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ABSTRACT
Dilute aqueous “solutions” of anionic surfactants injected during enhanced oil recovery processes usually contain liquid crystalline material. Phase behavior has been studied in a model system containing sodium chloride brine with surfactant, alcohol, and salt contents maintained below 6, 10, and 3 weight percent respectively. Pseudoternary phase diagrams at constant salinities are used to represent the results. Some interpretation of the results is given in terms of micellar shape transformations produced by changes in the relative hydrophilic and hydrophobic properties of surfactant-alcohol mixtures.
Notes
Present Address: Rohm and Haas Research Laboratory 727 Norristown Road Spring House, Pennsylvania 19477
Present Address: Department of Chemical Engineering Rice University Houston, Texas 77251
Present Address: Vice President for Academic Affairs California Polytechnic State Univ. San Luis Obispo, California 93407