Abstract
The structural characteristics of dewatered petroleum sludge and the fraction boiling above 350°C are compared, on the basis of physicochemical research methods. The structure of the residue boiling above 350°C is more aromatic than the initial sludge and resembles that of heavy petroleum residues. This suggests that hydroconversion of the >350°C fraction and the heavy petroleum residues will also be similar. Hence, the sludge component boiling above 350°C may prospectively be processed by hydroconversion in the presence of ultrafine catalysts.
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