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- W149407529 abstract "Laboratory data are used to show that commercial polyacrylamides hydrolyze to an equilibrium degree which depends on the temperature of hydrolysis, but is largely independent of the brine composition. In brines containing large amounts of sodium chloride, but less than 20 ppm total hardness, polyacrylamides appear to be indefinitely stable, at least at temperatures up to 204/sup 0/C (400/sup 0/F). At hardness levels greater than this, polyacrylamide solutions pass through a sharp cloud point as their temperature is raised. This cloud point temperature depends primarily on the hardness level of the brine and the degree of hydrolysis of the polymer, with lesser dependency on polymer molecular weight and polymer concentration. Indications are that these cloudy solutions cause plugging of porous media. Therefore, a polymer solution is potentially useful only below its cloud point temperature. For application in a given reservoir, the temperature and frequently the hardness of the water is fixed." @default.
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- W149407529 date "1984-09-01" @default.
- W149407529 modified "2023-09-23" @default.
- W149407529 title "Stability of polyacrylamides in hard brines at elevated temperatures" @default.
- W149407529 hasPublicationYear "1984" @default.
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