXPANSION
FOSSIL FUELS
FRACTIONATION
FUELS
GAS OILS
MATERIALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYROLYSIS
PYROLYSIS PRODUCTS
RECYCLING
SEPARATION PROCESSES
TAR
THERMAL EXPANSION
THERMOCHEMICAL PROCESSES