Determination of Aromatic and Naphthene Rings in Aromatics from Petroleum Fractions

Martin, C. C.; Sankin, Albert

doi:10.1021/ac60074a002

Cited by 28 publications

(8 citation statements)

References 20 publications

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“…Cuts 6 and 7 of the aromatic portion were subjected to the correlation of Martin and Sankin (16). Specific dispersions were calculated from density, refractive index, and molecular weight by the method of Lipkin and Martin (12).…”

Section: Discussionmentioning

confidence: 99%

Analysis of Hydrocarbon Fraction of Gilsonite

Sugihara¹,

McCullough²

1956

Anal. Chem.

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It has been shown that 4 to 8% of hydrocarbon material can be separated from gilsonite by chromatography.This material has been named the "giltene fraction" of gilsonite. The giltenes contain 30 to 40% of aromatic molecules and 60 to 70% of naphthene molecules.A REVIEW of the literature on gilsonite (1, 3, 5, 14) revealed a lack of information on what could be accomplished by chromatographic techniques. Such an investigation was therefore undertaken. Chromatographic studies have been made on Canadian tar sands (9), LaBrea tar ( 23), a high-boiling shale oil distillate (6), and asphalt (8).In this investigation the initial separation of gilsonite was effected using Magnesol as the adsorbent with Celite added to increase permeability of the bed. The low cost and ready availability, as well as its demonstrated efficiency in the separation of carbohydrate derivatives (15) and products of pyrolysis of gilsonite (20), made the adsorbent attractive. Because gilsonite is highly soluble in benzene, its use in this chromatographic procedure appeared desirable. REAGENTS AND APPARATUSThe following reagents are used: Magnesol, a hydrated magnesium acid silicate, Westvaco Chlorine Products Co., South Charleston, W. Va.Celite, a diatomaceous earth, Johns-Manville Co., New York, N. Y.Silica gel No. 12, 28 to 200 mesh, Davison Chemical Corp., Baltimore, Md. 2,2,4-Trimethylpentane, spectral grade, Distillation Products Industries, Rochester, N. Y.The equipment needed is a Beckman spectrophotometer, Model DU; a Todd precise fractionation assembly with fractionating column, 5 mm. in inside diameter, Monel metal, spiralpacked; and a Perkin-Elmer recording infrared spectrophotometer, Model 21.

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Section: Discussionmentioning

confidence: 99%

Analysis of Hydrocarbon Fraction of Gilsonite

Sugihara¹,

McCullough²

1956

Anal. Chem.

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“…Van Nes and van Westen have assumed kata-condensed six-membered rings, with the idea that this should represent a good approach to the average for petroleum oils. Other investigators have made somewhat different assumptions (11,13), which nonetheless result in values for % Ca, % Cv, and % Cp, which differ very little from those obtained by the n-d-M method. Hastings and coworkers have recently concluded that the application of the n-d-M method to pure naphthenes indicates that these assumptions are adequate (7).…”

Section: Standard Deviotionmentioning

confidence: 98%

Carbon-Type Analysis of Lubricating Oil. Significance of Pure Compound Data

King¹,

Kust²,

Kurtz³

1960

Anal. Chem.

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Carbon-type analysis methods for obtaining the composition of the viscous fractions of petroleum have been developed and justified primarily with detailed analytical data on such materials. Several methods were evaluated, using data for pure compounds of high molecular weight synthesized by API Research Project 42. This study confirms the basic validity of the carbon-type analysis correlations. Data for noncondensed multicyclic aromatics do not agree well with the correlations for petroleum fractions. This leads to the conclusion that the multinuclear aromatics in petroleum are mainly of the condensed variety, in agreement with the work of API Research Project 6 on such materials.More detailed analytical data on the viscous fractions of petroleum are needed.

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“…From the data given in Tables I and II it is also possible to calculate relative refractive dispersions. Dispersion has been used in the petroleum industry for many years as an aid in the characterization of oil fractions (5)(6)(7). From an analytical point of view, the specific dispersion X 104 d where tif = refractive index at 4861 A. nc = refractive index at 6563 A. d = density, all at the same temperature is to be preferred to the dispersion itself.…”

Section: Apparatus and Proceduresmentioning

confidence: 99%