September 2001

Process Technology/Refining

Improve desalter operations

Applying a polymeric dispersant, this refiner increased daily throughput by 5% and increased run lengths

Kremer, L., Baker Petrolite Corp.; Lessard, R. B., Lindemuth, P. M., Lozynski, M., ONDEO Nalco Energy Services, Operations Ltd.

Asphaltene dispersants are traditionally used as antifoulants. These polymers have great utility with common desalting problems associated with refining heavier asphaltic crude oils. These polymers are used as adjuncts to a primary demulsifier. In particular, processing heavy, opportunity crudes can foster a desalter dysfunction – asphaltene instability. Such process conditions shorten run length for the desalter. In this case history, a Canadian refiner sought processing improvements to mitigate solids creation and deposition in the desalter. Background. A particular desalter dysfunction – asphaltene instability – can generate large flocs. This malady may cause solids to

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