Donor solvent coal liquefaction with bottoms recycle at elevated pressure
Patent
·
OSTI ID:864322
- Houston, TX
- Seabrook, TX
- Baytown, TX
- Friendswood, TX
An improved process for liquefying solid carbonaceous materials wherein increased naphtha yields are achieved by effecting the liquefaction at a pressure within the range from about 1750 to about 2800 psig in the presence of recycled bottoms and a hydrogen-donor solvent containing at least 0.8 wt % donatable hydrogen. The liquefaction is accomplished at a temperature within the range from about 700.degree. to about 950.degree. F. The coal:bottoms ratio in the feed to liquefaction will be within the range from about 1:1 to about 5:1 and the solvent or diluent to total solids ratio will be at least 1.5:1 and preferably within the range from about 1.6:1 to about 3:1. The yield of naphtha boiling range materials increases as the pressure increases but generally reaches a maximum at a pressure within the range from about 2000 to about 2500 psig.
- Research Organization:
- Exxon Research and Engineering Co. (Florham Park, NJ)
- Assignee:
- Exxon Research & Engineering Co. (Florham Park, NJ)
- Patent Number(s):
- US 4347117
- OSTI ID:
- 864322
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/208/
1750
2000
2500
2800
700
950
accomplished
achieved
boiling
boiling range
bottoms
carbonaceous
carbonaceous material
carbonaceous materials
coal
coal liquefaction
containing
degree
diluent
donatable
donor
donor solvent
effecting
elevated
elevated pressure
feed
hydrogen
hydrogen-donor
hydrogen-donor solvent
improved
improved process
increased
increased naphtha
increases
liquefaction
liquefying
liquefying solid
materials
maximum
naphtha
naphtha yields
preferably
presence
pressure
pressure increase
pressure increases
process
psig
range
ratio
reaches
recycle
recycled
solid
solid carbon
solid carbonaceous
solids
solvent
solvent coal
solvent containing
temperature
total
total solids
wt
yield
yields
1750
2000
2500
2800
700
950
accomplished
achieved
boiling
boiling range
bottoms
carbonaceous
carbonaceous material
carbonaceous materials
coal
coal liquefaction
containing
degree
diluent
donatable
donor
donor solvent
effecting
elevated
elevated pressure
feed
hydrogen
hydrogen-donor
hydrogen-donor solvent
improved
improved process
increased
increased naphtha
increases
liquefaction
liquefying
liquefying solid
materials
maximum
naphtha
naphtha yields
preferably
presence
pressure
pressure increase
pressure increases
process
psig
range
ratio
reaches
recycle
recycled
solid
solid carbon
solid carbonaceous
solids
solvent
solvent coal
solvent containing
temperature
total
total solids
wt
yield
yields