Recycle of secondary froth in the hot water process for extracting bitumen from tar sand

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United States of America Patent

PATENT NO 4776949
SERIAL NO

06804715

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Abstract

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Froth, produced by induced air flotation in the hot water process circuit for extracting bitumen from tar sand, is recycled and added to the fresh slurry being introduced to the primary separation vessel. An increase in bitumen recovered as primary froth from the circuit is produced.

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Patent Owner(s)

Patent OwnerAddress
ESSO RESOURCES CANADA LIMITED (25%)ESSO PLAZA 237 FOURTH AVENUE SOUTH WEST CALGARY ALBERTA T2P 0H6
ALBERTA ENERGY COMPANY LTD (10%)2400 639 - 5TH AVENUE SOUTH WEST CALGARY ALBERTA T2P 0M9
HBOG-OIL SANDS LIMITED PARTNERSHIP (5%)C/O DOME PETROLEUM LTD BOX 200 CALGARY ALBERTA T2P 2H8
PANCANADIAN PETROLEUM LIMITED (4%)P O BOX 2850 CALGARY ALBERTA T2P 2S5
CANADIAN OCCIDENTAL PETROLEUM LTD (13 23%)1500 635 - 8 AVENUE SOUTH WEST CALGARY ALBERTA T2P 3Z1
GULF CANADA LIMITED (9 03%)130 ADELAIDE STREET WEST TORONTO ONTARIO M5H 3R6
PETRO-CANADA INC (17%)P O BOX 2844 CALGARY ALBERTA T2P 3E3
HER MAJESTY THE QUEEN IN RIGHT OF THE PROVINCE OF ALBERTA AS REPRESENTED BY THE MINISTER OF ENERGY AND NATURAL RESOURCE (16 74%)1131 9945 - 108 STREET EDMONTON ALBERTA T5K 2G6

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kwong, Teddy K Edmonton, CA 1 11
Leung, Antony H S Sherwood Park, CA 3 110

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