Hydrothermal pretreatment to prevent scale during liquefaction of certain solid carbonaceous materials
Patent
·
OSTI ID:865016
- Houston, TX
- Baytown, TX
Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by hydrothermal pretreatment. The said pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The said pretreatment is accomplished at a total pressure within the range from about 1000 to about 4400 psia. Temperature during said pretreatment will generally be within the range from about 500.degree. to about 700.degree. F.
- Research Organization:
- Exxon Research and Engineering Co. (Florham Park, NJ)
- Assignee:
- Exxon Research and Engineering Co. (Florham Park, NJ)
- Patent Number(s):
- US 4450066
- OSTI ID:
- 865016
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/208/
1000
4400
500
700
accomplished
believed
carbonaceous
carbonaceous material
carbonaceous materials
carbonate
coals
components
convert
corresponding
corresponding carbonate
degree
formation
hydrothermal
liquefaction
materials
pressure
pretreatment
prevent
prevent scale
prevented
prior
psia
range
ranking
ranking coals
reduced
scale
scale formation
scale-forming
scale-forming components
significantly
significantly reduce
significantly reduced
similar
similar carbonaceous
solid
solid carbon
solid carbonaceous
temperature
total
total pressure
1000
4400
500
700
accomplished
believed
carbonaceous
carbonaceous material
carbonaceous materials
carbonate
coals
components
convert
corresponding
corresponding carbonate
degree
formation
hydrothermal
liquefaction
materials
pressure
pretreatment
prevent
prevent scale
prevented
prior
psia
range
ranking
ranking coals
reduced
scale
scale formation
scale-forming
scale-forming components
significantly
significantly reduce
significantly reduced
similar
similar carbonaceous
solid
solid carbon
solid carbonaceous
temperature
total
total pressure