Extractive rectification by means of sulfolane in chemical technology: A review

Zaretskii, M. I.; Rusak, V. V.; Chartov, E. M.

doi:10.3103/s1068364x11080072

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…Formally, sulfolane is a cyclic sulfone, containing a four-membered carbon ring and sulfonyl functional group (R2SO2) with a sulfur atom double-bonded to two oxygen atoms with a quite large dipole moment (μ=4.7 debye), dielectric constant (ευ=43.4) and low vapor pressure [12,13]. The structure of sulfolane with its zwitterionic and dritterionic resonance structures is illustrated in [14,15]. Sulfolane is the preferred solvent for these processes due to its satisfactory selectivity for the aromatics of interest, low boiling temperature and its capacity for dissolving large quantities of aromatics in relatively low quantities of solvent -the sulfolane extraction process is less expensive to operate than similar processes using other solvents.…”

Section: Beware Of Sulfolanementioning

confidence: 99%

“…In fact, pure sulfolane under standard operating conditions is considered to be a stable compound and non-aggressive to steel, but sulfolane systems, if contaminated by traces of oxygen and at typical process conditions (170-180ºC), may lead to sulfolane decomposition and formation of Due to its combination of physical and chemical properties (inertness and stability), sulfolane is a selective solvent in liquid-liquid and liquid-vapour extraction processed, used for the removal of close-boiling alkanes from cycloalkanes (C 5 -C 10 derived from petroleum fractions) or for the separation of compounds with different degree of saturation and polarity in the extractive rectification of arenes (BTX-benzene, toluene, xylene) from non-aromatic saturated hydrocarbon mixtures) [14,15]. Sulfolane is the preferred solvent for these processes due to its satisfactory selectivity for the aromatics of interest, low boiling temperature and its capacity for dissolving large quantities of aromatics in relatively low quantities of solvent-the sulfolane extraction process is less expensive to operate than similar processes using other solvents.…”

Section: Beware Of Sulfolanementioning

confidence: 99%

“…More detailed analysis revealed, that many papers referred to solubilizers (320), ionic liquids (168), viscosity (140), solubility (106), organic solvents (100), solvent extraction (91), oxidation reaction (72), catalysts (72), separation methods (70), chemical stability (52), aprotic solvents (37), polar solvents (35), chemical engineering (35), solvent mixtures (28), toxicity (19), biodegradation (19), petroleum (18), liquid-liquid equilibrium (18), corrosion (9), etc. Furthermore, 189 patents and patent applications that relate to the synthesis of sulfolane, its purification and use as a solvent or extractor, are mostly owned by Philips Petroleum Company (24), Lloyd (15), Berg (15) and Mobil Oil Corporation (10), respectively. A natural question appears, what actually triggers an increasing interests in sulfolane that fades after some years?…”

Section: Synthesis and Manufacturingmentioning

confidence: 99%

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Sulfolane: Magic Extractor or Bad Actor? Pilot-Scale Study on Solvent Corrosion Potential

et al. 2018

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The sulfur-containing derivatives and their metabolites, regarded as ‘old devils of green’ chemistry, constitute a relevant class of air/water/soil contaminants in over-polluted world. In fact, some industrially-engineered solvents have become environmentally unfavorable. An attractive alternative to commonly used industrial liquids is sulfolane (C4H8SO2), an anthropogenic medium. The main objective of this paper is the comprehensive review focusing mainly on the state-of-the-art aspects of the sulfolane synthesis, application of sulfolane as an extractive solvent due to its ‘unique’ physicochemical properties as well as the potential of sulfolane to cause equipment corrosion and subsequent spills. The potential risk for groundwater contamination, danger for human health and ways of sulfolane biodegradation were briefly reviewed as well. Interestingly, the analysis performed on data stored in the Reaxys database revealed an alternating tendency of waxing and waning interest in sulfolane during the space of the last fifty years. Moreover, the primary goal of the presented case study was to verify applicability of industrial, multi-electrochemical technique for reliable detection of corrosion in low conductive process fluids. Several aspects of corrosion measurement including the impact of process parameters (temperature) and impurities (oxygen and chlorides) on stainless steel corrosion in pure sulfolane were investigated briefly.

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Section: Beware Of Sulfolanementioning

confidence: 99%

Section: Beware Of Sulfolanementioning

confidence: 99%

Section: Synthesis and Manufacturingmentioning

confidence: 99%

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Sulfolane: Magic Extractor or Bad Actor? Pilot-Scale Study on Solvent Corrosion Potential

et al. 2018

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“…Regarding the operational costs and limitations of SFL-containing soil/water chemical and/or biological remediation, a key question should be raised about the reasons for unintentional sulfolane leakages into the ecosystem as the extractive liquid is industrially used and regenerated in the closed loop [21]. Moreover, under standard operating conditions, pure SFL is regarded to be non-aggressive to steel, however, small quantities of oxidizing agents (e.g., chlorates, nitrates, peroxides), oxygen or water can induce corrosion processes with the formation of aggressive (by)-products, for instance, SO 2 that is subsequently oxidized to H 2 SO 3 [22].…”

Section: Introductionmentioning

confidence: 99%

Water-Induced Corrosion Damage of Carbon Steel in Sulfolane

et al. 2020

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Sulfolane in contact with water and oxygen forms acidic (by-) products that are major factors in accelerating the corrosion of carbon/stainless steel. In consequence, water-induced corrosion damage can be a serious problem in industrial systems. Hence, the determination of the corrosion resistance of AISI 1010 steel immersed in sulfolane containing 0 to 6 vol.% water was the principal objective of the study. Evaluation of the corrosion resistance of steel electrodes was performed using a potentiodynamic technique and scanning Kelvin probe microscopy. It was observed that the corrosion products layer that formed on the surface of AISI 1010 steel partially protects it against corrosion in sulfolane with a water concentration in the range from 1 vol.% to 4 vol.%. Interestingly, amounts of water above 4 vol.% cause a break-down of the corrosion products layer and deteriorate the corrosion resistance of AISI 1010 steel as well. Moreover, the relationship between the fractal dimension, corrosion degree of the steel surface and water concentration in sulfolane was investigated. The fractal dimension was determined using 2D grayscale images of AISI 1010 steel registered through a scanning electron microscope. It was noticed that both the fractal dimension and the corrosion degree rose with the increased water concentration in sulfolane.

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“…Due to its satisfactory selectivity, low boiling temperature, and its capacity for dissolving large quantities of aromatics, sulfolane is the preferred solvent for liquid-liquid and liquid-vapor extraction processes when separating compounds with various degrees of saturation and polarity in the extractive rectification of BTX (benzene, toluene, xylene) mixture from the non-aromatic saturated hydrocarbons [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Corrosion Monitoring of AISI 1010 Carbon Steel with Metal Surface Mapping in Sulfolane

et al. 2019

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Solvents are widely used in organic synthesis. Sulfolane is a five-membered heterocyclic organosulfur sulfone (R-SO2-R’, where R/R’ is alkyl, alkenyl, or aryl) and an anthropogenic medium commonly used as industrial extractive solvent in the liquid-liquid and liquid-vapor extraction processes. Under standard conditions sulfolane is not aggressive towards steel, but at higher temperatures and in oxygen, water, or chlorides presence, it can be decomposed into some corrosive (by-)products with generation of SO2 and subsequent formation of corrosive H2SO3. This pilot-case study provides data from laboratory measurements performed in low conductivity sulfolane-based fluids using an industrial multi-electrochemical technique for reliable detection of corrosion processes. In particular, a comprehensive evaluation of the aqueous phase impact on general and localized corrosion of AISI 1010 carbon steel in sulfolane is presented. Assessment of corrosive damage was carried out using an open circuit potential method, potentiodynamic polarization curves, SEM/EDS and scanning Kelvin probe technique. It was found that an increase in the water content (1–3 vol.%) in sulfolane causes a decrease in the corrosion resistance of AISI 1010 carbon steel on both uniform and pitting corrosion due to higher conductance of the sulfolane-based fluids.

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Extractive rectification by means of sulfolane in chemical technology: A review

Cited by 5 publications

References 4 publications

Sulfolane: Magic Extractor or Bad Actor? Pilot-Scale Study on Solvent Corrosion Potential

Sulfolane: Magic Extractor or Bad Actor? Pilot-Scale Study on Solvent Corrosion Potential

Water-Induced Corrosion Damage of Carbon Steel in Sulfolane

Real-Time Corrosion Monitoring of AISI 1010 Carbon Steel with Metal Surface Mapping in Sulfolane

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