Berol Kemi Ab

Tendex Kjemi Service A/s

Eva M Andreasson

Krister A Holmberg

Borje Nystrom

Finn Egeli

Eva M Osterberg

Eva M Sterberg

Kjell G Stridh

A surface active compound for use in microemulsions useful in oil recovery, wood impregnating, dry cleaning, cleaning of hard surfaces and for floor polishing, which has one hydrophobic group, containing 9-50, preferably 12-35 carbon atoms and 2-6 separate hydrophilic end groups, at least one of the hydrophilic end groups being a nonionic group obtained by reacting a compound having a reactive hydrogen atom with an alkylene oxide having 2-4 carbon atoms and at least one being an anionic group.

Surface active compound, a microemulsion containing said compound and

Formations surrounding oil wells, gas wells, injection wells and similar bore holes are treated by the injection of a microemulsion containing an acid solution. The main surfactant of the microemulsion is characterized by having at least two hydrocarbon groups attached to a nitrogen atom via a polar groups.

Acidizing method using microemulsion

Growing community of inventors

Gothenburg, Sweden

Eva M Andreasson