Supercritical fluid propane–butane extraction treatment of oil-bearing sands

Хайрутдинов, В. Ф.; Akhmetzyanov, Talgat R.; Гумеров, Ф. М.; Khabriev, Ilnar Sh.; Фарахов, М. И.

doi:10.1134/s0040579517030083

Cited by 23 publications

(18 citation statements)

References 13 publications

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“…This method and new design of the VLE cell has been also successfully used to measure phase equilibrium properties of a complex multicomponent system such as supercritical solvent (propane + n -butane) + oil sludge, oil-bearing sands, and oil emulsions, etc. (see our previous publications refs , , and − ).…”

Section: Resultsmentioning

confidence: 83%

“…For example, the use of supercritical extraction processes involving SC CO 2 (heavy oil recovery by SC CO 2 injection, − SC CO 2 food processing industry − ) or SC CO 2 sequestration processes, − etc. In recent years, separations with supercritical fluids (for example, carbon dioxide) as a solvent have reached widespread attention in various industrial applications such as food and oil processing, biotechnology, and environmental control. − The number of applications using supercritical fluids is increasing constantly, due to their unique properties and commercial significance. − In a number of our previous publications − we have studied aspects related to extractions of heavy hydrocarbons from dry oil sludge, oil emulsions, and oil-bearing sand by a supercritical binary mixture of propane + n -butane. However, due to the lack of extensive, reliable, and precise VLE data for the efficient design of separation units or the development of new accurate methods for correlating and predicting high-pressure phase equilibria, their widespread commercial implementation is still limited.…”

Section: Introductionmentioning

confidence: 99%

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New Design of the High-Pressure Optical Cell for Vapor–Liquid Equilibrium Measurements. Supercritical Binary Mixture (Propane/n-Butane) + Acetophenone

et al. 2020

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A new design of the high-pressure and high-temperature optical cell has been developed for precise measurements of the vapor–liquid equilibrium (VLE) properties of multicomponent mixtures at pressures up to 50 MPa and at temperatures from room to 450.15 K. The present design of the VLE optical cell allows avoidance of the separation of the binary system out of the sampler (in the sampling tube) and accurate determination of the concentrations of the coexisting phases without disturbing the phase equilibrium conditions during the high-pressure sampling procedure (thermodynamically consistent PTxy data). A sufficiently large volume (117 cm3) of the measuring cell allows extraction of a relatively large sample volume (about 4.1 cm3) from the liquid and the vapor phase independently without breaking the phase equilibrium (PT) conditions during the sampling procedure from each phase. This allows a considerable increase of the accuracy of the concentration determination of the equilibrium phases using the gravimetric method, especially the vapor phase. The gravimetric sampling method provides a precise analysis of the coexisting phase concentrations without using expensive chromatographic columns, which are not always suitable for the analysis of various complex multicomponent mixtures. The accuracy, reliability, and correct operation of the new design of the high-pressure VLE cell was verified by measuring the phase equilibrium properties of pure (propane) and the binary (propane + n-butane) mixture with well-known VLE properties. Also, the method was applied for the new, previously unexplored, ternary mixture of supercritical solvent (0.527 propane + 0.473 n-butane) + acetophenone. The values of the critical parameters for the ternary mixture have been estimated from the experimental VLE data near the critical point. The combined expanded uncertainty of the temperature, pressure, and concentration measurements at 0.95 confidence level with a coverage factor of k = 2 is estimated to be 0.15 K, 0.0022, and 0.03, respectively.

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Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

New Design of the High-Pressure Optical Cell for Vapor–Liquid Equilibrium Measurements. Supercritical Binary Mixture (Propane/n-Butane) + Acetophenone

et al. 2020

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“…In this context, the question arises of whether or not the composition of the propane/butane mixture changes after a unit cycle of the continuous (multicycle) extraction process. The previous investigation of the SCF extraction with the same extractant for oil recovery from oil-bearing sands [10] by analyzing the composition of the propane/butane mixture before and after the extract recovery and extractant regeneration determined that the propane content decreased to ~6 wt %, the butane content increased to ~9 wt %, and the contents of such (minor) components as methane, ethane/ethylene, and isobutane did not significantly change. Note, however, that the effect of the possible change in the composition of the extractant is extremely important on the industrial process but is much less significant on the results of this study and the quality of analysis.…”

Section: Supercritical Fluid Extraction Tablementioning

confidence: 99%

“…To study, refine, and expand the classical notions of solubility, a significant research space has been formed [7]. Among the notions to consider are the limits of applicability of the conventional notions of solubility under SCF conditions for some types of phase equilibria in solute-solvent systems, the crossover behavior of the solubility isotherms of solutes in SCF solvents [7], the comparative efficiency of extraction processes with the liquid-phase and supercritical fluid states of extractants for various types of phase equilibria in solute-solvent systems [3], the development of new methods to describe and generalize experimental data on solubility with the search of predictive capabilities within the subject under discussion [7,8], and the investigation of the efficiency of using SCF solvents of another physicochemical nature (other than widely used CO 2 and H 2 O) [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

An Additional Condition of Efficiency of the Supercritical Fluid Extraction Process

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Хайрутдинов

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2021

Theor Found Chem Eng

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The extraction of valuable components (methyl phenyl carbinol, acetophenone, ethylbenzene, phenol, propylene glycol) from industrial wastewater formed during styrene-propylene oxide coproduction by the hydroperoxide method at PAO Nizhnekamskneftekhim was used as an example to formulate and discuss approaches to increasing the efficiency of the extraction process performed under supercritical fluid conditions beyond the binodal for the systems desired component-extractant with type I and II phase behavior. The assumptions were experimentally confirmed by studying the extraction of methyl phenyl carbinol and phenol from their aqueous solutions with such extractants as carbon dioxide in the liquid and supercritical fluid state and also a supercritical propane/butane mixture. The phase equilibrium of the thermodynamic system propane/butane-propylene glycol was experimentally investigated at 403, 423, and 443 K.

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“…As is well-known, n -alkanes, in particular propane, n -butane, and their binary mixtures propane/ n -butane (see, for example, refs − , − ) in the supercritical conditions, are the promising solvents for the chemical industry. One of the important advantages of these solvents (propane, n -butane, and their mixtures) is the relatively low values of critical parameters, especially the critical pressure.…”

Section: Introductionmentioning

confidence: 99%

Measurements of Isothermal Vapor–Liquid Equilibrium and Critical Point-Based Perturbed-Chain Statistical Association Fluid Theory Phase Behavior Modeling of the Propane + Phenol and Tetracosane + Propane/n-Butane Mixtures

et al. 2022

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The isothermal vapor−liquid equilibrium (VLE, pressure, temperature, and composition of coexisting vapor and liquid phases, PTxy) was directly determined using a high-pressure optical cell for binary propane + phenol and ternary tetracosane + propane/n-butane systems. Measurements were carried out at three selected isotherms of 383.15, 403.15, and 423.15 K at pressures from 0.94 to 14.5 MPa for propane + phenol and 403.15, 423.15, and 443.15 K at pressures up to 7.5 MPa for tetracosane + propane/n-butane systems. The critical property data (T C and P C ) for both mixtures have been derived from the measured VLE data. Based on the initial slopes of the critical lines (shape of the critical lines), the qualitative behavior (pure-and mixture-like behavior) of the isochoric heat capacity (C Vx , weak singular property), isobaric heat capacity (C Px ), and isothermal compressibility (K Tx , strong singular property) of the propane + phenol binary mixture near the critical point has been studied. It is demonstrated that the simplest version of critical point-based perturbed-chain statistical association fluid theory neglecting the complex molecular background of phenol yields reasonably accurate predictions of its pure compound properties. With the value of k 12 obtained by fitting the present data of propane + phenol, this model yields reliable predictions for VLE in the systems of other n-alkanes, benzene, carbon monoxide, and nitrogen.

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Supercritical fluid propane–butane extraction treatment of oil-bearing sands

Cited by 23 publications

References 13 publications

New Design of the High-Pressure Optical Cell for Vapor–Liquid Equilibrium Measurements. Supercritical Binary Mixture (Propane/n-Butane) + Acetophenone

New Design of the High-Pressure Optical Cell for Vapor–Liquid Equilibrium Measurements. Supercritical Binary Mixture (Propane/n-Butane) + Acetophenone

An Additional Condition of Efficiency of the Supercritical Fluid Extraction Process

Measurements of Isothermal Vapor–Liquid Equilibrium and Critical Point-Based Perturbed-Chain Statistical Association Fluid Theory Phase Behavior Modeling of the Propane + Phenol and Tetracosane + Propane/n-Butane Mixtures

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