New method prevents desalter upsets from blending incompatible crudes

Combining a proprietary asphaltene stability index (ASI) and a laboratory simulation of the desalting process can predict desalter problems in a refinery when incompatible crude blends are suspected.These tests can determine corrective action that includes blending strategies to avoid asphaltene instability and chemical treatment programs that enable the refinery to run difficult blends.Refineries are processing more opportunity crude oils due to fluctuating oil prices and the squeeze on profit margins. In some cases, the crude unit is required to run crude oils for which the operators have no experience so that potential problems are unknown.Often, stable crude oils can form unstable mix...

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