Two-stage catalytic hydroconversion of hydrocarbon feedstocks using resid recycle

Patent · Tue Jul 03 04:00:00 EDT 1984

OSTI ID:6483341

Gendler, J L

A two-stage catalytic hydroconversion process is claimed for heavy hydrocarbon feedstocks usually containing fine particulate solids to produce lower boiling hydrocarbon liquid and gas products. The feedstock is fed into a first stage ebullated bed reactor containing fine sized catalyst and operated at moderate reaction conditions for hydroconversion to produce hydrocarbon gas and liquid fractions, from which a low boiling liquid fraction is separated and withdrawn as a product. The remaining gas and heavier liquid fractions are recombined and fed to a second stage ebullated bed reactor containing larger size catalyst for further hydroconversion reactions at less severe conditions to produce lower boiling hydrocarbon liquid fractions. Following product distilation steps, liquid product fractions are withdrawn and a portion of vacuum bottoms material is recycled to the second stage reactor to provide increased hydroconversion and improved yields of the light hydrocarbon liquid product.

• Assignee: HRI, Inc.
• Patent Number(s): US 4457831
• OSTI ID: 6483341
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL LIQUEFACTION
COAL LIQUIDS
CRACKING
DECOMPOSITION
DESULFURIZATION
DISTILLATION
ENERGY SOURCES
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUELS
HYDROCRACKING
LIQUEFACTION
LIQUIDS
PARTICLE SIZE
PETROLEUM
PETROLEUM FRACTIONS
PYROLYSIS
SEPARATION PROCESSES
SIZE
THERMOCHEMICAL PROCESSES
TSL PROCESS
VISCOSITY
YIELDS