skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems

Abstract

A water-soluble ionically-charged random copolymer of acrylamide and an alkaline or alkali metal 3-acrylamido-3-methylbutanoate having an average molecular weight of greater than about 50,000 has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl.sub.2 when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.

Inventors:
 [1];  [1]
  1. Hattiesburg, MS
Issue Date:
Research Org.:
University of Southern Mississippi
OSTI Identifier:
865824
Patent Number(s):
4584358
Assignee:
University of Southern Mississippi (Hattiesburg, MS)
DOE Contract Number:  
AS19-80BC10321
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
calcium-tolerant; n-substituted; acrylamides; thickeners; aqueous; systems; water-soluble; ionically-charged; random; copolymer; acrylamide; alkaline; alkali; metal; 3-acrylamido-3-methylbutanoate; average; molecular; weight; 50; 000; found; maintain; unusually; stable; effective; viscosities; presence; salts; nacl; cacl; added; water; minor; amounts; highly; mobility; control; agent; secondary; tertiary; oil; recovery; methods; scope; terpolymers; additionally; contain; olefinically; unsaturated; monomers; acrylic; acid; sodium; acrylate; recovery method; random copolymer; average molecular; aqueous systems; tertiary oil; minor amounts; oil recovery; alkali metal; molecular weight; minor amount; highly effective; mobility control; unsaturated monomers; additionally contain; acrylic acid; olefinically unsaturated; n-substituted acrylamides; control agent; n-substituted acrylamide; unsaturated monomer; calcium-tolerant n-substituted; /526/

Citation Formats

McCormick, Charles L, and Blackmon, Kenneth P. Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems. United States: N. p., 1986. Web.
McCormick, Charles L, & Blackmon, Kenneth P. Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems. United States.
McCormick, Charles L, and Blackmon, Kenneth P. Wed . "Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems". United States. https://www.osti.gov/servlets/purl/865824.
@article{osti_865824,
title = {Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems},
author = {McCormick, Charles L and Blackmon, Kenneth P},
abstractNote = {A water-soluble ionically-charged random copolymer of acrylamide and an alkaline or alkali metal 3-acrylamido-3-methylbutanoate having an average molecular weight of greater than about 50,000 has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl.sub.2 when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

Save / Share: