TC Lines

We supply vapour liquid equilibrium data for 5000 binaries determined using TC lines

When you need accurate

vapour-liquid equilibrium data,

you can count on TC Lines NZ Ltd.

TC Lines NZ Ltd. can offer VLE data with such accuracy that has never been available globally until now. It avoids the need for substantial experimentation wherever you or your clients are involved in the separation of mixtures using distillation and extraction towers.

TC line and PPM

TC Lines NZ Ltd. supplies accurate vapour-liquid equilibrium (VLE) data and liquid-liquid equilibrium (LLE) data. We predict such results using thermodynamic consistency (TC) lines. Using the TC lines of 5000 binary systems, we established a pure prediction method (PPM) for binary VLE and LLE.



Our products

(1)   Binary parmeters of Margules, van Laar, NRTL and UNIQUAC equtaions can be supplied. The parameters are predicted using the PPM. Partial molar excess enthalpy data are included (examples: ex. 1, ex. 2)

(2)   Mixture data recommendation CD series covers existing experimental VLE and LLE data (examples: ex. 1, ex. 2)

(3)   Multicomponent and two-liquid phase forming VLE or LLE calculation program (perl and Excel-VBA)

(4)    Simple distillation calculation program or total reflux distillation calculation program (perl and Excel-VBA) covering multicomponent and two-liquid phase forming mixtures can be supplied.


(1) See definition of the TC line,

(2) Be aware the limits of conventional consistency tests.


Prices, publications and patents

Contact us

Dr. Satoru Kato, Professor Emeritus (Tokyo Metropolitan Univ.)

C.E.O of TC Lines NZ Ltd.
Phone: +64 275 188 323 (New Zealand)

Location: Avonhead, Christchurch, New Zealand