Method for reducing mineral content of sludge

Patent · Tue Apr 19 04:00:00 EST 1977

OSTI ID:6901267

Bain, F A; Roberts, J O.L.

A process is described for treating retention pond sludge containing greater than 20% solids, including minerals and bitumen associated with the aqueous extraction of oil from tar sands. The process substantially reduces the solids content of the water. The process consists of (1) agitating the sludge with water to provide a diluted sludge with a solids concentration in the range of 6 to 18% by wt, (2) thereafter settling the sludge to form a lower layer having a solids content substantially higher than that of the sludge, an upper layer of bituminous froth, and a middle layer of water having a substantially lower solids content than the undiluted sludge, and (3) recovering the upper layer. (4 claims)

• Assignee: Gr. Canadian Oil Sands Ltd.
• Patent Number(s): US 4018664
• OSTI ID: 6901267
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040900* -- Oil Shales & Tar Sands-- Waste management
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
DEMINERALIZATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
INDUSTRIAL PLANTS
MANAGEMENT
MATERIALS
MINERALS
OIL SAND PROCESSING PLANTS
OIL SANDS
PROCESSING
REMOVAL
SEPARATION PROCESSES
SLUDGES
WASTE MANAGEMENT
WASTE PROCESSING