| 摘要 |
A method of refining a petroleum product to remove aromatics and to separate paraffinic oils and waxes is provided. The method involves the utilization of phase equilibria wherein crystallized or solidified waxes, normally present in the pretroleum product, are used to remove oils from a liquid solvent phase containing dissolved aromatics present in the unrefined petroleum product. The wax containing the oils (26) is separated from the aromatic-containing solvent and is further processed to separate the waxes and oils (28). For petroleum products containing little, if any, wax, additional wax may be added and recycled back for further use in removing oils from the petroleum product. The method has particular application in preparing lubricant oils having a high viscosity index, where the presence of aromatics and wax can be detrimental.
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