Setting new standards

Crude oils that are difficult to process are cheaper, but for refinery operators they represent a risk of increased corrosion due to their high content of naphthenic acid and sulfur. Purchasers also face risks, caused for example by these same high levels. Refinery operators must balance the cost benefits against the risks and also against the costs of corrosion control when processing these crude oils. A reliable acid number determination is a crucial part of corrosion control. Our guest authors – Larry Tucker and Lori Carey of Metrohm USA as well as Bert Thakkar and Bryce and Colette McGarvey of Imperial Oil – were involved in the development of the new ASTM Method D8045 for acid number determination. Here, they report on the method and how it came to be.