Scientists and chemical engineers in industry, research and teaching still measure phase equilibria despite the significant improvement in theoretical evaluations.

For that reason, the FISCHER^® - phase equilibrium apparatus is part of the standard equipment in chemical engineering laboratories.

The vapour-liquid equilibrium of binary and multi-component mixtures constitute an essential basis for the determination of the theoretical plates necessary for the evaluation of separation processes. Although VLE-data are known from literature, there is still an increasing tendency towards re-deter-mining equilibrium data by experiments, because the thermodynamic para-meters like pressure, temperature and concentrations are different or inadequate.

For designing e.g. extractive-distillation processes the evaluation of vapour-liquid-liquid phase equilibria (VLLE-data) are required. The practical measurement and determination of these data proves difficult with the standardized VLE-units because of the phase formation of the liquids.

i-Fischer Engineering GmbH collaborates closely under an exclusive license with the University of Alicante (Spain) and adapted their patented scientific idea (ES 2 187 220 B2) to create a device design suitable for serial production.

Hence, besides the common apparatus for determining VLE-data there now a specifically designed apparatus for determining VLLE-data available in the market, too.