Process for reducing sludge accumulation in the hot water extrac

Details Process for reducing sludge accumulation in the hot water extrac Process for reducing sludge accumulation in the hot water extrac

1994-10-06

1996-02-20

Hruskoci, Peter A.

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

208391, 210697, 210710, 210712, 210747, C02F 152

Patent

active

054926289

ABSTRACT:
A dispersant, such as sodium silicate, is added to the process water of the hot water extraction process which recovers bitumen from oil sands. The dispersant disperses the ultrafine (less than 300 nm) particles, to reduce the formation of flocs and sludge in the tailings pond. The volume of the pond is such that the retention time of process water is sufficiently short (less than 6 weeks when using sodium silicate) to avoid reforming flocs from the dispersed ultrafines. The ultrafines content in the process water builds up as the water is repeatedly recycled from the pond to the extraction process. The ultrafines content stabilizes at a steady state concentration as some ultrafines are continuously removed from the process water when the tailings are delivered onto the "beach" of the pond and become trapped in the sand.

REFERENCES:
patent: 2980600 (1961-04-01), Kelley
patent: 3401110 (1968-09-01), Floyd et al.
patent: 3526585 (1970-09-01), Camp
patent: 3931006 (1976-01-01), Baillie et al.
patent: 3953318 (1976-04-01), Baillie et al.
patent: 4201656 (1980-05-01), Sanford
patent: 4425227 (1984-01-01), Smith
patent: 4486294 (1984-12-01), Miller et al.
P. V. Rosewame and A. A. Swinnerton--Report of laboratory investigation of the cold water separation of bitumen from Alberta bituminous sand--1948.

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