Crude Oil Compatibility

The mixing of crude oils can cause the precipitation of asphaltenes (incompatibility) and result in the rapid fouling of preheat exchangers and the sudden coking of pipestill furnace tubes.

Soluble Solutions' Oil Compatibility Model (OCM) can provide a conservative prediction of the compatibility or incompatibility of any number of crude or processed oils.

With the OCM and a few tests on the crude with mixtures of toluene and n-heptane, the insolubility number (measure of asphaltene solubility) and the solubility blending number (measure of oil solvency for asphaltenes) of each crude can be determined. Afterwards, the proportions of any number of oils in a mixture and the correct order of blending can be determined to assure that mixture is compatible.

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