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6506-chemistry - ASPHALT CHEMISTRY MOLECULAR STRUCTURE...

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1 ASPHALT CHEMISTRY MOLECULAR STRUCTURE - Diverse molecular structures - Predominantly composed of carbon and hydrogen. - Most molecules contain one or more heteroatoms, such as sulfur, nitrogen and oxygen. - The type of molecular structure is more important than the total amount of each element present. TYPICAL ELEMENTAL ANALYSIS (Petroleum Asphalts) ELEMENT PERCENT Carbon 83 - 87 Hydrogen 10 -11 Sulfur 1 - 5 Nitrogen 0.3 - 1,1 Oxygen 0.2 - 0.8 Vanadium, ppm 4 - 1400 Nickel, ppm 0.4 - 110 ______________________________________
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