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@@ Starting from the patent assigned to I．G．Fa rbeinindustrie[1]the production of non-ionic su rfactant obtained by ethoxylation of fatty organic substances，containing at least one reactive hyd rogen，has increased enormously．For example，nowadays more than 50％of world consumption of su rfactants for household detergents is represented by alcohol ethoxylates and alcohol ethers sulphates[2]．