Enthalpies of solutions and dilution of butanol and pentanol in dodecyltrimethylammonium bromide micellar solutions

Journal Article · Fri May 01 04:00:00 EDT 1987 · J. Solution Chem.; (United States)

DOI:https://doi.org/10.1007/BF00647185· OSTI ID:6106367

De Lisi, R; Milioto, S; Castagnolo, M; Inglese, A

The enthalpies of solution and of dilution of 1-butanol and 1-pentanol were measured in micellar solutions of dodecyltrimethylammonium bromide by systematically changing the concentration of alcohols and surfactant. The enthalpies of solution at infinite dilution of alcohols at each surfactant concentration were evaluated from a linear plot. This quantity increases with surfactant concentration (up to 0.8m) with a curvature which depends on the alcohol alkyl chain length. The difficulties arising for a quantitative treatment of both the enthalpies of dilution and of solution at finite alcohol concentrations are discussed. The dependence on the surfactant concentration of the standard enthalpies of solution and the enthalpies of dilution for m ..-->.. 0 are rationalized. From the resulting equations the distribution constant, standard enthalpy of transfer, standard enthalpy of solution, and the alcohol-alcohol interaction parameter in the micellar phase are evaluated. The enthalpies of transfer obtained using this technique agree well with those previously reported from enthalpies of mixing. The distribution constants also agree with those reported in the literature from several approaches: mixing enthalpies, partial molar volumes, and the dependence of the cmc on added alcohol.

• Research Organization: Universita di Palermo, Italy
• OSTI ID: 6106367
• Journal Information: J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 16:5; ISSN JSLCA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALCOHOLS
AMINES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
BINDING ENERGY
BUTANOLS
DILUTION
DISPLACEMENT FLUIDS
ENERGY
ENHANCED RECOVERY
ENTHALPY
FLUID INJECTION
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
MIXING HEAT
OIL WELLS
ORGANIC COMPOUNDS
PARTIAL MOLAL VOLUME
PENTANOLS
PHYSICAL PROPERTIES
QUANTITY RATIO
QUATERNARY COMPOUNDS
RECOVERY
SOLUTION HEAT
SOLVENT PROPERTIES
SURFACTANTS
THERMODYNAMIC ACTIVITY
THERMODYNAMIC PROPERTIES
WELLS