Residue curve maps of 4-component systems. Poincare index determination for 4-component azeotrope

Abstract

A method of Poincare index determination for a singular point corresponding to a 4-component azeotrope is proposed. The method is based on the equation of azeotropic relationship. 2-Dimensional diagram covering the 3-dimensional residue curve map as a surface is meant to be given originally.

Keywords

• phase portrait of residue curve map
• singular point of a vector field formed by liquid-vapor equilibrium nodes
• saddle point
• node point
• azeotrope
• azeotropic relationship
• poincaré index sign