L.A.A.R. - Vol.28 - 1998

	CONTENTS
ARTICLES
PLENARY SESSIONS
D. B. Manley	THERMODYNAMICALLY EFFICIENT DISTILLATION: ETHYLENE RECOVERY	1
G. Maurer	THERMODYNAMICS OF AQUEOUS SYSTEMS OF REACTING GASES FOR PROCESS DESIGN IN THE PETROCHEMICAL AND RELATED INDUSTRIES	7
P. J.A.M. Kerkhof	NEW DEVELOPMENTS IN MEMBRANE TRANSPORT PHENOMENA	15
COMPUTING APPLICATIONS
G. S. Mannarino, G. P. Henning, H. P. Leone	MULTIVIEW ENTERPRISE MODELS FOR PROCESS INDUSTRIES	25
I. Ponzoni, M. C. Sánchez, N. B. Brignole	CDHG: A NEW PARTITIONING ALGORITHM BASED ON THE DETECTION OF CYCLES IN HYPERGRAPHS	31
INDUSTRIAL APPLICATIONS
R. F. P. M. Moreira, N. C. Kuhnen, M. G. Peruch	ADSORPTION OF REACTIVE DYES ONTO GRANULAR ACTIVATED CARBON	37
DYNAMICS AND CONTROL
A. Etchepareborda, R. Haran, J. Lolich	DISCRETE NONLINEAR PROCESS CONTROL USING NEURAL NETWORKS	43
D. W. Berns, J. L. Moiola	MULTIPLE OSCILLATIONS IN A CHEMICAL REACTOR	49
DESIGN AND SYNTHESIS
M. R. Galli, J. Cerdá	A USER-CONTROLLED FRAMEWORK FOR THE SYNTHESIS OF HEAT EXCHANGER NETWORKS INVOLVING NON-ISOTHERMAL MIXERS	57
TRANSPORT PHENOMENA
J. A. Deiber, M. B. Peirotti, A. Gappa	MODELING THE BATCH EVAPORATION OF NYLON SALT SOLUTION: THEORY AND EXPERIMENTS	63
R. A. Bortolozzi, J. A. Deiber	TWO- AND ONE-FIELD MODELS FOR NATURAL CONVECTION IN POROUS MEDIA	69
A. L. Souza, A. L. Andrade	MASS TRANSFER IN GASEOUS BUBBLES WITH LIQUID PHASE CHEMICAL REACTION	75
FOOD ENGINEERING AND BIOTECHNOLOGY
L. A. Campañone, V. O. Salvadori, R. H. Mascheroni	A FINITE-DIFFERENCE METHOD TO SOLVE COUPLED HEAT AND MASS BALANCES WITH SIMULTANEOUS SURFACE DEHYDRATION DURING FREEZING	83
G. Raya-Tonetti, N. I. Perotti	EXPANDED BED AFFINITY CHROMATOGRAPHY USING STREAMLINE-CIBACRON RED 3BA FOR SIMULTANEOUS PURIFICATION OF ALCOHOL DEHYDROGENASE AND GLUCOSE-6-PHOSPHATE DEHYDROGENASE FROM UNCLARIFIED YEAST HOMOGENATE	89
CHEMICAL REACTORS
E. O. Cobo, J. M. Bisang, J. B. Bessone	SIMULATION OF FIXED BED ELECTROCHEMICAL REACTORS UNDER LIMITING CURRENT CONDITIONS	95
M. H. Lacunza, P. E. Ugrin, A. Brandolin	HIGH PRESSURE POLYMERIZATION OF ETHYLENE IN TUBULAR REACTORS. PARAMETRIC STUDY TO OBTAIN MAXIMUM PRODUCTIVITY.	101
SIMULATION AND OPTIMIZATION
M. Tvrzská de Gouvêa, D. Odloak	ON-LINE MAXIMIZATION OF LPG IN THE FCC UNIT	107
A. B. Souzani, J. M. Pinto	PRODUCTION OPTIMIZATION OF BATCH PLANTS WITH PREDEFINED ALLOCATION	115
S. Diaz, A. Serrani, A. Bandoni, E. A. Brignole	A SIMULATOR/OPTIMIZER FOR NATURAL GAS PLANTS	123
C. G. Raspanti, J. A. Bandoni, L. Biegler	NEW FASTER SOLUTION FOR THE STEADY-STATE BACK-OFF PROBLEM	129
THERMODYNAMICS
M. Aznar, L. Stragevitch, S. G. d’Ávila	LIQUID-LIQUID EQUILIBRIA: A COMPARISON BETWEEN ORIGINAL AND MODIFIED UNIFAC	135