CA1094484A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Flotation and centrifugation method for recovery of hydrocarbons from dilution centrifuging tailings
Assignee: Alberta Province Department of Energy and Natural Resources
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Filing: 1977-09-27
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Granted: 1981-01-27
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Expires: 1997-09-27
Abstract
Abstract "FLOTATION AND CENTRIFUGATION METHOD FOR RECOVERY OF HYDROCARBONS FROM DILUTION CENTRIFUGING TAILINGS" The invention has to do with treatment of dilution centrifuging tailings which are produced in connection with a hot water extraction operation for recovery of bitumen from oil sands. The tailings are subjected to induced gas flotation for a predetermined period of time to recover contained hydrocarbons as froth. The froth is then diluted with naphtha and centrifuged in two stages to recover most of the hydrocarbons in the froth as a processable product while rejecting solids and water.
Inventors
- 👤 Kenneth Porteous
- 👤 Stephen Lane
- 👤 Leigh Falkenberg
Bibliographic Details
Application Number
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Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-27 03:58
CPC Classifications
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Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
200 words
A method for treating tailings from the dilution centrifuging circuit of a hot water extraction complex for the recovery of bitumen from oil sands, said tail-ings containing bitumen, hydrocarbon diluent, solids and water, comprising: introducing the tailings into a flotation cell and retaining it therein for a sufficient period of time, while subjecting it to agitation and flotation using gas introduced into the base of the body of tailings, to recover a signifi-cant portion of the contained bitumen and diluent as froth and reject a portion of the solids and water as underflow; mixing the froth with a further portion of hydrocarbon diluent; treating the diluted froth in a scroll-type centrifugal separator to reject solids, water and a minor part of the hydrocarbons in the diluted froth as tailings, and pro-duce a first product stream comprising hydrocarbons, water and a minor part of the solids in the diluted froth; and treating the first product stream in a disc-type centrifugal separator to reject water, solids and a minor part of the hydrocarbons in the first product stream as tailings, and produce a second product stream comprising hydrocarbons and a minor part of the water and solids in the first product stream.
Claim 2
Independent Claim
200 words
A method for treating tailings from the dilution centrifuging circuit of a hot water extraction complex for the recovery of bitumen from oil sands, said tail-ings containing bitumen, hydrocarbon diluent, solids and water, comprising: introducing the tailings into a flotation cell and retaining it therein for a sufficient period of time, while subjecting it to agitation and flotation using gas introduced into the base of the body of tailings, to recover a signifi-cant portion of the contained bitumen and diluent as froth and reject a portion of the solids and water as underflow; mixing the froth with a further portion of hydrocarbon diluent; treating the diluted froth in a scroll-type centrifugal separator to reject solids, water and a minor part of the hydrocarbons in the diluted froth as tailings, and pro-duce a first product stream comprising hydrocarbons, water and a minor part of the solids in the diluted froth; and treating the first product stream in a disc-type centrifugal separator to reject water, solids and a minor part of the hydrocarbons in the first product stream as tailings, and produce a second product stream comprising hydrocarbons and a minor part of the water and solids in the first product stream.
Claim 3
Dependent Claim
20 words
The process of claim 1 in which the diluted froth has a diluent to bitumen weight ratio greater than 1Ø
References Cited (Backward Citations)
No citation records indexed.
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