Compositions – Leather or fur treating
Patent
1991-03-14
1992-09-01
Stoll, Robert L.
Compositions
Leather or fur treating
252 8551, 166268, 166273, 166274, 528 15, E21B 4322
Patent
active
051436329
ABSTRACT:
A polysiloxane polymer having pendant aromatic groups that is useful in increasing the viscosity of carbon dioxide. That polymer can be formed by reacting a polysiloxane containing at least one olefinic group with a phenyldialkylsilane. That polymer can be used in a method for recovering oil from an underground oil-bearing earth formation penetrated by an injection well and a producing well, in which method carbon dioxide is injected into the formation to displace oil towards the producing well from which oil is produced to the surface. The viscosity of the carbon dioxide injected into the formatin is increased at least three-fold by the presence of a sufficient amount of the polymer and a sufficient amount of a cosolvent to form a solution of the polymer in the carbon dioxide.
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Chevron Research and Technology Company
Keeling E. J.
Sayala C.
Schaal E. A.
Stoll Robert L.
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