Aerating tar sands-water mixture prior to settling in a gravity settling zone

Patent · Tue Jul 13 04:00:00 EDT 1976

OSTI ID:7214224

Anderson, J C; Davitt, H J

A hot water process for extracting bitumen from tar sands comprises forming a mixture of tar sands and water, settling the mixture in a primary extraction zone to form an upper bitumen froth layer, a middlings layer, and a sand tailings layer, passing a part of the middlings layer to an air scavenger zone to recover additional bitumen therefrom an improvement is made by aerating the mixture of tar sands and water before separating bitumen froth from the mixture in a gravity settling zone. This aeration can be accomplished by adding an aerated recycle middlings stream to the tar sands water-mixture prior to the settling step.

• Assignee: Great Canadian Oil Sands Ltd.
• Patent Number(s): US 3969220
• OSTI ID: 7214224
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
AIR
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COLLOIDS
DISPERSIONS
ENERGY SOURCES
FLUID INJECTION PROCESSES
FLUIDS
FOAMS
FOSSIL FUELS
FUELS
GASES
HOT-WATER PROCESSES
HYDROGEN COMPOUNDS
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RECOVERY
SEPARATION PROCESSES
TAR
WATER