Angewandte Chemie International Edition

Cover image for Vol. 56 Issue 14

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemPhotoChem, ChemPlusChem, Zeitschrift für Chemie

Cover Picture (Angew. Chem. Int. Ed. Engl. 8/1985)

24_08/1985The cover shows an unfolded phase tetrahedron with the base A, B, C and the apex E. Such diagrams facilitate the understanding of the phase relationships in quaternary systems A-B-C-E at constant temperature. Quaternary systems containing water (A), oil (B), amphiphile (C), and electrolyte (E) are of importance for the tertiary recovery of petroleum as well as for the preparation of concentrated solutions of pharmaceuticals. The phase tetrahedron is valid for temperatures below the temperature of the three-phase body in the system A-B-C. cpα and cpε are critical points. Further details are reported by M. Kahlweit et al. on page 654ff.

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