pH effects on the solubility of polyacrylamides in hard brines

✍ Scribed by Paola Albonico; Thomas P. Lockhart

• Book ID: 102738649
• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 540 KB
• Volume: 55
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1995.070550107

✦ Synopsis

Solubility tests have been conducted on hydrolyzed polyacrylamide (PAAm) polymers to define the pH range for solubility as a function of the salinity of the solutions. These tests show for the first time that pH is a critical variable determining the solubility of extensively hydrolyzed PAAm in brines containing divalent cations. The pH range for solubility of PAAm and an acrylamide copolymer as a function of aging in synthetic seawater at elevated temperature is also reported. The underlying mechanisms for the pH-dependent solubility behavior observed and the implications for petroleum applications of acrylamide polymers are discussed.