Recovery of hydrocarbons from tar sands

Patent · Tue Jul 10 04:00:00 EDT 1984

OSTI ID:6363952

Dente, M; Antonelli, L; Gallazzi, C

The process for the substantially total recovery of hydrocarbons from oil sands comprises: Preconditioning of the sands with diluent, possibly water (which may also be recycled from the process) and, preferably, with recycle extract; digestion of the homogeneous pulp, with (process) water; a first separation of the water-sand suspension from the hydrocarbon phase and from the digestion water; simultaneous washing and mixing of the solids separated from the bulk of the hydrocarbon phase in thick phase with overflowing water; a possible second separation of the dense solid mass from the excess liquid phase, the intermediate aqueous layer from the first separation (middlings) undergoing decantation and thickening and the solids so thickened undergoing centrifugation and stripping for the recovery of the limited proportions of diluent entrained with it. The equipment for this process consists of a preconditioner, a digestor, a first separator, a thick phase mixer, a possible second separator, a decanter-thickener, a centrifuge and a stripper, besides the possible apparatus for treating the diluted bitumen.

• Assignee: Ingeco International SA (Italy)
• Patent Number(s): US 4459200
• OSTI ID: 6363952
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
AQUEOUS SOLUTIONS
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CENTRIFUGATION
CHEMISTRY
CLEANING
DILUTION
DISPERSIONS
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
MIXING
MIXTURES
OIL SANDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RECYCLING
SAND
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TAR
WASHING
WATER CHEMISTRY