FIELD: petrochemical processes. SUBSTANCE: hexane-containing fraction is rectified and isolated fraction 65-75 C is subjected to hydrofining and subsequent rectification to yield fractions useful as solvents: in particular, bottom fraction enriched with n-hexane and top fraction enriched with iso-hexanes. The latter fraction or its part is subjected to additional hydrofining and then separated in rectifier into fraction containing more than 90 wt.% iso-hexanes and fraction containing at least 37 wt.% n-hexane. Hydrofining may be conducted in presence of alumino-platinum catalyst at 250-300 C. A part of hydrofined fraction can be recycled. EFFECT: increased solvent quality and reduced expenses. 3 cl, 4 ex
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