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Properties of asphaltenes and asphalts from various sources

โœ Scribed by E. P. Glozman; R. S. Akhmetova

Publisher
Springer US
Year
1975
Tongue
English
Weight
225 KB
Volume
11
Category
Article
ISSN
0009-3092

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The asphaltenes from a waxy crude were isolated using several different n-paraffinic solvents at various temperatures. As the carbon number of the precipitant increased from C, to C,, the amount of solvent required to initiate precipitation (onset) increased, consistent with an increase in solvatin

Dynamic nuclear polarization in suspensi
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Nuclear magnetic resonance and the Overhauser effect type dynamic nuclear polarization were used to study some colloidal suspensions of asphaltene obtained from MC-30 liquid asphalt in a weak magnetic ยฎeld of 1.437 mT. Intermolecular spinยฑspin interactions occur between diffusing nuclear spins in th

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The asphaltenes from hydrogenated coal extract (product A) as well as from hydrogenated lowtemperature coal tars (products B and C) obtained from three bituminous coals were investigated. The asphaltenes were separated into basic (BI and acidic/neutral (A/N) fractions by precipitation of HCI adducts