hydrolysis and precipitation of polyacrylamides in hard

hydrolysis and precipitation of polyacrylamides in hard

Hydrolysis and Precipitation of Polyacrylamides in Hard

Theresultant more hydrolyzed poly-acrylamide may have a degree of hydrolysissufficient to poly-acrylamide may have a degree of hydrolysis sufficient tocause precipitation in the reservoir or injection water used. Several investigations have dealt with this precipitation mechanism ofpolyelectrolytes in hard brines.

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hydrolysis and precipitation of polyacrylamides in hard

Hydrolysis and precipitation of polyacrylamides in hard

@article{osti_6591688, title = {Hydrolysis and precipitation of polyacrylamides in hard brines at elevated temperatures}, author = {Moradi-Araghi, A and Doe, P H}, abstractNote = {Laboratory data are used to show that commercial polyacrylamides hydrolyze to an equilibrium degree that depends on the temperature of hydrolysis but is largely independent of the brine composition.

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hydrolysis and precipitation of polyacrylamides

hydrolysis and precipitation of polyacrylamides

Hydrolysis and Precipitation of Polyacrylamides in Hard It has not been clear how farthe temperature/hardness limits can be pushed without polymer precipitation.precipitation. We attempt to define some of these limits through an extensiveseries of cloud-point measurements for commercial polyacrylamides, coupled withdata on the rate of

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stability of polyacrylamides in hard brines at elevated

Stability of polyacrylamides in hard brines at elevated

@article{osti_6394949, title = {Stability of polyacrylamides in hard brines at elevated temperatures}, author = {Moradi-Araghi, A and Doe, P H}, abstractNote = {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.

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hydrolysis of cationic polyacrylamide and its effect on

Hydrolysis of cationic polyacrylamide and its effect on

Hydrolysis of Cationic Polyacrylamide and its Effect on Flocculation of Ground Calcium Carbonate. Dongil Seo, Kyudeok Oh, Wanhee Im, and Hak Lae Lee * Cationic polyacrylamides (C-PAMs) have been widely used as flocculating agents to aggregate particles carrying negatively charged surfaces.

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polymers | free full-text | assessment of polyacrylamide

Polymers | Free Full-Text | Assessment of Polyacrylamide

The hydrolysis in HPAM, however, significantly increases at temperatures above 70 掳C. As the degree of hydrolysis reaches the critical value of 40%, polymer precipitation (due to bridging effect) occurs in the presence of high concentrations of divalent cations [5,7,8,9,10,11]. The degree of hydrolysis is defined here as the fraction of the

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automated and manual methods for the determination of

Automated and Manual Methods for the Determination of

Hydrolysis and Precipitation of Polyacrylamides in Hard Brines at Elevated Temperatures SPE Res Eng (May,1987) Rheology and Stability of IOR Produced Liquid in Daqing Oilfield

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