Cyclopentane and Neohexane in Petroleum

Marschner, Robert F.; Burney, D. E.

doi:10.1021/ie50510a059

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…Cyclopentane (CP) and neohexane (22MB) are important industrial chemicals and typical azeotropic mixtures [5]. CP can be used as a foaming agent as well as to produce cyclopentanol and cyclopentanone [6].…”

Section: Introductionmentioning

confidence: 99%

Principle and Feasibility Study of Proposed Hydrate-Based Cyclopentane Purification Technology

Sun

Yuan

et al. 2023

Energies

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The separation of azeotropic mixtures has conventionally been one of the most challenging tasks in industrial processes due to the fact that components in the mixture will undergo gas–liquid phase transition at the same time. We proposed a method for separating azeotropes using hydrate formation as a solid–liquid phase transition. The feasibility of hydrate-based separation is determined by analyzing the crystal structure and chemical bonds of hydrate. Taking the azeotrope cyclopentane and neohexane in petroleum as an example, cyclopentane (95%) was purified to 98.56% yield using the proposed hydrate-based cyclopentane purification technology. However, this is difficult to achieve using conventional distillation methods. The proposed method is simple in operation and yields a good separation effect. This study provides a new method for separating cyclopentane and neohexane.

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Section: Introductionmentioning

confidence: 99%

Principle and Feasibility Study of Proposed Hydrate-Based Cyclopentane Purification Technology

Sun

Yuan

et al. 2023

Energies

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“…By 2023, the global market of cyclopentane is expected to reach US$ 335.7 million, with an annual growth rate of 6.7% . Cyclopentane resource has been detected in light petroleum fractions like naphtha , and natural gas liquid; however, it is hardly separated as a commercial grade product through traditional fractionation operations owing to the formation of close-boiling/azeotropic mixtures with hydrocarbons possessing similar numbers of carbon atoms. Neohexane or 2,2-dimethylbutane (22DMB) is a major contaminant in cyclopentane.…”

Section: Introductionmentioning

confidence: 99%

“…It is also a high-quality blending component for clean gasoline with high octane number. , The composition of cyclopentane-neohexane from naphtha varies widely in volume from 92/8 to 29/71 . The discrimination of these two compounds is a great challenge because they not only exhibit extremely close boiling points of only 0.4 K difference but also form azeotropic components. , Considering the impossibility of splitting neohexane from cyclopentane by simple distillation operations, azeotropic and extractive distillations ,− have been designed to produce cyclopentane of higher purities. However, these heat-driven distillation-based hydrocarbon separations represent the most energy-intensive and operationally complex processes .…”

Section: Introductionmentioning

confidence: 99%

“…5 The discrimination of these two compounds is a great challenge because they not only exhibit extremely close boiling points of only 0.4 K difference but also form azeotropic components. 5,10 Considering the impossibility of splitting neohexane from cyclopentane by simple distillation operations, azeotropic 11 and extractive distillations 7,12−14 have been designed to produce cyclopentane of higher purities. However, these heat-driven distillation-based hydrocarbon separations represent the most energy-intensive and operationally complex processes.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Molecular Sieving of Cyclopentane/Neohexane Mixtures by the MFI Zeolite with Intersecting 10-Ring Channels

Zhou

et al. 2021

Ind. Eng. Chem. Res.

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The separation of close boiling and azeotropic mixtures of cyclopentane and neohexane is highly challenging in petrochemical industries. Current solutions including azeotropic and extractive distillations require high energy costs and complicated operations. The alternative separation method based on physical adsorption is energy-efficient; however, it has not yet been utilized for the splitting of these two compounds. Herein, we present the kinetic sieving of the abovementioned mixtures by a commercially available zeolite, silicalite-1, which offers intersecting 10-ring channels to promote the adsorption of cyclopentane but possesses steric constraints on the intracrystalline transport of neohexane. In both vapor and liquid phases, the material allows for highly selective separations of cyclopentane/neohexane mixtures under dynamic conditions, which is highly promising for industrial applications.

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“…below the boiling point of pure cycloheptane. A displacement of the boiling point of cycloparaffins in petroleum distillates is not unusual and may be attributed to the nonideality of dilute solutions of cycloparaffins in paraffins (5). RESULTS…”

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confidence: 97%