Recovery of a carbonaceous liquid with a low fines content

Patent · Tue Oct 13 04:00:00 EDT 1987

OSTI ID:5782086

Peck, L

This patent describes a method for removing solid fines in an extraction of bitumen from a carbonaceous solid or carbonaceous liquid containing extractable bitumen and solid fines comprising: (a) contacting the carbonaceous solid or carbonaceous liquid containing extractable bitumen with a solvent mixture having a solubility parameter between about 8.5 and about 10.5 to produce a bitumen laden solvent mixture. The solvent mixture comprises at least one solvent with a solubility parameter higher than that of of bitumen and at least one solvent with a solubility parameter lower than that of bitumen. (b) separating sand from the bitumen laden solvent mixture; (c) treating the bitumen laden solvent mixture to remove the lower solubility parameter solvent so that an asphaltene fraction of the bitumen is precipitated from the remaining solvent to form a mixture comprising dissolved bitumen, undissolved asphaltenic bitumen, solid fines, and solvent; (d) permitting the undissolved asphaltenic bitumen to settle with at least a portion of the solid fines, agglomerating and settling with the undissolved asphaltenic bitumen; (e) separating the undissolved bitumen and solid fines; and (f) stripping the remaining solvent from the dissolved bitumen to produce product bitumen.

• Assignee: Amoco Corp., Chicago, IL
• Patent Number(s): US 4699709
• OSTI ID: 5782086
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
AGGLOMERATION
ASPHALTENES
ASPHALTS
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
DISPERSIONS
DISSOLUTION
ENERGY SOURCES
EXTRACTION
FLUIDS
FOSSIL FUELS
FUELS
LIQUIDS
MATERIALS
MIXTURES
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PRECIPITATION
PROCESS SOLUTIONS
RECOVERY
SEPARATION PROCESSES
SOLIDS
SOLUTES
SOLUTIONS
SOLVENT EXTRACTION
TAR