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UOP99-82
Pentane-Insoluble Matter in Petroleum Oils Using a Membrane Filter
8 стр.
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This method is for the determination of pentane-insoluble matterin petroleum oils and is applicable to samples that are reasonablyfluid at 37 C or lower temperatures. This method covers the rangeof 0.01% to about 20% pentane-insolubles. Solid particulatematerials interfere. More viscous or solid materials such asasphalts may be handled by the modification described in theAPPENDIX. The data provided by this method may be employed as anindex to the coking tendency of petroleum oils when consideringtheir suitability as charge stocks to cracking or otherprocesses.

Since asphaltenes are commonly defined as the material presentin oil fractions that is not soluble in light paraffinic solvents,usually pentane or heptane, this method determinespentane-insoluble asphaltenes while UOP Method 614 determinesheptane-insoluble asphaltenes.