Bayer Aktiengesellschaft

Thomas Augustin

Thomas Scholl

Hermann Perrey

Dietmar Schapel

Christian Wegner

Ulrich Litzinger

Peter Nowak

Rolf Kehlenbach

Jorg Keldenich

Optimum amounts of demulsifiers for breaking oil-in-water emulsions with low salt contents and high surfactant contents are determined by measuring the streaming potential in the emulsion to be broken.

Process for breaking oil-in-water emulsions

The process according to the invention for the separation of oil-in-water emulsions by treatment of the emulsions with organic ionic demulsifiers and/or inorganic demulsifiers comprises carrying out the separation in two steps by first adding an organic cationic demulsifier to the o/w emulsions, and then adding an inorganic demulsifier, separating the oil phase from the resulting two-phase system and then treating the aqueous phase first with an inorganic demulsifier and then with an organic anionic demulsifier.

Process for the separation of oil-in-water emulsions

Surface-distributed hydrocarbons, in particular mineral oil and mineral oil processing products, are removed by allowing water and a polyether containing isocyanate end groups to act on the hydrocarbons and by mechanically removing the gel containing hydrocarbons which is formed.

Process for the removal of surface-distributed hydrocarbons, in

Specific new polyurea-modified polyetherurethanes and their uses as breakers for water-in-oil emulsions, in particular as breakers for water-in-oil emulsions.

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Cologne, Germany

Thomas Augustin