FIELD: chemistry.
SUBSTANCE: invention relates to processing liquid hydrocarbons for converting acidic impurities into less odorous compounds. The invention relates to a method of processing a purified finished oil product containing mercaptans, which includes (a) mixing the purified finished oil product containing mercaptans with an oxygen-containing gas to form a mixture and feeding said mixture onto a vertical screen consisting of vertically suspended nonporous fibres; (b) feeding an aqueous liquid treatment solution onto said screen, where the liquid treatment solution is combined with the mixture from step (a), which flows downwards on the vertically suspended fibres, wherein the liquid treatment solution is obtained by mixing: (i) an alkali metal hydroxide; (ii) a cobalt phthalocyanine catalyst; (iii) either naphthenic or ethylhexanoic acid; (iv) one component selected from cresol, cyclohexanol, propylene glycol, isopropanol or cresylic acid; and (v) water. Catalytic oxidation of mercaptans to disulphide oils and separation of the purified finished oil product and disulphide oil in the form of a refined hydrocarbon product from the liquid treatment solution and oxygen-containing gas are performed. The invention also relates to a two-step method of processing the purified finished oil product.
EFFECT: efficient purification of hydrocarbons.
19 cl, 1 dwg, 4 tbl, 12 ex
