Maltenes and asphaltenes of petroleum vacuum residues: Physico-chemical characterization

B. K. Sharma, C. D. Sharma, S. D. Bhagat, S. Z. Erhan

Research output: Contribution to journalArticlepeer-review


Solvent separation is frequently applied to petroleum vacuum residues to reduce the coke-forming tendencies of these materials. This process is capable of removing all or a substantial amount of asphaltenes from feedstocks that are destined for further processing and thus applied as the first step of refining. Maltenes and asphaltenes obtained from vacuum residues of Heera (HVR) and Jodhpur (JVR) Indian crude oils using n-hexane, n-heptane, and soluble and insoluble fractions obtained using ethyl acetate, were characterized for elemental analysis, molecular weight, conradson carbon residue (CCR), specific gravity, and pour points. The resulting degree of removal of asphaltenes ranged from 10-28 wt% of the HVR and 25-50 wt% of the JVR. The increasing trend of the American Petroleum Institute (API) gravity and the decreasing trend of CCR and pour point are observed with the increase in removal of asphaltenes.

Original languageEnglish (US)
Pages (from-to)93-104
Number of pages12
JournalPetroleum Science and Technology
Issue number1-2
StatePublished - Jan 2007
Externally publishedYes


  • Asphaltenes
  • Elemental analysis
  • Maltenes
  • Petroleum
  • Vacuum residue

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology


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