The Rackett method (RACKETT) may be used to predict liquid densities. The liquid density is computed from equations relating the critical temperature, critical pressure and Rackett parameter for the mixture. PRO/II contains Rackett parameters for many components. If the Rackett parameter is not available, the critical compressibility of the component will be used instead.
Refer "Rackett" under "Generalized Correlation Methods" in Chapter 2, Volume 1 of the PRO/II Reference Manual for more information.
Application Guidelines
The method is applicable to most systems of light hydrocarbons.