C10G 49/007

Treatment of hydrocarbon oils in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of the groups [CPC: C10G45/02], [CPC: C10G45/32], [CPC: C10G45/44], [CPC: C10G45/58] or [CPC: C10G47/00] {in the presence of hydrogen from a special source or of a special composition or having been purified by a special treatment}