PHASE-EQUILIBRIA IN POLYMER-SOLUTIONS - BLOCK-ALGEBRA, SIMULTANEOUS FLASH ALGORITHM COUPLED WITH SAFT EQUATION OF STATE, APPLIED TO SINGLE-STAGE SUPERCRITICAL ANTISOLVENT FRACTIONATION OF POLYETHYLENE

被引：31

作者：

CHEN, CK

DURAN, MA

RADOSZ, M

机构：

[1] Exxon Research and Engineering Company, New Jersey 08801, Annandale

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1993年 / 32卷 / 12期

关键词：

D O I：

10.1021/ie00024a023

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A robust but rigorous flash algorithm allows for simulating multicomponent two-phase equilibria in supercritical asymmetric solutions that contain very large and very small components, such as polymers and supercritical solvents or monomers. The approach is to solve simultaneously all the equilibrium and material balance equations using a Newton iterative procedure in the framework of block algebra. The SAFT equation of state is used to estimate the required thermodynamic properties. This approach is illustrated with an example of single-stage fractionation of polyethylene with supercritical ethylene and 1-hexene. The calculated solvent capacities and selectivities are related to ethylene concentration, pressure, and temperature.

引用

页码：3123 / 3127

页数：5

共 11 条

[1] DENSITY-TUNED POLYOLEFIN PHASE-EQUILIBRIA .1. BINARY-SOLUTIONS OF ALTERNATING POLY(ETHYLENE PROPYLENE) IN SUBCRITICAL AND SUPERCRITICAL PROPYLENE, 1-BUTENE, AND 1-HEXENE - EXPERIMENT AND FLORY-PATTERSON MODEL [J].

CHEN, SJ ;

RADOSZ, M .

MACROMOLECULES, 1992, 25 (12) :3089-3096

[2] APPLICATIONS OF AUGMENTED VANDERWAALS THEORY OF FLUIDS .1. PURE FLUIDS [J].

CHEN, SS ;

KREGLEWSKI, A .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1977, 81 (10) :1048-1052

[3]

Henley E.J., 1981, EQUILIBRIUM STAGE SE

[4] EQUATION OF STATE FOR SMALL, LARGE, POLYDISPERSE, AND ASSOCIATING MOLECULES - EXTENSION TO FLUID MIXTURES [J].

HUANG, SH ;

RADOSZ, M .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1991, 30 (08) :1994-2005

[5] EQUATION OF STATE FOR SMALL, LARGE, POLYDISPERSE, AND ASSOCIATING MOLECULES [J].

HUANG, SH ;

RADOSZ, M .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1990, 29 (11) :2284-2294

[6] INFLUENCE OF POLYMER MOLECULAR-WEIGHT ON PHASE BEHAVIOR OF GAS-POLYMER-SYSTEMS UNDER HIGH-PRESSURE [J].

LUFT, G ;

LINDNER, A .

ANGEWANDTE MAKROMOLEKULARE CHEMIE, 1976, 56 (DEC) :99-114

[7] CALCULATION OF PHASE ENVELOPES AND CRITICAL-POINTS FOR MULTICOMPONENT MIXTURES [J].

MICHELSEN, ML .

FLUID PHASE EQUILIBRIA, 1980, 4 (1-2) :1-10

[8]

MONROY R, 1987, MATH STRUCTURE EXPLO

[9]

MONROY R, 1987, AVANCES INGENIERIA I, P74

[10]

RADOSZ M, 1992, Patent No. 89574210

← 1 2 →