Key words: styrene, phenol, methylphenylcarbinol, acetophenone, ethylbenzene, propylene glycol, molybdenum, supercritical carbon dioxide, solubility, dynamic method, description of solubility, Peng — Robinson equation
Experimental results on solubility of the styrene, phenol, methylphenylcarbinol, acetophenone, ethylbenzene, propylene glycol and molybdenum as a complex with Trilon B in supercritical СO2 obtained using a dynamic (flow) method are presented. The obtained data are described in the framework of Peng — Robinson equation. The results of experiments on the extraction of organic components from the waste formed in the olefin epoxidation process at Nizhnekamskneftekhim Inc., on the analysis of extract composition, and on the testing of the extract as an epoxidation catalyst are presented.
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7.0.100-2018
Supercritical СО2 exreactions of waste components formed in propylene epoxidation process / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 3-12. - DOI:
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Ekstrakciya komponentov othoda processa epoksidirovaniya propilena sverhkriticheskim SO2 / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 3-12. - DOI:
En
Supercritical СО2 exreactions of waste components formed in propylene epoxidation process. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 3-12 (2012). https://doi.org/
Key words: subcritical water, extraction, phenolic compounds, flavonoids, antiradical activity, diphenilpicrylhydrazyl
A subcritical water extraction method for production of vegetable extracts possessing an antiradical activity is suggested. The major advantages of the method are (a) the possibility of extraction of up to 38 % of active substances of various chemical nature, including phenolic compounds, and (b) the absence of toxic organic solvents. The method is tested by producing extracts from Crataegus sanquinea Pall., Tilia cordata Mill., Helichrysum arenarium L., Matricaria recutita L. and Hypericum perforatum L. It is demonstrated that water- and ethanol-soluble fractions of obtained extracts have comparable antiradical activity measured in the reaction with diphenilpicrylhydrazyl radical.
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7.0.100-2018
Antiradical activity of the vegetable extracts, obtained in the medium of subcritical water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 13-20. - DOI:
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Antiradikal'naya aktivnost' rastitel'nyh ekstraktov, poluchennyh v srede subkriticheskoj vody / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 13-20. - DOI:
En
Antiradical activity of the vegetable extracts, obtained in the medium of subcritical water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 13-20 (2012). https://doi.org/
Key words: supercritical carbon dioxide, carboxylation, aromatic compounds, Lewis acids
A direct carboxylation of benzene and its derivatives PhX (X = Me, Br, Ph, OPh, OMe) and of mesitilene, durene and ferrocene in the presence of various Lewis acids (AlCl3, FeCl3, ZrCl4, ZnCl2) in supercritical CO2 medium is studied. In all the cases secondary transformations proceed faster compared to the primary reaction of carboxylic acid formation. For the system AlCl3/CO2/toluene studied in detail the optimal conditions of p-toluic acid formation are found. Quantum-chemical (DFT) calculations of carboxylation in AlCl3/CO2/benzene system using PRIRODA code allows one to trace a more energetically feasible reaction path.
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7.0.100-2018
Carboxylation of aromatic compounds in supercritical carbon dioxide medium / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 21-35. - DOI:
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Karboksilirovanie aromaticheskih soedinenij v srede sverhkriticheskogo dioksida ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 21-35. - DOI:
En
Carboxylation of aromatic compounds in supercritical carbon dioxide medium. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 21-35 (2012). https://doi.org/
Key words: oligomers of ethylene terephthalate, supercritical carbon dioxide, polyester fabric, dyeing, hydrophobization, superdispersed polytetrafluoroethylene
The effect of conditions of polyester fibrous material processing in supercritical carbon dioxide (SC-CO2) onto the localization of cyclic oligomers of ethylene terephthalate on the fiber surface is investigated. It is shown that the cyclic oligomers are deposited on the surface of polyester fibrous materials in the form of large associates. The mechanism of oligomer migration from the inner areas of polyester fiber plasticized in SC-CO2 is considered. Recommendations for the minimization of amount of oligomers localized on the surface of polyester fibrous materials during their dyeing in the SC-CO2 medium are suggested. It is shown that the deposition of oligomers on the surface of polyester fabrics does not negatively affect the quality of their hydrophobization by superdispersed polytetrafluoroethylene in SC-CO2 medium.
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7.0.100-2018
Oligomeric ethylene terephthalate in the process of polyester modification in supercritical carbon / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 36-46. - DOI:
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Oligomery etilentereftalata v processah modificirovaniya poliefirnyh tkanej v srede sverhkriticheskogo dioksida ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 36-46. - DOI:
En
Oligomeric ethylene terephthalate in the process of polyester modification in supercritical carbon. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 36-46 (2012). https://doi.org/
Key words: statistical physics, non-equilibrium theory, non-ideal systems, critical phenomena, local fluctuations, supercritical fluids
Exact analytical expressions for large-scale finite local fluctuations in hydrodynamic velocity and temperature of dense non-ideal fluid are obtained. Two simple models are proposed for probability distribution of density and temperature finite fluctuations. It is shown that the fluctuating fluid can be considered as two random fractions, one being more rarefied and the other being more dense than the averaged fluid. The distinctive features of these random fractions make them play different roles in physical and chemical behavior of the fluid. It is stated that large-scale finite local fluctuations are common for wide range of fluid states, not only for the neighborhood of gas— liquid critical point.
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7.0.100-2018
The development of finite fluctuations in local density, velocity and temperature for real fluids / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 47-63. - DOI:
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Razvitie lokal'nyh konechnyh fluktuacij plotnosti, kollektivnoj skorosti i temperatury v real'nyh flyuidah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 47-63. - DOI:
En
The development of finite fluctuations in local density, velocity and temperature for real fluids. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 47-63 (2012). https://doi.org/
Key words: supercritical water, hazardous organic substances, kinetics and mechanism of oxidation, tubular reactors, corrosion
The studies aimed at the environmentally benign destruction of hazardous organic substances (OS) and wastes via their oxidation in supercritical water (SCW) are reviewed. The advantage of SCW application is the capability of complete and rapid oxidation of OS in closed systems. The rate of oxidation is determined by temperature, OS to SCW and oxidant ratios, bond strengths in molecules of OS, their solubility in SCW and decreased in a sequence of aliphatic > aromatic, heterocyclic > polycyclic aromatic substances. The main products of oxidation are CO2, H2O and N2; sulfur, phosphorus and halogens are converted into corresponding mineral acids. Still, there are several difficulties in practical implementation of particular processes on industrial scale and related to the achievement of acceptable endurance, sustained and accident- free operation of SCW oxidation units. Heterogeneous processes on reactor walls result in negative phenomena, such as corrosion of constructional materials, precipitation and deposition of salts, and, as consequence, in the varied with time on stream kinetics of the main and conjugated reactions.
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7.0.100-2018
Destruction of hazardous organic substances in supercritical water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 1. – С. 64-88. - DOI:
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Utilizaciya toksichnyh organicheskih veshchestv v sverhkriticheskoj vode / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 1. – S. 64-88. - DOI:
En
Destruction of hazardous organic substances in supercritical water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 64-88 (2012). https://doi.org/
Key words: IR absorption, Raman scattering, hydrogen bonding, methanol
The sensitivity of IR and Raman spectra to the hydrogen bonding in methanol is quantitatively characterized using the factor of comparative sensitivity K, which can be expressed as a ratio of the values of intensities (Ib/Inb)IR/(Ib/Inb)RS for IR absorption and Raman scattering (b and nb indexes are attributed to H-bonded and non-bonded components, respectively). It was found that the value of K ≈20 for methanol is equal to the one calculated for n-butanol, although the change in the degree of hydrogen bonding in both cases was obtained using different approaches. It is shown that in some cases Raman spectra can be transformed into IR absorption spectra, and vise versa. It is important for the understanding of the difference in the shape of OH-valence vibration bands obtained using these two techniques.
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7.0.100-2018
Comparative sensitivity of the Raman and IR absorption spectra to hydrogen bonding in methanol / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 12-18. - DOI:
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Cravnenie chuvstvitel'nosti spektrov IK pogloshcheniya i kombinacionnogo rasseyaniya k vodorodnoj svyazi v metanole / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 12-18. - DOI:
En
Comparative sensitivity of the Raman and IR absorption spectra to hydrogen bonding in methanol. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 12-18 (2012). https://doi.org/
Key words: supercritical fluids, supercooled water, liquid water polyamorphism
Peculiar properties of fluid mixtures in the vicinity of the critical point of the pure solvent are commonly used in supercritical-fluid technologies, such as fluid extraction, enhanced oil recovery, supercritical chromatography, and micronization. These properties are linked to critical-point anomalies, in particular, very large compressibility and very low interfacial tension. Water, near its vapor-liquid critical point, as a supercritical solvent, is well studied, in contrast to supercooled water. However, more recently, many scientists have started to believe that deep in super-cooled region, not directly accessible to bulk-water experiments, there exists a critical point of liquid—liquid separation («liquid water polyamorphism»). If the water liquid — liquid critical point exists, the addition of a solute will generate critical lines emanating from the pure- water critical point. The phenomenon would be conceptually similar to what is known near the vapor-liquid critical point and what is commonly exploited in supercritical-fluid science and technology. This new idea has not yet been elaborated. The investigation of aqueous systems below the freezing temperature of pure water would not only shed light on the nature of plausible water polyamorphism, but also could open the way for utilizing cold water as a novel and unusual supercritical-fluid solvent.
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7.0.100-2018
Cold and supercooled water: a novel supercritical-fluid solvent / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 19-37. - DOI:
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Holodnaya i pereohlazhdennaya voda kak neobychnyj sverhkriticheskij flyuid / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 19-37. - DOI:
En
Cold and supercooled water: a novel supercritical-fluid solvent. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 19-37 (2012). https://doi.org/
Key words: spectral analysis, hydrogen bond, fluid systems
The application of a combined approach to the analysis of strongly coupled spectral bands is demonstrated. An OD-bond stretching vibration, v(OD), band shape in HDO molecule in the mixture [D2O] : [H2O] = 1 : 60 as a function of temperature under the conditions of isobaric heating is taken as an example. The following approaches are used for the analysis of spectral changes: (i) spectral band asymmetry and spectral band derivative analysis, (ii) difference spectroscopy, (iii) 2D-cross-correlation analysis, and (iv) Principal Component Analysis. The obtained results may be used as initial data in the procedure of spectral band fitting. This fact is important for tasks related to interpretation of poorly resolved or strongly overlapped spectral bands.
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7.0.100-2018
Application of combined approach to the analysis of IR-spectra of hydrogen-bonded fluids / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 38-54. - DOI:
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Primenenie kompleksnogo podhoda k analizu IK-spektrov vodorodno-svyazannyh flyuidov / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 38-54. - DOI:
En
Application of combined approach to the analysis of IR-spectra of hydrogen-bonded fluids. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 38-54 (2012). https://doi.org/
Key words: supercritical water, hydrogen bonds, clusters, percolation threshold
Numerical simulation techniques are used to study transformations of hydrogen-bonded water clusters at the transition to the supercritical state. It is demonstrated that the destruction of the infinite hydrogen-bonded cluster, i.e. passing the percolation threshold, is taking place in the subcritical region. At critical temperature structural fluctuations become so significant that the fluid behaves as a system with two types of ordering. The existence of tetrahedral clusters in supercritical water is confirmed at high pressure only.
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7.0.100-2018
Structure of supercritical water: concept of critical isotherm as percolation threshold / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 55-66. - DOI:
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Struktura sverhkriticheskoj vody: koncepciya kriticheskoj izotermy kak perkolyacionnogo poroga / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 55-66. - DOI:
En
Structure of supercritical water: concept of critical isotherm as percolation threshold. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 55-66 (2012). https://doi.org/
Key words: supercritical state, methanol, heptane, IR-spectroscopy, hydrogen bonds
The topology and energetic characteristics of H-bonded clusters in methanol and methanol—heptane mixtures in a wide range of state temperatures are studied by means of IR-spectroscopy. Average numbers of H-bonds per one molecule of methanol are calculated. Conclusion about the structural transformation occurring in the mixture under study is drawn based on the analysis of changes in spectral parameters of intermolecular —O...H bonds at rising temperature.
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7.0.100-2018
Structure of methanol short-range order along the 200 bar isobar line in the 60÷320 °C temperature range by means of IR-spectroscopy / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 67-74. - DOI:
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Struktura blizhnego poryadka metanola vdol' izobary 200 bar v temperaturnom diapazone 60÷320 °S po dannym IK-spektroskopii / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 67-74. - DOI:
En
Structure of methanol short-range order along the 200 bar isobar line in the 60÷320 °C temperature range by means of IR-spectroscopy. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 67-74 (2012). https://doi.org/
Key words: Raman spectroscopy, aqueous solutions, pressure, inclusions of fluids, negative pressure
The pressure dependence of the main spectral lines in Raman spectra of antracene and of 1 M water solutions of NaClO4 and Na2WO4 was measured by optic cell with sapphire windows at pressures up to 140 MPa. The obtained values of spectral shifts (from 0.6 to 1.1 cm-1 per 100 MPa) correspond to those described in literature for 1 M water solution of sodium sulfate.
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7.0.100-2018
Pressure dependence of Raman spectra for aqueous solutions and antracene / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 2. – С. 75-82. - DOI:
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Baricheskaya zavisimost' spektrov kombinacionnogo rasseyaniya vodnyh rastvorov i antracena / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 2. – S. 75-82. - DOI:
En
Pressure dependence of Raman spectra for aqueous solutions and antracene. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 75-82 (2012). https://doi.org/
Key words: carboranes, hydroformylation, supercritical carbon dioxide, rhodium, amidophosphites
A synthesis of novel carborane-containing phosphites is carried out. Their efficiency as ligands in rhodium-catalyzed hydroformylation of alkenes in supercritical carbon dioxide (SC-CO2) is tested. It is demonstrated that in the presence of newly synthesized carboranylamidophosphites a high alkene conversion at low catalyst loading can be achieved. An improved regioselectivity is obtained in SC-CO2 medium compared to toluene.
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7.0.100-2018
Hydroformylation of alkenes in supercritical carbon dioxide catalyzed by rhodium complexes with amidophosphite derivatives of carboranes / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 3. – С. 4-11. - DOI:
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Gidroformilirovanie alkenov v sverhkriticheskom diokside ugleroda, kataliziruemoe kompleksami Rh s amidofosfitnymi proizvodnymi karboranov / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 4-11. - DOI:
En
Hydroformylation of alkenes in supercritical carbon dioxide catalyzed by rhodium complexes with amidophosphite derivatives of carboranes. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 4-11 (2012). https://doi.org/
Key words: solid fossil fuels, selectivity of supercritical CO2-extraction, alkanes, naphthenes, lubricating oils
An experimental study of supercritical fluid extraction with carbon dioxide from carbonaceous rocks demonstrate the possibility of selective extraction of hydrocarbons, preferentially alkanes and naphthenes, independently of the facial-genetic type of initial material. The determined composition of supercritical extracts makes them suitable for the production of lubricating oils.
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7.0.100-2018
Extraction of hydrocarbons from carbonaceous rocks using supercritical carbon dioxide / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 3. – С. 12-19. - DOI:
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Ekstrakciya uglevodorodov iz uglerodsoderzhashchego syr'ya sverhkriticheskim dioksidom ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 12-19. - DOI:
En
Extraction of hydrocarbons from carbonaceous rocks using supercritical carbon dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 12-19 (2012). https://doi.org/
Key words: Juniperus oblonga, supercritical extraction, gas chromatography-mass spectrometry, component analysis
The extraction of Juniperus oblonga M. Bieb. fruits,growing in Dagestan (Russia) in a height of 1750 m above sea level, was obtained by means of supercritical CO2 extraction. The extraction was carried out at constant temperature 311 K and pressures 8, 10, 15, 20, 25, and 30 MPa. Using the gas chromatography/mass spectrometry analysis, 43 compounds in the extract obtained at 10 MPa are identified. Among them the major components are: α-pinene (7,11 %), sabinene (19,47 %), β-myrcene (11,97 %), limonene (2,64 %), β-elemene (2,31 %), germacrene-D (20,66 %), germacrene-D-4-ol (4,90 %), bisabolol (2,78 %), linoleic acid (5,28 %).
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7.0.100-2018
Composition of Juniperus Oblonga M. Bieb. fruits extract obtained by supercritical CO2 extraction / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 3. – С. 20-29. - DOI:
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Juniperus oblonga, supercritical extraction, gas chromatography-mass spectrometry, component analysis / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 20-29. - DOI:
En
Composition of Juniperus Oblonga M. Bieb. fruits extract obtained by supercritical CO2 extraction. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 20-29 (2012). https://doi.org/
Key words: critical point, saturation line, density, pressure
Combined models describing thermodynamic properties F related to the coexistence curve (including densities of liquid and gaseous phase, ρl and ρg, an order parameter, fs, a coexistence curve diameter, fd, a pressure of saturation, Ps, are discussed. They are presented in the form of equations F = f (τ, D, С) those follow the scaling theory of critical phenomena and include critical characteristics D = (α, β, Tc, ρc, Pc, ...) and fitting coefficients C. Models are based on a statistical treatment of experimental data and elaborated for a series of substances (CH4, NH3, SF6, water, methanol, ethanol, diethyl ether and fluorinated alkanes R134a, R143a, R236ea). The input data sets cover a wide temperature interval, that includes the critical point area. Some applied calculations are performed using the combined models; among them are values of the first and the second derivatives of the saturation pressure.
.
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7.0.100-2018
Scaling models of thermodynamic properties on the coexistence curve:
objectives and possibile solutions
/
–
Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика..
–
2012.
– Т. 7. – № 3.
– С.
30-55.
- DOI:
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Skejlingovye modeli dlya opisaniya termodinamicheskih svojstv na linii nasyshcheniya: problemy i nekotorye resheniya / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 30-55. - DOI:
En
Scaling models of thermodynamic properties on the coexistence curve:
objectives and possibile solutions.
Sverhkriticheskie Flyuidy: Teoriya i Praktika,
3,
30-55
(2012).
https://doi.org/
Key words: ammonium nitrate, organic ammonium nitrate, watered oil deposits, supercritical state, binary mixtures
Thermodynamic aspects of innovative binary mixture (BM) technology for increasing of productivity of oil-bearing beds that provides with a substantial cut of oil well watering (compared to the conventional steam heating) are discussed. The inorganic and organic ammonium nitrates (NH4NO3
and HOCH2CH2NH3+NO3-, respectively) are comparatively examined as heat producing components of BM that also contains sodium nitrite as an initiator of nitrate decomposition. Effects of temperature and pressure onto the product distribution and heat evolution in ethanolammonium nitrate decomposition are evaluated. Calculations of parameters in a near-well space taking into account the heat capacity of the surrounding rock layer demonstrate that temperature and pressure can exceed their critical values for both water and main oil fractions. As a result, the conditions for the intense upward flow of water-oil fluid in an artificial gas-lift regime arise.
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7.0.100-2018
Potential evaluation of thermochemical technology for increasing oil-bearing beds productivity and cut of oil deposit watering based on the reactions of binary mixtures / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 3. – С. 56-68. - DOI:
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Ocenka vozmozhnostej termohimicheskoj tekhnologii povysheniya nefteotdachi i minimizacii obvodneniya nedr na osnove reakcii binarnyh smesej / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 56-68. - DOI:
En
Potential evaluation of thermochemical technology for increasing oil-bearing beds productivity and cut of oil deposit watering based on the reactions of binary mixtures. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 56-68 (2012). https://doi.org/
Key words: supercritical fluid, catalytic oxidation, dimethyl ether, monoglim
For the first time the reaction of catalytic oxidative coupling of dimethyl ether (DME) in supercritical conditions is investigated. Oxidation of dimethyl ether by molecular oxygen in the presence of a СаO—SnO2 catalyst was carried out in the medium of excess reactant (DME) and in its mixtures with carbon dioxide in supercritical (SC) conditions (100 atm, 250—300 °C). At 255 °C a maximum conversion of DME (approaching 40 % at monoglim: diglim ratio about 2:1) is reached at 20-fold (by volume) dilution of DME with SC-CO2.
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7.0.100-2018
Catalytic oxidative coupling of dimethyl ether in supercritical conditions / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2012. – Т. 7. – № 3. – С. 69-73. - DOI:
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Kataliticheskaya okislitel'naya kondensaciya dimetilovogo efira v sverhkriticheskih usloviyah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2012. – Т. 7. – № 3. – S. 69-73. - DOI:
En
Catalytic oxidative coupling of dimethyl ether in supercritical conditions. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 69-73 (2012). https://doi.org/