Separation of Paraffin-Cycloparaffin Portion of Naphtha into Normal, Branched, and Cycloparaffins

Norris, M. S.; O'Connor, J. G.

doi:10.1021/ac60146a038

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…Desorption of Normal Hydrocarbons. The authors have reported (8) that adsorbed normal paraffins (chain length from Cg to C10) can be desorbed from a column of Molecular Sieves, Type 5-A, by elution with n-pentane. Apparently, the pentane enters the cavities of the sieves and forms a continuous phase with the external area; thus, it permits the adsorbed hydrocarbons to diffuse continuously into the external solution until an equilibrium concentration of desorbed hydrocarbon is obtained.…”

Section: Discussionmentioning

confidence: 99%

Molecular Sieve Adsorption. Application to Hydrocarbon Type Analysis

O'Connor¹,

Norris²

1960

Anal. Chem.

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Section: Discussionmentioning

confidence: 99%

Molecular Sieve Adsorption. Application to Hydrocarbon Type Analysis

O'Connor¹,

Norris²

1960

Anal. Chem.

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“…This is not an easy task. Fractionation of paraffins into normal paraffins, isoparaffins, and cycloparaffins can be achieved by treatment with urea or molecular sieve . However, complete separation of isoparaffins from cycloparaffins, and further separation of the latter by types and ring-number, is much more complex.…”

Section: Introductionmentioning

confidence: 99%

Diesel Fuel Analysis by GC-FIMS: Normal Paraffins, Isoparaffins, and Cycloparaffins

Briker¹,

Ring²,

Iacchelli³

et al. 2001

Energy Fuels

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A reliable and convenient characterization method that provides a detailed hydrocarbon composition profile for transportation fuels is an important part of process optimization directed at reducing regulated emissions. In our previous study (Briker, Y.; Ring, Z.; Iacchelli, A.; McLean, N.; Rahimi P. M.; Fairbridge, C.; Malhotra, R.; Coggiola, M. A.; Young, S. E. Energy Fuels 2001, 15 (1), 23-37) we described the development of a modified gas chromatography, field ionization mass spectrometry method for detailed hydrocarbon type characterization of diesel fuel. The method proved to be an invaluable technique for rapid analysis of diesel fuel. It was less timeconsuming and more informative than the existing mass spectrometry methods, from a characterization point of view, and it was user-friendly and did not require any major modification to an existing commercial instrument, from an instrumentation point of view. This method correlated well with the other methods for total aromatic and saturate groups, and the data for aromatic subgroups were verified against the data obtained from other mass spectrometric and nonmass spectrometric techniques. This paper describes a continuing effort to verify the new GC-FIMS method and produce correlations for the saturate groups. The purpose of this study was to validate GC-FIMS measurements of various saturate types using samples of physically separated fractions, enriched in the individual types by various LC methods described in the literature. In this study, the non-normal paraffinic portion of the saturate fraction of the selected diesel cut was separated into iso-and cycloparaffins. The normal paraffins were quantitatively removed by molecular sieve and additionally determined by high-resolution gas chromatography of the saturate fraction. The contents of iso-and cycloparaffins were calculated gravimetrically in each separated fraction and also analyzed by mass spectrometry methods. The results obtained for the saturate types by different methods were all in good agreement, which demonstrates the applicability of the GC-FIMS method for saturates analysis.

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Die volumetrische Methode zur Bestimmung von n‐Paraffinen in flüssiger Phase mit 5 A‐Molekularsieben

Rennhak¹,

Eppert²,

Schinke³

1965

J. Prakt. Chem.

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Es wird eine Ausführung der volumetrischen Methode zur Bestimmung von n‐Paraffinen mit 5 A‐Molekularsieben beschrieben, die gestattet, an Kohlenwasserstoffen niedriger und höherer Siedelage exakte Ergebnisse zu erhalten. Die Sorption der höheren n‐Paraffine erfolgt bei 100°C unter Druck. In der vorliegenden Arbeit wurde die Methode auf Kohlenwasserstoffgemische des Siedebereichs von etwa 50–350°C angewendet. Die Standardabweichung der n‐Paraffinbestimmungen betrug ± 0,3%.

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Separation of Paraffin-Cycloparaffin Portion of Naphtha into Normal, Branched, and Cycloparaffins

Cited by 8 publications

References 12 publications

Molecular Sieve Adsorption. Application to Hydrocarbon Type Analysis

Molecular Sieve Adsorption. Application to Hydrocarbon Type Analysis

Diesel Fuel Analysis by GC-FIMS: Normal Paraffins, Isoparaffins, and Cycloparaffins

Die volumetrische Methode zur Bestimmung von n‐Paraffinen in flüssiger Phase mit 5 A‐Molekularsieben

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