CO.sub.2 gels and methods for making

Details CO.sub.2 gels and methods for making CO.sub.2 gels and methods for making

1988-11-22

1990-05-01

Terapane, John F.

Compositions

Preservative agents

Anti-corrosion

252 8551, 252 8554, B01J 1300, E21B 4322

Patent

active

049216350

ABSTRACT:
A method for increasing the viscosity of CO.sub.2 comprising the steps of: mixing semi-fluorinated alkane and liquid CO.sub.2 ; and venting CO.sub.2 vapor from the liquid CO.sub.2 until the liquid CO.sub.2 becomes supersaturated. A gel that comprises a semi-fluorinated alkane; and liquid CO.sub.2. The semi-fluorinated alkane is of the form (F.sub.3 C)--(CF.sub.2).sub.N-1-(CH.sub.2).sub.M-1 -(CH.sub.3).

REFERENCES:
patent: 4607696 (1986-08-01), Heller et al.
Twieg, R. J. et al., "Observation of a Gel Phase in Binary Mixtures of Semifluorinated Alkanes", Macromolecules, vol. 18, (1985), p. 1361.
Rabolt, J. F. et al., "Structural Studies of Semifluorinated n-Alkanes . . . ", Macromolecules, vol. 17, (1984), pp. 2786-2794.
Chem. Abs., vol. 109, No. 12, abs. #95638v, Dandge, D. K. et al., in Prepr. Am. Chem. Soc., Div. Pet. Chem., 33(1), 125-8, (1988).

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