Recovering tar from tar sand

Patent · Tue Apr 20 04:00:00 EST 1971

OSTI ID:5594023

Simpson, W C

A continuous process for removing tar sand includes (1) pneumatically passing a slurry of tar sand and solvent for the tar through a pipe as a series of slugs separated by slugs of a gas, (2) withdrawing liquid from each slug of slurry as it passes through a series of filtration zones and introducing liquid into each slug of slurry as it passes through a series of washing zones; and (3) recovering tar from the recovered liquid. The tubular continuous extractio device includes a tubular element having a series of alternate filtering and washing zones with means to regulate the pressure in the filtering zones to be successively diminishing in the direction of flow. (6 claims)

• Assignee: Shell Oil Co.
• Patent Number(s): US 3575842
• OSTI ID: 5594023
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
DISPERSIONS
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
MATERIALS
MIXTURES
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RECOVERY
SLURRIES
SOLUBILITY
SOLVENTS
SUSPENSIONS
TAR