impact of salts on polyacrylamide hydrolysis and gelation

impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation

The effects of salts [sodium chloride (NaCl) and ammonium chloride (NH 4 Cl)] on the degree of hydrolysis (DH) of PAM were investigated. These salts were used as retarders to elongate the gelation time of the PAM/PEI system. The data obtained from 13 C-NMR was used to understand the

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impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation: New insights Khalid S. M. El Karsani Chemical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261 P. O. Box 5050, Saudi Arabia

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impact of salts on polyacrylamide hydrolysis and gelation

Impact of Salts on Polyacrylamide Hydrolysis and Gelation

Request PDF | Impact of Salts on Polyacrylamide Hydrolysis and Gelation: New Insights | Polyacrylamide (PAM) and its derivatives are the most commonly used polymers in the preparation of polymeric

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impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation: New insights

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impact of salts on polyacrylamide hydrolysis and gelation

Impact of salts on polyacrylamide hydrolysis and gelation

Polyacrylamide (PAM) and its derivatives are the most commonly used polymers in the preparation of polymeric gels for water control in petroleum reservoirs. This study involved the use of polyethylenimine (PEI) as a crosslinker for PAM. In this study, we investigated PAM alkaline hydrolysis at high temperatures. The effects of salts [sodium chloride (NaCl) and ammonium chloride (NH4Cl)] on the

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(pdf) effect of salts on polyacrylamide hydrolysis and cross

(PDF) Effect of Salts On Polyacrylamide Hydrolysis and Cross

Impact of Salts on Polyacrylamide Hydrolysis and Gelation: New. It was found that high temperatures lead to high release of heat due to gelation. The effect of salts on the cross-linking was

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evaluation of polyacrylamide gels with accelerator ammonium

Evaluation of polyacrylamide gels with accelerator ammonium

4.2. Effect of monovalent and divalent cations on gelation time. Salt content and type have a significant effect on gelation time. Before field application, it is necessary to investigate the effects of both monovalent and divalent cations on the gelation time.

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gelation kinetics of pam/pei system | springerlink

Gelation kinetics of PAM/PEI system | SpringerLink

Moreover, the influence of different parameters such as gelation temperature, water salinity, and impact of some salts on the gelation time was studied. Further, two different approaches were used to model the gelation kinetics, and kinetic parameters were extracted and related to gel composition and gelation conditions.

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evaluation of polyacrylamide gels with accelerator ammonium

Evaluation of polyacrylamide gels with accelerator ammonium

4.2. Effect of monovalent and divalent cations on gelation time. Salt content and type have a significant effect on gelation time. Before field application, it is necessary to investigate the effects of both monovalent and divalent cations on the gelation time.

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polyacrylamide degradation and its implications in

Polyacrylamide degradation and its implications in

Zhang, H., Zhong, Z. & Xing, W. Application of ceramic membranes in the treatment of oilfield-produced water: effects of polyacrylamide and inorganic salts. Desalination 309 , 84–90 (2013).

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the effect of temperature on gelation time for polyacrylamide

The Effect of Temperature on Gelation Time for Polyacrylamide

Gelation times were measured for five different polymers, including polymers with various degrees of hydrolysis and polymers with nonionic, anionic, and cationic character. The temperature range was 25 to 80 deg. C. Polymer, metal ion, and redox system concentrations and salinity also were varied.

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(pdf) experimental investigations on the gelation behavior of

(PDF) Experimental Investigations on the Gelation Behavior of

Experimental Investigations on the Gelation Behavior of Partially 5 Hydrolyzed Polyacrylamide – Hexamine – Pyrocatechol Gels Figure 4: Effect of Cross-Linker Concentration on the Gelation Time at Different Temperature and pH 8.5 (1.0 Wt% PHPA) CONCLUSIONS The several conclusions may be drawnfrom the present experimental study: The gelation

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gelation kinetics of pam/pei system | springerlink

Gelation kinetics of PAM/PEI system | SpringerLink

Moreover, the influence of different parameters such as gelation temperature, water salinity, and impact of some salts on the gelation time was studied. Further, two different approaches were used to model the gelation kinetics, and kinetic parameters were extracted and related to gel composition and gelation conditions.

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sequence distribution of carboxyl groups in hydrolyzed

Sequence distribution of carboxyl groups in hydrolyzed

Impact of salts on polyacrylamide hydrolysis and gelation: New insights. Rheological studies of the gelation kinetics of Cr +3 -polyacrylamide solutions.

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effect of salt and temperature on molecular aggregation

Effect of salt and temperature on molecular aggregation

The aggregation behaviours of these polymers in salts water solution were studied. The molecular chains of homopolymer were stretched in salt water solutions, since it did not undergo hydrolysis and there were no charges in the backbone and side chains. Therefore, the conformation of homopolymer was hard to be attacked by salt ions.

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effects of pretreatment on properties of gelatin from perch

EFFECTS OF PRETREATMENT ON PROPERTIES OF GELATIN FROM PERCH

fish gelatin including its nanostructure.[14] All the above-mentioned processes suggest that fish gelatin is affected by various pretreatment methods. In this present study, the effects of pretreatment process involving acetic acid, NaOH, and NaCl, on the gelatin produced from

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evaluation of polyacrylamide gels with accelerator ammonium

Evaluation of polyacrylamide gels with accelerator ammonium

4.2. Effect of monovalent and divalent cations on gelation time. Salt content and type have a significant effect on gelation time. Before field application, it is necessary to investigate the effects of both monovalent and divalent cations on the gelation time.

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effects of salts on activity of halophilic cellulase with

Effects of salts on activity of halophilic cellulase with

Alkaliphilic and halophilic Bacillus sp. BG-CS10 was isolated from Zabuye Salt Lake, Tibet. The gene celB, encoding a halophilic cellulase was identified from the genomic library of BG-CS10. CelB belongs to the cellulase superfamily and DUF291 superfamily, with an unknown function domain and less th …

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(pdf) experimental investigations on the gelation behavior of

(PDF) Experimental Investigations on the Gelation Behavior of

Experimental Investigations on the Gelation Behavior of Partially 5 Hydrolyzed Polyacrylamide – Hexamine – Pyrocatechol Gels Figure 4: Effect of Cross-Linker Concentration on the Gelation Time at Different Temperature and pH 8.5 (1.0 Wt% PHPA) CONCLUSIONS The several conclusions may be drawnfrom the present experimental study: The gelation

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sequence distribution of carboxyl groups in hydrolyzed

Sequence distribution of carboxyl groups in hydrolyzed

Impact of salts on polyacrylamide hydrolysis and gelation: New insights. Rheological studies of the gelation kinetics of Cr +3 -polyacrylamide solutions.

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slow gelation of titanium(iv) with partially hydrolyzed

Slow Gelation of Titanium(IV) with Partially Hydrolyzed

The gelation of metallic crosslinking agent titanium(IV) (Ti(IV)) with partially hydrolyzed polyacrylamide (HPAM) is studied. Factors effecting the crosslinking reaction are discussed and the

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us4744418a - delayed polyacrylamide gelation process for oil

US4744418A - Delayed polyacrylamide gelation process for oil

A process for delaying the gelation rate of a polymer used in oil recovery applications. A gel is prepared by mixing a single aqueous gelation solution at the surface made up of a polyvalent metal cross-linking agent and a polyacrylamide having no hydrolysis or only a limited degree of hydrolysis.

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gelation of a water-shutoff gel at high pressure and high

Gelation of a Water-Shutoff Gel at High Pressure and High

This study investigates the strength of an organically crosslinked polyacrylamide (PAM) with polyethylenimine (PEI) as crosslinker. Dynamic testing measurements at high temperatures up to 130°C (266°F) and high pressure (500 psi) were used. During the gelation process, the rate of crosslinking increases with increased temperature.

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us5069281a - process for enhanced delayed in situ gelation of

US5069281A - Process for enhanced delayed in situ gelation of

A gelation solution is then prepared comprising polyacrylamide a polyvalent metal carboxylate crosslinking agent, a gelation delaying agent and a buffer with a pKa of about 3.5 to about 6.8. Gelation delays are achieved by selecting the polyacrylamide concentration, delaying agent concentration and type, and buffer concentration and type, for

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