Phase equilibrium in the system water–acetonitrile–cyclohexene–cyclohexanone

Balbenov, S. A.; Фролкова, А. К.; Akishina, A. A.

doi:10.1007/s11172-015-1160-7

Cited by 13 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(CHON of obtained quality can be used for the production of caprolactam) was proved using mathematical modeling in Aspen Plus. The advantages of NMP using are: a simple structure of the phase diagram (compared to a system that uses only AN , ), a high boiling point (compared to AN , ), thermal stability (compared to dimethylsulfoxide), a high value of relative volatility in the mixture with CHON (compared to dimethylsulfoxide), no limitations in the composition of the initial mixture for the flowsheet proposed. The reaction mixture with binary solvent NMP + AN can also be separated using this method, but there are limitations on the composition of the initial mixture, in particular, the reaction should be carried out in excess of AN with respect to NMP (3/1 and above) to get CHON of commercial quality.…”

Section: Discussionmentioning

confidence: 99%

“…Acetonitrile (AN) was used as solvent for reaction. However, the presence of AN complicates the separation flowsheet because of a number of azeotropes (three binary and one ternary) and region of three liquid phases (the distribution of catalyst between the liquid layers). − CHON having the highest boiling temperature (428.55 K) is always presented as a bottom product that negatively affects its purity. An attempt to replace AN with other solvents: dimethylsulfoxide, dimethylformamide, or dimethylacetamide were made .…”

Section: Introductionmentioning

confidence: 99%

“…The method of studying is mathematical modeling using Aspen Plus V.10.0. The parameters of the nonrandom two-liquid (NRTL) model were taken from literature. , The missing parameters were regressed on the basis of available experimental data and are presented in the paper.…”

Section: Introductionmentioning

confidence: 99%

“…Boiling Temperatures of Pure Components and Azeotropic Data (Experimental[11][12][13]21,22 and Calculated) for Systems CHEN + CNON + W + NMP (+AN) at 101.325 kPa…”

mentioning

confidence: 99%

See 3 more Smart Citations

Phase Equilibrium of Systems Cyclohexene + Water + Cyclohexanone + N-Methyl-2-pyrrolidone (+Acetonitrile)

2019

View full text Add to dashboard Cite

The paper presents the results of the study of phase equilibrium in the system formed in the reaction of cyclohexene oxidation (cyclohexene + water + cyclohexanone + solvent). Pure N-methyl-2-pyrrolidone or binary mixture acetonitrile + Nmethyl-2-pyrrolidone was considered as a solvent. The method of studying was mathematical modeling on the base of the nonrandom two-liquid model. Thermodynamic-topological analysis was used to analyze the structure of the vapor−liquid equilibrium diagram. The mixture separation flowsheets were proposed and parameters of column work were determined using simulation in Aspen Plus V.10.0. The possibility of isolation of the target component (cyclohexanone) without the use of special separation methods was proved. The results obtained showed the prospects of replacement of pure acetonitrile or previously proposed dimethylsulfoxide and dimethylacetamide by solvents considered.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Boiling Temperatures of Pure Components and Azeotropic Data (Experimental[11][12][13]21,22 and Calculated) for Systems CHEN + CNON + W + NMP (+AN) at 101.325 kPa…”

mentioning

confidence: 99%

See 2 more Smart Citations

Phase Equilibrium of Systems Cyclohexene + Water + Cyclohexanone + N-Methyl-2-pyrrolidone (+Acetonitrile)

2019

View full text Add to dashboard Cite

show abstract

“…The three-phase splitting phenomenon is widely used in different technological processes: extraction (microextraction) and other separation processes in technology of basic organic and petrochemical synthesis and biotechnological processes. − The possibility of the separation of multicomponent splitting systems depends on the size and features of liquid–liquid (LLE) and liquid–liquid–liquid (LLLE) phase region. All of these facts indicate the necessity of investigation of such systems.…”

Section: Introductionmentioning

confidence: 99%

The Method of Study of Liquid–Liquid–Liquid Equilibrium in Quaternary Systems

Фролкова¹,

Akishina²,

Фролкова³

et al. 2017

J. Chem. Eng. Data

View full text Add to dashboard Cite

A method of studying of the liquid−liquid−liquid equilibrium (LLLE) region in quaternary systems was proposed. It includes four basic stages: the study of the tetrahedron scan; the determination of a composition of coexisting liquid phases in ternary constituents; the choice of conjugate composition and analysis of compositions of three liquid phases at adding conjugate composition; the prediction of the type of LLLE splitting area in a composition tetrahedron. Different ways of conjugate composition adding were proposed for different types of the splitting diagram. Five quaternary systems with different types of three liquid phase region were studied using mathematical modeling and nonrandom two-liquid model. The structure of the three-phase immiscibility region was predicted for all systems. It was found that the prediction results and experimental and calculated data are in a good agreement.

show abstract