asphaltene


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asphaltene

[a′sfȯl‚tēn]
(materials)
Any of the dark, solid constituents of crude oils and other bitumens which are soluble in carbon disulfide but insoluble in paraffin naphthas; they hold most of the organic constituents of bitumens.
References in periodicals archive ?
Based on some microstudy on aging of the asphalt binder, it is seen that there are two reasons for the decrease of molecular diffusion of aged asphalt: on the one hand, the molecular size of asphaltene, resin, and aromatic decreases; on the other hand, free volume space for saturate reduces.
The organic content, which ranges from -25-35 wt%, depending on product, is a high softening point composition (~290[degrees]F) containing approximately five times the asphaltene structure and 2-1/2 times more combined resins and asphaltenes than common bitumen (table 1).
Standardization of the spectroscopy method UV-Visible to determine the asphaltene content in heavy crude oils
Thus, these oils are light oils with low viscosity, which is consistent with high concentrations of saturated hydrocarbons (>75%), aromatic hydrocarbons (4.43-16.23%), and low concentrations of NSO and asphaltene (<5%) in terms of group compositions.
SDA is an economical process to remove concentrated asphaltene or pitch, the dirtiest part of HO and EHO [70], and has been widely studied since the first attempts to separate or distilling oils in the 1920s [71,72].
Groundbreaking insights into asphaltene and achieving a successful flow treatment program feature in two presentations.
Use of the Spectroscopy Method UV-Visible to Determination of Asphaltene in Extra Heavy Crude Oils
"Molecular weight and specific gravity distributions for athabasca and cold lake bitumen and their saturate, aromatic, resin, and asphaltene fractions".
After the reaction without catalyst, the have increased by 1.79% and 1.72%, respectively, and the resins and asphaltene have decreased by 3.18% and 0.33% at the same time.
According to the company, the ROSE unit will split residue from a mix of crude oils into deasphalted oil (DAO) and asphaltene, allowing the refinery to upgrade a larger proportion of its oil intake into high-grade products.
The ROSE unit will split residue from a mix of crude oils into deasphalted oil, or DAO, and asphaltene, allowing the refinery to upgrade a larger proportion of its oil intake into high-grade products.