Liquefaction process wherein solvents derived from the material liquefied and containing increased concentrations of donor species are employed

Patent · 31 December 1981

OSTI ID:864106

Fant, B T ^[1]; Miller, John D ^[2]; Ryan, D F ^[3]

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1. Kingwood, TX
2. Baytown, TX
3. Friendswood, TX

An improved process for the liquefaction of solid carbonaceous materials wherein a solvent or diluent derived from the solid carbonaceous material being liquefied is used to form a slurry of the solid carbonaceous material and wherein the solvent or diluent comprises from about 65 to about 85 wt. % hydroaromatic components. The solvent is prepared by first separating a solvent or diluent distillate fraction from the liquefaction product, subjecting this distillate fraction to hydrogenation and then extracting the naphthenic components from the hydrogenated product. The extracted naphthenic components are then dehydrogenated and hydrotreated to produce additional hydroaromatic components. These components are combined with the solvent or diluent distillate fraction. The solvent may also contain hydroaromatic constituents prepared by extracting naphthenic components from a heavy naphtha, dehydrogenating the same and then hydrotreating the dehydrogenated product. When the amount of solvent produced in this manner exceeds that required for steady state operation of the liquefaction process a portion of the solvent or diluent distillated fraction will be withdrawn as product.

• Research Organization: Exxon Research and Engineering Co.
• DOE Contract Number: EF-77-A-01-2893
• Assignee: Exxon Research & Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4311578
• OSTI ID: 864106
• Country of Publication: United States
• Language: English

Related Subjects

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65
85
additional
amount
carbonaceous
carbonaceous material
carbonaceous materials
combined
components
comprises
concentrations
constituents
contain
containing
dehydrogenated
dehydrogenating
derived
diluent
diluent derived
distillate
distillate fraction
distillated
donor
donor species
employed
exceeds
extracted
extracting
form
fraction
heavy
hydroaromatic
hydrogenated
hydrogenation
hydrotreated
hydrotreating
improved
improved process
increased
increased concentration
increased concentrations
liquefaction
liquefaction process
liquefaction product
liquefied
manner
material
materials
naphtha
naphthenic
operation
portion
prepared
process
produce
produce additional
produced
product
required
separating
slurry
solid
solid carbon
solid carbonaceous
solvent
solvents
species
steady
subjecting
withdrawn
wt