Abstract: An apparatus for the extraction of liquid hydrocarbons (MHC) has a mechanism for providing a process water composition (PWC) comprising a liquid emulsifier and water, an intake device (10) for collecting a liquid feedstock mixture comprising the hydrocarbons (MHC), a separating system connectable to the intake device, the separating system providing for a processing of the liquid feedstock mixture together with the process water composition so as to extract at least some of the hydrocarbons (MHC) from the liquid feedstock mixture, wherein the liquid emulsifier comprises a natural plant oil, an emulsifier, and preferably also a solubilizer.

Abstract: An emulsifier concentrate for producing a working solution comprising 30-50 Vol % of a natural plant oil, selected from colza oil, corn oil, sunflower oil, 10-25 Vol % of octanol as a solubilizer, and 27-55 Vol % of an emulsifier, consisting of 26.5-45 Vol % of a non-ionic tenside, and 0.5-10 Vol % of an anionic tenside.