E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/17
E21B 43/22 (2006.01) C09K 8/88 (2006.01)
Patent
CA 1272875
Abstract: Sacrificial agents employed in methods of obtaining oil from rock formations by surfactant flooding comprising oxidized and/or chlorinated lignin and lignin-like deriv- atives obtained from inexpensive and readily available sources. In one form of the invention such derivatives present in E-stage wood pulp bleach plant effluent are concentrated by the use of macroporous resins, reverse osmosis or membrane dialysis. In another form of the invention, new sources of the derivatives are provided from forest industry by-products. In a further form of the invention, the derivatives are complexed with iron which significantly improves the sacrificial agent activity of the derivatives. Such sacrificial agents reduce the amount of expensive surfactant required in the oil recovery method.
504259
Howard John
Stirling Marie
Canadian Patents And Development Limited/societe Canadienne Des
Kirby Eades Gale Baker
LandOfFree
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