Liquefaction of decarboxylated carbonaceous solids

Patent · Tue Jul 20 00:00:00 EDT 1993

OSTI ID:6431762

Scouten, C G; Basu, A; Joseph, J T

A coal agglomeration process is described, comprising the steps of: (a) heating a composition consisting essentially of coal containing at least one carboxyl group with subcritical liquid water at conditions sufficient to substantially decarboxylate said coal including a temperature of at least about 300 F in the presence of sulfurous acid, thereby producing a decarboxylated coal stream; (b) agglomerating said decarboxylated coal stream by contacting said decarboxylated stream with a coal-derived liquid to form a two-phase mixture comprising an organic phase comprising coal agglomerates and a mineral-rich aqueous phase, and separating said organic phase from said aqueous phase, thereby producing decarboxylated, demineralized coal; (c) hydroliquefying said decarboxylated, demineralized coal to produce a coal-derived liquid; and (d) recycling a portion of said coal-derived liquid to step (b).

• Assignee: Amoco Corp., Chicago, IL (United States)
• Patent Number(s): US 5228982; A
• Application Number: PPN: US 7-689192
• OSTI ID: 6431762
• Resource Relation: Patent File Date: 22 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
DECARBOXYLATION
DEMINERALIZATION
HYDROGENATION
COAL LIQUIDS
PRODUCTION
AGGLOMERATION
COAL LIQUEFACTION
RECYCLING
SEPARATION PROCESSES
SULFUROUS ACID
WATER
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LIQUEFACTION
LIQUIDS
MATERIALS
OXYGEN COMPOUNDS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction