Tar sand extraction process

Details Tar sand extraction process Tar sand extraction process

1979-09-12

1981-06-02

Leppink, James A.

Wells

Processes

Heating, cooling or insulating

166272, 166307, 208 11LE, E21B 4324, E21B 4327, C10G 100

Patent

active

042706092

ABSTRACT:
A method for separating and recovering bitumen from tar sand and other viscous petroleum deposits, either in situ or after mining the deposits. The method may also apply to heavy oil wells and to secondary and tertiary recovery of oils from wells. The tar sand is heated in an aqueous mixture of floating agent containing ammonia, a transfer agent containing a phosphate or silicate ion and a strong monovalent base. The bitumen rises to the surface of the mixture, without foaming or appreciable emulsification and will stay at the surface after cooling. Nearly clean sand remains in the bottom. Both an in situ separation technique and a process for recovering bitumen from mined tar sand are described using the aqueous mixture.

REFERENCES:
patent: 1497607 (1924-06-01), Streppel
patent: 1791797 (1931-02-01), Clark
patent: 3221813 (1965-12-01), Closmann et al.
patent: 3330757 (1967-07-01), Bichard
patent: 3331765 (1967-07-01), Canevari et al.
patent: 3556982 (1971-01-01), Kaminsky et al.
patent: 3858654 (1975-01-01), Walker
patent: 4019578 (1977-04-01), Terry et al.
patent: 4033412 (1977-07-01), Barrett
patent: 4034812 (1977-07-01), Widmyer

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