The calculation of critical points

Chemical engineers have taken a new look at the critical-point mathematics for multicomponent hydrocarbon mixtures and have found an alternative way to evaluate the two nonlinear functions of the intensive variables in the critical phase; the procedure greatly facilitates the computations involved, allowing applications to very large systems (with up to 43 components) and to systems with high-density (liquid-liquid) critical points. The calculation procedure is robust and converges (in all the cases studied so far) in three to five iterations.