PROPERTIES OF CRUDE OILS
Crude oils differ appreciably in their properties according to origin and the ratio of the different components in the mixture. Lighter crudes generally yield more valuable light and middle distillates and are sold at higher prices. Crudes containing a high percent of impurities, such as sulfur compounds, are less desirable than low-sulfur crudes because of their corrosivity and the extra treating cost. Corrosivity of crude oils is a function of many parameters among which are the type of sulfur compounds and their decomposition temperatures, the total acid number, the type of carboxylic and naphthenic acids in the crude and their decomposition temperatures. It was found that naphthenic acids begin to decompose at 600°F. Refinery experience has shown that above 750°F there is no naphthenic acid corrosion. The subject has been reviewed by Kane and Cayard.20 For a refiner, it is necessary to establish certain criteria to relate one crude to another to be able to assess crude quality and choose the best processing scheme. The following are some of the important tests used to determine the properties of crude oils.

مواضيع ذات صلة

سلوك المعادن الطينية في علاقتها مع الماء

تصنيف النفط الخام Classification of Crude Oils

التحليل المطلق Ultimate Analysis

المكونات الرئيسية للنفط الخام الموجود في منطقة القيارة

نفط خام القيار

النفط الخام ومكوناته

النفط والطاقة Oil and Energy

مزائج اسفلت – اسفلتين

أساليب تحوير المواصفات الريولوجية للاسفلت

صفات الاسفلت الريولوجية Properties of Asphalt Rheological

استخدامات الاسفلت Asphalt Uses of

التركيب الكيميائي للاسفلت Chemical Composition of Asphalt