p. 305 - 310 EXPERIMENTATIONS SUR L'ELARGISSEMENT DE L'ECHELLE D'APPLICATION DES COMPOSES TENSIOACTIFS A LA DEPOLLUTION DES HYDROCARBURES Victoria Piescu Institut Roumain de Recherches Marines Constanta Abstract Emulsionate depolluteants of hydrocarbons are indicated in fine oil layers found on the seawater surface or for cleaning of beaches and shores affected by the pollution with hydrocarbons. The works made for selection and conditioning of tensioactive components emulgators of mechanical type tensioactive components in organic solvents water solutions made in the laboratoires of Romanian Marine Rsearch Institute led to the obtaining of 11 variants for hydrocarbon emulsionate products. The obtained depolluteants are designated for dispersion of layers having a thickness till 2000 , maximum efficincy being 98% or for cleaning the sands and rocks impurified with hydrocarbons with a maximum efficiency for cleaning of 87%.