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Figure 1 Comparison of crude oils density/mid-boiling point basis. (From Ref. 4.)
crude. Such attempts have only partially succeeded. In the United States,
crude oils are classified into three types:
1. Paraffinic: paraffinic hydrocarbons with a relatively lower
percentage of aromatics and naphthenes
2. Naphthenic: cycloparaffins in a higher ratio and a higher amount
of asphalt than in paraffinic crudes
3. Asphaltic: fused aromatic compounds and asphalt in higher
amounts
Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.
