FIELD: petroleum processing.
SUBSTANCE: heavy petroleum fraction with hydrogen content 12% or less is subjected to solvent extraction under such conditions that hydrogen content relative to the weight of fraction is raised by 0.2-1.5%. Thus obtained dewaxed petroleum fraction is the subjected to hydrofining under such conditions that hydrogen content relative to the weight of dewaxed petroleum fraction rises by 0.5-1.5% and purified petroleum fraction is thereby produced.
EFFECT: increased degree of purification.
7 cl, 7 tbl, 10 ex
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