March 2017

Special Focus: Corrosion Control

New method to measure TAN of crude oil and refinery distillation fractions

Many refiners look at discounted opportunity crudes as a way to improve their margin spread. The growing varieties of discounted opportunity crudes on the market contain certain risks for the purchaser, such as high naphthenic acid or sulfur content.

Many refiners look at discounted opportunity crudes as a way to improve their margin spread. The growing varieties of discounted opportunity crudes on the market contain certain risks for the purchaser, such as high naphthenic acid or sulfur content. Sulfur compounds and naphthenic acids are among the many species that contribute to the corrosive nature of crude oils and refined fractions. Therefore, opportunity crudes with high naphthenic acid and sulfur content carry an ongoing risk of increased corrosion. The refiner must balance the cost benefit vs. the risk, and the cost of corrosion control, when processing these crudes. Occurrence of naphthenic acids Naphthenic acids are found in m

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