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Detailed Characterization of Petroleum Sulfonates by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
journal contribution
posted on 2016-03-07, 00:00 authored by Fernando
A. Rojas-Ruiz, Andrea Gómez-Escudero, Zarith Pachón-Contreras, Álvaro Villar-García, Jorge A. Orrego-RuizPetroleum
sulfonates obtained from heavy vacuum gas oil (HVGO)
were characterized by negative electrospray ionization Fourier transform
ion cyclotron resonance mass spectrometry [(−) ESI FT-ICR MS]
to better understand the chemical nature of their surface-active components.
Electrospray ionization (ESI) analysis showed that sulfonates contain
mainly O3S, O3S2, O4S, and NO3S classes, which means that the sulfonation
reaction does not occur selectively for aromatic hydrocarbon (HC)
class compounds because it also reacts with N, S, and O heteroatom
classes. Because sulfonates were separated by solubility into lipophilic
and hydrophilic categories, it was confirmed that the same classes
compose hydrophilic and lipophilic sulfonates. Moreover, this procedure
revealed that lipophilic sulfonate extracts contain organic acids
(O2 class) that are related to the total acid number of the starting
HVGO. However, selective isolation of the surface-active species using
the “wet-silica” procedure allowed for detection that
these compounds have a non-surface-active character because they do
not interact with the water phase. The new structural information
disclosed about petroleum sulfonates and their raw materials might
encourage further studies on the rational design and synthesis of
novel petroleum surfactants with the desired properties for industrial
applications, such as chemical enhanced oil recovery (CEOR).
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Fourier Transform Ion Cyclotron Resonance Mass Spectrometry Petroleum sulfonatespetroleum sulfonateschemical naturelipophilic sulfonatesPetroleum Sulfonatessulfonation reactionHCO heteroatom classesnovel petroleum surfactantsO 2 classMSoil recoverywater phasevacuum gas oilclass compoundslipophilic sulfonate extractsElectrospray ionization3S classesCEORelectrospray ionization Fourieracid numberHVGOO 3S O 3S O 4SESI
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