Method for processing a diluted oil sand froth

Details Method for processing a diluted oil sand froth Method for processing a diluted oil sand froth

B - Operations, Transporting

03

B

B03B 9/02 (2006.01) B01D 17/00 (2006.01) B03B 5/02 (2006.01) B03D 1/08 (2006.01) C10G 1/04 (2006.01)

Patent

CA 2200899

A method for processing an oil sand froth that is withdrawn as an underflow stream (5) from a primary bitumen froth separation vessel (4) comprises the steps of vigorously agitating the underflow in an agitating tank (6) at such a shear level that agglomerates of asphaltenes and clays are formed whilst redispersion of the thus formed agglomerates remains limited and separating said agglomerates as a middlings stream (9) from the other components e.g. in a secondary separation vessel (7) in which the froth is gently agitated.

Méthode pour traiter une écume de sable bitumineux, retirée sous forme de flux de sous-écoulement (5) à partir d'une cuve (4) de séparation primaire de l'écume de bitume. La méthode consiste à agiter énergiquement le sous-écoulement dans une cuve (6), avec un taux de cisaillement permettant d'agglomérer les asphaltènes et les argiles tout en limitant la redispersion des agglomérés ainsi formés, et de séparer ces derniers, sous forme de flux de mixtes (9), des autres constituants, p. ex. dans une cuve de séparation secondaire (7), dans laquelle l'écume est légèrement agitée.

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