Abstract
ABSTRACT An HPLC system is used to separate deasphalted vacuum resids of heavy oils, into saturates, aromatics and two types of resins at preparative scale. The separation is achieved using two silica and one cyano bonded silica columns, and cyclopentane, a mixture of chloroform-methanol and dichleramethane as solvents. Automated repetitive injection is required. Recoveries of the sample are around 100%.
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