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

Patent · Fri Jan 01 00:00:00 EST 1982

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for steady state operation of the liquefaction process a portion of the solvent or diluent distillated fraction will be withdrawn as product.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

liquefaction
process
solvents
derived
material
liquefied
containing
increased
concentrations
donor
species
employed
improved
solid
carbonaceous
materials
solvent
diluent
form
slurry
comprises
65
85
wt
hydroaromatic
components
prepared
separating
distillate
fraction
product
subjecting
hydrogenation
extracting
naphthenic
hydrogenated
extracted
dehydrogenated
hydrotreated
produce
additional
combined
contain
constituents
heavy
naphtha
dehydrogenating
hydrotreating
amount
produced
manner
exceeds
required
steady
operation
portion
distillated
withdrawn
improved process
carbonaceous materials
liquefaction process
carbonaceous material
solid carbonaceous
solid carbon
distillate fraction
produce additional
liquefaction product
increased concentration
increased concentrations
donor species
diluent derived
/208/