05968349 is referenced by 370 patents and cites 4 patents.

A process for the extraction of bitumen from bitumen froth generated from tar sands is disclosed. In this process, bitumen froth is extracted from tar sands using a water process without requiring the use of caustic soda. The froth is treated in a counter-current decantation circuit with a paraffinic solvent to remove precipitated asphaltenes, water, and solids from the bitumen froth. A dilute bitumen product is produced having final water and solids contents of about 0.01 to about 1% by weight. This renders the dilute bitumen product amenable to direct hydrocracking. The process provides an alternative route to the conventional process of utilizing centrifuges to separate bitumen from precipitated asphaltenes, water, and solids and thus avoids the high capital and operating costs associated with the conventional bitumen froth treatment by centrifugation. The invention utilizes bitumen froth produced from a water process in which the use of caustic soda is not required. The process advantageously avoids the production of tailings sludges caused by clay dispersions. The present invention also teaches a novel process for the biotreatment of bitumen froth tailings resulting in a reduced amount of waste products and waste byproducts.

Title
Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands
Application Number
9/192892
Publication Number
5968349
Application Date
November 16, 1998
Publication Date
October 19, 1999
Inventor
Merijn Amilcare Picavet
Delft
NL
Julia Rose Budden
Reno
NV, US
Willem P C Duyvesteyn
Reno
NV, US
Agent
Hopgood Calimafde Kalil & Judlowe
Assignee
BHP Minerals International
NV, US
IPC
C10G 32/00
C10G 1/04
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