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US 11,821,868 B2Granted
Detection and analysis of olefins in petroleum by electrospray ionization mass spectrometry
AssigneeExxonMobil Technology and Engineering Company
InventorsAshley M. Wittrig, Kuangnan Qian, Thomas R. Fredriksen
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Abstract
A method for detecting and analyzing olefins in petroleum by electrospray ionization mass spectrometry can include obtaining a hydrocarbon sample comprising at least about 90 wt % of saturate compounds; producing a solution comprising the hydrocarbon sample and a metal salt, the metal salt comprising a metal ion; forming olefin-metal ion complexes by electrospray ionization; and detecting the olefin-metal ion complexes using mass spectrometry.
Claims20
A method comprising:
- obtaining a hydrocarbon sample comprising at least about 90 wt % of saturate compounds, wherein the hydrocarbon sample has a viscosity of 1 to 100 cSt at 100° C., in order to detect low olefin content in high-viscosity hydrocarbon samples;
- producing a solution comprising the hydrocarbon sample and a metal salt, the metal salt comprising a metal ion;
- forming olefin-metal ion complexes by positive ion electrospray ionization (ESI);
- and
- detecting the olefin-metal ion complexes using mass spectrometry (MS).
2 more elements
A method comprising:
- obtaining a hydrocarbon sample comprising at least about 90 wt % of saturate compounds,
- wherein the hydrocarbon sample has a viscosity of 1 to 100 cSt at 100° C., in order to detect low olefin content in high-viscosity hydrocarbon samples,
- wherein the hydrocarbon sample is selected from the group consisting of a base stock, a bright stock, and any combination thereof, and
- wherein the hydrocarbon sample is produced from solvent extraction of vacuum residue;
- producing a solution comprising the hydrocarbon sample and a metal salt, the metal salt comprising a metal ion;
- forming olefin-metal ion complexes by positive ion electrospray ionization (ESI);
- and
- detecting the olefin-metal ion complexes using mass spectrometry (MS).
5 more elements
Dependencies are inferred from the claim text.