Library Subscription: Guest
ICHMT DL Home Current Year Archives Executive Committee International Centre for Heat and Mass Transfer

COACERVATION CHARACTERISTICS OF NONIONIC SURFACTANTS AND THEIR APPLICATION TO METAL SEPARATION

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhen.340
10 pages

Shigendo Akita
Nagoya Municipal Industrial Research Institute, Rokuban, Atsuta-ku, Nagoya 456, Japan

Miquel Rovira
Chemical Engineering Department, Universitat Politecnica de Catalunya, Diagonal 647, E-08028, Barcelona, Spain

Ana M. Sastre
Chemical Engineering Department, Universitat Politecnica de Catalunya, Diagonal 647, E-08028, Barcelona, Spain

Nobuhisa Hyodo
Department of Chemical Engineering, Nagoya University, Chikusa-ku, Nagoya 464-01, Japan

Hiroshi Takeuchi
Department of Chemical Engineering, Nagoya University, Chikusa-ku, Nagoya 464-01, Japan

Abstract

Phase-separation characteristics of aqueous solutions containing a nonionic surfactant, polyoxyethylene nonyl phenyl ether, have been studied from viewpoints of equilibrium and history. The surfactant aggregates to make a small coacervate phase from the solution at a temperature above its cloud point, which increased with increasing HCl concentration. A phase diagram relating the composition of the surfactant-rich phase to the aqueous phase was constructed with a variety of the concentrations of HCl and NaCl, as a function of the temperature difference between the settling medium and the cloud point. The effects of operating parameters on the phase-separation history were also examined, and it was found that more hydrophobic surfactant allows the phase-separation to slow. Moreover, the application of the surfactant system to metal separation was demonstrated for the recovery of gold(III) and gallium(III) from HCl medium.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH