1、The stability of asphaltenes in crude oil is mainly dependent on the asphaltenes solubility of crude oil.
2、Data show that the compositions and structures of the two asphaltenes are different.
3、The presence of nitrogen inhibits the increase of asphaltenes in slurry oil.
4、Generally, polar compounds or asphaltenes deposited from the crude oil onto mineral surfaces cause the oil-wet condition.
5、To understand better the complex chemical structure of asphaltenes, information obtained by various analytical methods should be combined.
6、Not mainly the ageing of resins and asphaltenes but that of saturates and aromatics cause the ageing of asphalt.
7、The main components of oil are saturated hydrocarbons, aromatic compounds, asphaltenes, resins, and so on. It is difficult to degrade these substances which are bad for aquatic life.
8、The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
9、The additive composition allows fuels which are prone to separation, for example blended fuels or fuels having a high content of asphaltenes, to be used successfully.
10、The results showed that the aromatic ratio, heteroatom and metal contents contribute to the high polarity of the asphaltenes. This is the basis of other properties of heavy oil.
