Method of extracting naphthenic acids from oil-field waters

The extraction of naphthenic acids from industrial reservoir waters by extraction with kerosene in the presence of iron (III) was studied. The raw material source is Naftalan oil. To obtain desalted Naftalan oil, her is purified by the acid-contact method. It was shown that in order to further purify hydrocarbons from small amounts of resins, and partially from naphthenic acids and to isolate the so-called white Naphthalan oil, the resulting product (desalted Naphthalan oil) is passed through a column filled with adsorbent - activated clay. It was established that optimum condition for quantitative removal of naphthenic acid from water in general alkalinity ~ equals to Fe3+:NA = 3, Vw:Vo=0.008.