Mass action model for solute distribution between water and micelles. Partial molar volumes of butanol and pentanol in dodecyl surfactant solutions

Journal Article · Wed Jan 01 04:00:00 EST 1986 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00646309· OSTI ID:7200083

De Lisi, R; Castagnolo, M; Inglese, A; Liveri, V T

Water-surfactant-solubilizate systems have attracted much attention in recent years since these systems in the presence of oil can lead to microemulsions that have important applications in oil recovery. In this light, the densities of 1-butanol and 1-pentanol were measured in aqueous solutions of dodecyltrimethylammonium bromide and dodecyldimethylamine oxide, and the partial molar volumes at infinite dilution of the alcohols in aqueous surfactant solutions were obtained. The observed trends of this quantity as a function of the surfactant concentration were rationalized using a mass-action model for the alcohol distribution between the aqueous and the micellar phase. At the same time, the model was revised to account for the alcohol effect on the surfactant micellization equilibrium. The partial molar volume of alcohols in the aqueous and in the micellar phases and the ratios between the binding constant and the aggregation number were calculated. These thermodynamic quantities are nearly the same in the two surfactants analyzed but differ appreciably from those in sodium dodecylsulfate. The apparent molar volume of surfactants in some hydroalcoholic solutions at fixed alcohol concentration were also calculated. In the micellization region the trend of this quantity as a function of the surfactant concentration shows a hump, which depends on the alcohol concentration and on the alcohol alkyl chain length. The alcohol extraction from the aqueous to the micellar phase due to the addition of the surfactant can account for the observed trends.

• Research Organization: Istitutio di Chimica Fiscia, Palermo
• OSTI ID: 7200083
• Journal Information: J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 15:1; ISSN JSLCA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
BUTANOLS
COLLOIDS
COMPILED DATA
DATA
DENSITY
DISPERSIONS
DISPLACEMENT FLUIDS
EMULSIONS
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
HYDROXY COMPOUNDS
INFORMATION
MATHEMATICAL MODELS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
NUMERICAL DATA
OIL WELLS
ORGANIC COMPOUNDS
PARTIAL MOLAL VOLUME
PENTANOLS
PHYSICAL PROPERTIES
QUANTITY RATIO
RECOVERY
SURFACTANTS
WELLS