Fluidized bed gasification of extracted coal

Patent · Wed Jan 01 04:00:00 EST 1986

OSTI ID:865942

Aquino, Dolores C ^[1]; DaPrato, Philip L ^[2]; Gouker, Toby R ^[3]; Knoer, Peter ^[1]

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1. Houston, TX
2. Westfield, NJ
3. Baton Rouge, LA

Coal or similar carbonaceous solids are extracted by contacting the solids in an extraction zone (12) with an aqueous solution having a pH above 12.0 at a temperature between 65.degree. C. and 110.degree. C. for a period of time sufficient to remove bitumens from the coal into said aqueous solution and the extracted solids are then gasified at an elevated pressure and temperature in a fluidized bed gasification zone (60) wherein the density of the fluidized bed is maintained at a value above 160 kg/m.sup.3. In a preferred embodiment of the invention, water is removed from the aqueous solution in order to redeposit the extracted bitumens onto the solids prior to the gasification step.

• Research Organization: Exxon Research and Engineering Co
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4604105
• OSTI ID: 865942
• Country of Publication: United States
• Language: English

Related Subjects

/48/
110
12
160
60
65
aqueous
aqueous solution
bed
bed gasification
bitumens
carbonaceous
carbonaceous solid
carbonaceous solids
coal
contacting
degree
density
elevated
elevated pressure
embodiment
extracted
extracted coal
extraction
extraction zone
fluidized
fluidized bed
gasification
gasification zone
gasified
kg
maintained
period
ph
preferred
preferred embodiment
pressure
prior
redeposit
remove
removed
similar
similar carbonaceous
solids
solution
step
sufficient
temperature
time
time sufficient
value
water
zone