Carbon-Type Composition of Viscous Fractions of Petroleum.  Density-Refractivity Intercept Method

Kurtz, S. S.; King, R. W.; Stout, W. J.; Peterkin, Melvin E.

doi:10.1021/ac60139a014

Cited by 25 publications

(10 citation statements)

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“…The refractivity-intercept-density method of Kurtz et al (1958) is a triangular graphical relation between percentage carbon as aromatic, naphthenic, or paraffinic; refractivity intercept (R¡); and density. This method requires that the aromatic percentage must be known.…”

Section: Introductionmentioning

confidence: 99%

“…A number of other procedures have been discussed in various sources (Boelhower et al, 1954;Kurtz et al, 1958Kurtz et al, , 1936Kurtz et al, ,1937Van Nes and Van Westen, 1951;Waterman et al, 1958). However, all of the existing methods are useful only for high-boiling virgin fractions and are accurate only for data on which the method is based.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of the Composition of Petroleum Fractions

Riazi¹,

Daubert²

1980

Ind. Eng. Chem. Proc. Des. Dev.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of the Composition of Petroleum Fractions

Riazi¹,

Daubert²

1980

Ind. Eng. Chem. Proc. Des. Dev.

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“…Empirical relations expressing molar volumes of normal paraffins in terms of chain length were presented by Huggins (J) and Calingaert (6). Kurtz and coworkers gradually expanded this empirical approach to encompass branched chains, unsaturations, and ring structures (7)(8)(9)(10). A graphical densimetric method was developed by van Krevelen for the structural analysis of coal (11)(12)(13)(14)(15)(16).…”

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confidence: 99%

Relations between molecular volume and structure of hydrocarbons at 20.deg.

Hirsch¹

1970

Anal. Chem.

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Use new estimates for formation constants. If this is of no avail, make a new assumption about the equilibrium stoichiometry. In some cases an incorrect assumption may lead to extremely slow convergence of the minimization process.6. Use PL614 to plot the spectra of individual components. A glance at the spectra will reveal whether the results are consistent. ACKNOWLEDGMENTThe author thanks T. Kemppainen for assistance in performing the spectrophotometric measurements. A grant awarded by the Emil Aaltonen Foundation is gratefully acknowledged.

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“…= 16.28m + 13.15m + 9.7m -6.2m + 31.2 (7) where m = number of chain carbon atoms m = number of carbon atoms in rings m = number of carbon atoms at ring junctions m = number of double bonds 31.2 = terminal constant, or molecular increment of volume This equation is set up in terms of the type of carbon atoms and the number of double bonds but does not specifically provide terms for carbon atoms and hydrogen atoms as such. This general equation has been found very useful (9,10,28,43,44,50).…”

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confidence: 99%