E.p.r. u.v.-vis. and h.p.l.c. studies of the behaviour of vanadyl-mesotetraphenyl-porphyrin in the presence of perfluorinated acids

Metal extraction from vanadyl-mesotetraphenylporphyrin (VO-TPP), dissolved in toluene, by means of trifluoroacetic acid and isoperfluorooctanoic acid, was studied as a model for acid demetallization in crude oils. E.p.r., u.v.-vis. and h.p.l.c. techniques have been used. Evidence of the formation of...

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Bibliographic Details
Published in:Fuel (Guildford) 1992, Vol.71 (10), p.1153-1159
Main Authors: Lerda, Donata, Bolzacchini, Ezio, Montanari, Luciano
Format: Article
Language:English
Subjects:
Applied sciences
crude oil
Crude oil, natural gas and petroleum products
e.p.r
Energy
Exact sciences and technology
Fuels
h.p.l.c
Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units
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Summary:Metal extraction from vanadyl-mesotetraphenylporphyrin (VO-TPP), dissolved in toluene, by means of trifluoroacetic acid and isoperfluorooctanoic acid, was studied as a model for acid demetallization in crude oils. E.p.r., u.v.-vis. and h.p.l.c. techniques have been used. Evidence of the formation of an adduct between VO-TPP and perfluorinated acids in toluenic solutions has been confirmed, while in pure acid solution a different behaviour has been observed. Demetallization of the porphyrin occurs in isoperfluorooctanoic acid whilst in trifluoroacetic acid oxidation of vanadium occurs after the demetallization.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(92)90097-8