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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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).
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].
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.