Identification of a series of C25-C40 acyclic isoprenoid hydrocarbons in crude oils

Albaigés, Joan; Borbón, Javier F.; Salagre, P.

doi:10.1016/s0040-4039(01)85341-7

Cited by 43 publications

(7 citation statements)

References 5 publications

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“…Our observation on the presence of isoprenoid structures in the wax is supported by earlier studies in which the presence of such isoprenoid structures in crude oil, gas oil, kerosene, and shale have also been reported earlier by many workers. ,− The absence of C 17 isoprenoid has also been reported in some of the studies made earlier . The identification of these compounds in wax derived from tank bottom sludge can help in understanding the mechanism of formation of tank bottom sludge, as well the geochemical origin of crude oil.…”

Section: Resultssupporting

confidence: 89%

Identification of Acyclic Isoprenoid Hydrocarbons in Wax Derived from Tank Bottom Sludge

2004

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The oil-soft wax fraction of the microcrystalline wax, extracted from the Bombay High crude tank bottom sludge (Indian origin), has been characterized using gas liquid chromatography (GLC), 1H and 13C nuclear magnetic resonance (NMR), and gas liquid chromatography−mass spectroscopy (GLC−MS). A series of saturated acyclic isoprenoid hydrocarbons have been identified in this wax. These structures have been confirmed by recording GLC-MS spectra of the oil-soft wax fraction at reduced ionization potentials of 30 and 20 eV and also recording the spectra of two known available standards, namely, pristane and phytane.

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Section: Resultssupporting

confidence: 89%

Identification of Acyclic Isoprenoid Hydrocarbons in Wax Derived from Tank Bottom Sludge

2004

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“…Despite their low abundance, regular series of acyclic isoprenoid hydrocarbons extending towards the C 45 homologues have also been found in a number of crude oils (Albaigés et al, 1978;Albaigés, 1980). The structural similarity of these long chain acyclic isoprenoid hydrocarbons and the cyanobacterial polyprenols identified in this study suggests a generic relationship between both compound classes and it is likely that acyclic isoprenoid hydrocarbons can be formed from polyprenols by maturation.…”

Section: Resultsmentioning

confidence: 57%

Occurrence of C35–C45 polyprenols in filamentous and unicellular cyanobacteria

Bauersachs

Schouten

Compaoré

et al. 2010

Organic Geochemistry

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a b s t r a c tPolyprenols, regular (head-to-tail) isoprenoid alcohols with 7-9 prenyl units, were tentatively identified in several cultivated cyanobacteria. Heptaprenol (C 35 ), octaprenol (C 40 ) and a suite of nonaprenols (C 45 ) were present in unicellular and filamentous non-heterocystous cyanobacteria, while they were absent in heterocystous species. Structurally related components, e.g. long-chain (PC 35 ) acyclic regular isoprenoid hydrocarbons, have been reported from petroleum and cyanobacterial polyprenols may be potential precursors.

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“…3A), it is a regular, head-to-tail linked isoprenoid (II; see Appendix for structural formulas). Albaigès et al (1978) found this compound to be a minor constituent of crude oils within a series of C 25 -to C 40 -isoprenoid hydrocarbons. In the Hole 474A samples, the concentration of Compound II increases with depth ( Fig.…”

Section: Site 474 Mouth Of Gulf Of Californiamentioning

confidence: 99%

Organic Petrography and Extractable Hydrocarbons of Sediments from the Gulf of California, Deep Sea Drilling Project Leg 64

Rullkötter¹,

Dick²,

Welte³

1982

Initial Reports of the Deep Sea Drilling Project

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We determined the quantity, type, and maturity of organic matter in Pleistocene sediment from the Gulf of California. We analyzed extractable hydrocarbons by capillary column chromatography and combined gas chromatography/mass spectrometry (GC/MS). We investigated kerogens by Rock-Eval pyrolysis and microscopy. Organic carbon is mostly between 1 and 2°7o in samples from the mouth of the Gulf (Holes 474 and 474A) and in the Guaymas Basin (Holes 478, 481, and 481 A) and between 2 and 4% at the Guaymas Basin slope (Hole 479). We determined total extracts of about 10 mg/g C org for all samples. The organic matter seems to be mostly terrigenous in Holes 474,474A, 478,481, and 481 A, as indicated by the extractable hydrocarbons and the macefal analysis. But we believe that the large amounts of steroid and triterpenoid hydrocarbons in some samples indicate marine and bacterial biomass, which probably is finely disseminated and cannot readily be identified under the microscope. Rederived, inert organic matter is common in these holes. In Hole 479, the terrigenous contribution is less pronounced, and algal liptinites exceed terrigenous liptinites. But in all samples, perylene is the predominant aromatic hydrocarbon. Optical and chemical investigations show that the organic matter in the Gulf of California sediment is immature, despite the high heat flow and local basaltic intrusions. We could not establish a regular maturity trend with increasing depth.

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Identification of a series of C25-C40 acyclic isoprenoid hydrocarbons in crude oils

Cited by 43 publications

References 5 publications

Identification of Acyclic Isoprenoid Hydrocarbons in Wax Derived from Tank Bottom Sludge

Identification of Acyclic Isoprenoid Hydrocarbons in Wax Derived from Tank Bottom Sludge

Occurrence of C35–C45 polyprenols in filamentous and unicellular cyanobacteria

Organic Petrography and Extractable Hydrocarbons of Sediments from the Gulf of California, Deep Sea Drilling Project Leg 64

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