Contact UNIFAC Consortium

The UNIFAC Consortium is maintained by DDBST GmbH (full name of our company is "DDBST Dortmund Data Bank Software & Separation Technology GmbH") since 2011 when Prof. Gmehling retired and the consortium management was moved from the University of Oldenburg to DDBST.

Postal address

ATTN: Dr. Dana Constantinescu
Marie-Curie-Str. 10
D-26129 Oldenburg



Consortium Managers


Dr. Dana Constantinescu manages the UNIFAC Consortium since 2009 when she overtook this work from Dr. Antje Jakob.

Dana can be contacted directly by

  • E-Mail:
  • Telefone: +49 441 361819 191
  • Telefax: +49 441 361819 10

Please take also a look at her personal page listing several of her scientific publications and other presentations.


Dr. Dana Constantinescu

Prof. Dr. Jürgen Gmehling is the founder of the Consortium. He can be contacted by

  • E-Mail:

Please take also a look at the university page of Prof. Gmehling, including a curriculum vitae and an overview about his research activities. Please note that the contact information on the university pages are not valid anymore.

Prof. Dr. Jürgen Gmehling

Required Information by German Law

Company Register: Amtsgericht Oldenburg, HRB 2521
EG Reg. No.: DE117483996
Company Reg. No.: 26415609
Tax No.: 2364 06420506429
Board of Directors: Prof. Dr. Jürgen Gmehling,
Dr. Andreas Grybat, Dr. Sven Horstmann, Dr. Christian Ihmels, Dr. Bastian Schmid