What is the distribution of colloids and asphaltenes in various oil products?
Thread Content
What is the distribution of colloids and asphaltenes in various oil products?
The distribution principle of gum and asphaltene is: The heavier the oil, the more colloids and asphaltenes it contains, and there is almost no colloid in gasoline. ； Coal and diesel oil contain trace amounts of colloids (causing the oxidation stability of the oil to deteriorate) ； Asphalt contains a large amount of colloids and asphaltenes. During the processing of crude oil, colloids and asphaltenes are mainly concentrated in the vacuum residue. Based on the four-component analysis, it can be seen that the mixed content of colloids and asphaltenes (pentane asphaltene) in the vacuum residue of crude oil in various regions of my country is roughly between 25% and 70%. If there is a residual solvent deasphalting process, gum and asphaltene will be transferred to the deoiled asphalt.
The heavier the oil, the higher the content of gums and asphaltenes. Gasoline and diesel oil contain very little, and residual oil contains the most.
Gum and asphaltenes mainly exist in vacuum heavy oil and are one of the main components of asphalt. Liaohe crude oil contains high amounts of colloids and asphaltene, making it a good raw material for asphalt production.
Gasoline basically does not contain colloids and asphaltenes. Diesel oil contains about 1% of colloids and asphaltenes. Recycled oil contains about 3% of colloids and asphaltenes. Oil slurry contains about 7% of colloids and asphaltenes. Regular slag contains about 10% of colloids and asphaltenes. Reduced residue contains about 30% of colloids and asphaltenes.
Gasoline does not contain asphaltenes and contains a small amount of gum. Asphaltenes are insoluble in gasoline. The distribution regularity of gums and asphaltenes in petroleum products is not very regular. Different crude oils have different distribution states because the structures of these two substances are particularly complex.