caa a22 4500 465795730 CHVBK 20180323112037.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02539699 doi (NATIONALLICENCE)springer-10.1007/BF02539699 Ultralow oil-water IFTs using neutralized oxidized hydrocarbons as surfactants [Elektronische Daten] [Hongdu Huang, W. Donnellan III, J. Jones] Surfactants that may be suitable for application in enhanced oil recovery have been produced from C22 and C26 paraffinic and naphthenic petroleum fractions by a two-step process. The hydrocarbon feed stocks were first oxidized in the vapor-phase, followed by neutralization of the oxidized products with aqueous alkali. As a result, dilute solutions of organic acid salts were produced that achieved ultralow (<10−2 dyne/cm) interfacial tensions against a synthetic oil. Surfactant solutions that exhibited the lowest interfacial tensions (IFTs) were prepared from neutralizations that used low concentrations of sodium hydroxide rather than sodium silicate, sodium tripolyphosphate, or sodium carbonate. Neutralizations that used sodium silicate or sodium carbonate resulted in surfactant solutions having IFT profiles that were less sensitive to the electrolyte concentration. When sodium hydroxide was combined with either sodium silicate or sodium tripolyphosphate in the neutralizations, solutions having intermediate IFT properties were produced. The amount of alkali used in the neutralizations was observed to affect the IFT properties of the resultant surfactant solution. The electrolyte concentration at which the minimum IFT occurred was inversely related to the pH of the surfactant solution. For surfactant solutions of common pH prepared from different concentrations of oxidized product, the minimum IFTs all occurred at the same concentration of electrolyte. Surfactant solutions remained interfacially active even in the presence of significant concentrations of calcium chloride. One pore volume of a solution containing only about 1% of active surfactant recovered 42.0% of the residual oil in a tertiary core-flood experiment. AOCS Press, 1990 Huang Hongdu Jianghan Petroleum Institute, Jiangling Hubei, China aut Donnellan III W. Pennsylvania State University, 168O2, University Park, PA aut Jones J. Pennsylvania State University, 168O2, University Park, PA aut Journal of the American Oil Chemists' Society Springer-Verlag 67/6(1990-06-01), 406-414 0003-021X 67:6<406 1990 67 11746 https://doi.org/10.1007/BF02539699 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02539699 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang Hongdu Jianghan Petroleum Institute, Jiangling Hubei, China aut NATIONALLICENCE 700 1- Donnellan III W. Pennsylvania State University, 168O2, University Park, PA aut NATIONALLICENCE 700 1- Jones J. Pennsylvania State University, 168O2, University Park, PA aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/6(1990-06-01), 406-414 0003-021X 67:6<406 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer