Method for treating oil sands extraction plant tailings

Details Method for treating oil sands extraction plant tailings Method for treating oil sands extraction plant tailings

1982-04-23

1984-03-20

Hart, Charles N.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210731, 210803, 210901, 208 11LE, C02F 154, C08L 302

Patent

active

044379986

ABSTRACT:
Tailings from an oil sands hot water process extraction plant are mixed with hydrolyzed starch flocculant and transferred to a settling pond. After a residence period on the order of one year, sludge from the lower region of the settling pond is withdrawn, mixed with a hydrolyzed starch dewatering agent and transferred to a collecting pond. After a residence period on the order of one week, partially dewatered sludge is withdrawn, mixed with sand, and deposited in a terminal disposal area, the sand in the mixture there effecting an internal surcharge to obtain further dewatering. The hydrolyzed starch additives are obtained by the aqueous hydrolysis of a starch in the presence of one or more metal salts.

REFERENCES:
patent: 3931006 (1976-01-01), Baillie et al.
patent: 3953318 (1976-04-01), Baillie et al.
patent: 3962079 (1976-06-01), Hunt et al.
patent: 4008146 (1977-02-01), Bain et al.
patent: 4018664 (1977-04-01), Bain et al.
patent: 4036752 (1977-07-01), Lassiter
patent: 4289540 (1981-09-01), Yong et al.

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