The UNIFAC Consortium
The UNIFAC Consortium is revising and extending the group contribution methods Modified UNIFAC (Dortmund), Original UNIFAC, and Predictive Soave-Redlich-Kwong (PSRK).
The UNIFAC Consortium is a department of DDBST GmbH and not an independent organization; its staff is DDBST's staff and all contracts of the consortium sponsors are concluded with DDBST.
The consortium maintains its own web pages.
The work was focussed mainly on the further development of the modified UNIFAC (Dortmund) method and the consortium managed to double the number of available parameters and to improve the quality and reliability of the method to a really remarkable extent.
The current (consortium delivery 2016) interaction parameter matrix for modified UNIFAC (Dortmund) contains 6506 (6308 for 2015) parameters for 1730 (1675 for 2015) group pairs.
For comparison: The published parameter matrix for modified UNIFAC (Dortmund) contained 2670 parameters for 659 group pairs:
Jakob A., Grensemann H., Lohmann J., Gmehling J., "Further Development of Modified UNIFAC (Dortmund): Revision and Extension 5", Ind.Eng.Chem.Res., 45(23), 7924-7933, 2006
All the UNIFAC Consortium's work in a single diagram gives the following triangle:
The following animated diagram shows the yearly growth of interaction parameters from 1997 to 2016:
The next diagram contains the same information but the information about the revised and added parameter is color-encoded:
All the changes (new and revised parameter) for original UNIFAC are shown in the following diagram:
All the changes (new and revised parameter) for PSRK are shown in the following diagram: