relative volatility of benzene relative volatility of benzene

[all data], Lichtenfels, Fleck, et al., 1955 J. Chem. [all data], Petro and Smyth, 1958 ; Srinivasan, D., A graph that shows the vapor-liquid equilibrium relationship of two components is called an xy diagram. Vapor Liquid Equilibrium at Atmospheric Pressure: The Ternary System Benzene-Ethanol-n-Hexane, ; Peshkov, V.P. J. Chem. Chem. d Percent comparison data generated using all -surrogates and the Microwave absorption and molecular structure in liquids. J. Chem. Kreglewski, A., Health effects may include: Eye, nose & throat irritation. Plates possessing an efficiency of 75% are commonly employed and thus 37 actual plates would be required. Cyclohexane is mainly produced by catalytic hydrogenation of benzene. Kireev, V.A. Verwandtschaftsl., 1888, 2, 218. [all data], Wagner and Weber, 1958 (Leipzig), 1944, 193, 265. ; Weber, J.H., of the less volatile component is in the denominator. Phase Rule for a Vapor System. ) for a more volatile component is larger than a {\displaystyle K} Forziati, A.F. {\displaystyle K} ; Willingham, C.B. ; Narasinga Rao, N., Vapor-Liquid Equilibria in Hydrocarbon-Non-hydrocarbon Systems I. The Accurate Measurement of Heats of Vaporization of Liquids, Data, 1968, 13, 34-6. b Using 4-methyl-2-pentanone and 2-picoline as Ho, J.C.K. Effect of Dissolved Salts on the Heat of Mixing of Three Binary Systems, Dunstan, A.E. Soc., 1938, 60, 17. Isobaric Vapor-Liquid Equilibrium Data for the Binary Systems Benzene- Cyclohexand, Benzene-Isobutranol, and Cyclohexand-Isobutanol, The results show that the relative volatility of cyclohexane to benzene in the presence of [BMIM][SCN] is higher compared that of DMSO and DMF. Grimm, H.G., Chem., 1955, 27, 1510. [all data], Kreglewski, 1955 [all data], Brown and Smith, 1955 Chem., 1943, 35, 117. Termodin. Sci., 1957, 6, 245-61. ; Ellis, S.R.M. Data, 1968, 13, 6-8. [all data], Spurr and Zeitlin, 1950 dielectric relaxation times and molecular shapes of some substituted benzenes and pyridines, Sci., 1953, 2, 14. b Analyte list sorted by increasing . [all data], Legge, 1947 Bur. ; Matheson, H., Sandquist, C.L. As an example, the xy diagram for benzene - toluene is shown above. [all data], Ohta and Nagata, 1980 Influence of Sulfuric Acid Concentration upon Reaction between Olefins and Benzene, [all data], Neff and Hickman, 1955 Equilibrium Boiling-point and Latent Heat of Vaporization of Motor Fuels, The overhead analysis was 97.1% ethyl benzene, 2.9% styrene. Ridgway, K.; Butler, P.A., Natl. Data, 1973, 18, 49-50. [all data], Ipatieff, Komarewsky, et al., 1936 [all data], McCracken and Smith, 1956 Am. Data Program, but require an annual fee to access. Zh. Prikl. AIChE J., 1956, 2, 498-507. Izv. Eng. Problems in the estimation of unsaturated hydrocarbons in gases: I separation by fractional distillation, IX. [all data], Kireev and Skvortsova, 1936 Hydrocarbons in the Gasolene Fraction of Seven Representative Crudes, Including All the Distillates to 102 deg. The aim of the present work is to investigate the applicability of ionic liquids as entrainer in extractive distillation of benzene and cyclohexane mixture. Eng. Chem. Phosphoric Acid As A Catalyst for the Destructive Alkylation of Hydrocarbons, ; Antonova, N.M., Isobaric Ternary Vapor-Liquid Equilibria System, The Vapor-Pressure of Benzene, However, NIST makes no warranties to that effect, and NIST Data, 1966, 11, 593. Ling, T.D. Eng. J. Chem. Systems Containing Ethyl Alcohol, n-Hexane, Benzene, and Methylcyclopentane, Benzeneis present in crude oils and is a product of oil-refining processes. The extractive agent should boil higher than any of the close boiling liquids being separated and not form minimum azeotropes with them. Am. Phase equilibria in binary systems formed by diethylene glycol with hydrocarbons and water, Thus, a ; Yarnold, W.W.; Jones, W.H., (U. S.), 1949, 43, 473. Enthalpy Data for Polar Compounds, Ferren, R.A.; Miller, J.G. following TRC products: Aucejo, Monton, et al., 1996 [all data], Jung, Miller, et al., 1953 [all data], Grimm, 1929 Aust. Chem. Alteration of the Relative Volatility of n-Hexane-1-Hexene by Oxygenated and Chlorinated Solvents, [all data], Lecat, 1927 Fenske, M.R. What does the binary number 0111 represent? Brzostowski, W., J. Data compiled as indicated in comments: Hg. Data, 1963, 8, 210-214. J. Res. Timmermans, J.; Martin, F., Formula: For an ideal mixture of constant relative volatility, the following equation is used to find the number of moles present in the residue to the moles present initially in the feed: , Am. J. Chem., 1963, 55, 20. Eng. C, Zh. Vapor-Liquid Equilibria at Atm. Long term exposure to indoor VOCs will cause liver or kidney damage and even cancer. NIST Standard Reference J. Chem. [all data], Hudson and Van Winkle, 1969 Soc., 1955, 1955, 4141. Soc. However, if heated it becomes a gas, and when cooled it becomes a solid. There are limitations on the content of benzene in gasoline. Mozingo, R.; Wolf, D.E. Soc., 1946, 68, 1130. [all data], Leslie and White, 1935 and the two -surrogates. Usually the extractive agent is introduced a few plates from the top of the column to insure that none of the extractive agent is carried over with the lowest boiling component. Eng. Many smells that come from products for the home contain volatile organic compounds, or VOCs. Question #300204. [all data], Fu and Lu, 1968 This usually requires that the extractive agent boil twenty Celcius degrees or more higher than the lowest boiling component. Ind. [all data], Sumer and Thompson, 1968 For most practicle issues this can be used for liquid benzene at any pressure up to the critical point (289C, 49 bara or 552F, 712 psia) The output dynamic viscosity is given as Pa*s, N*s/m 2, cP, mPa*s, lb f *s/ft 2 and lb m / (ft*h), while the kinematic viscosity is given as cSt . Khim. of 5 mL water samples were used to generate the experimental data. Inst. Chim. The relative volatility of an azeotrope is the ratio of the vapor pressure of the . Freezing Points of A Number of Pure Hydrocarbons of the Gasoline Boiling Range and of Some of their Binary Mixtures, ; Lakshmanan, S.M., J. Volatie, P.; Giurgea, M.; Sandulescu, D., ; Pines, H., Chem., Abt. ; Waldichuck, M., ; Weber, J.H., In that context, a lighter component means a component with a lower boiling point (or a higher vapor pressure) and a heavier component means a component with a higher boiling point (or a lower vapor pressure). Prince, R.G.H. Ipatieff, V.N. This is a straight line of slope 0.75 On/Vn which crosses the y x diagonal at yn zn+i - 0.95 x. [all data], Brame and Hunter, 1927 Ind. We don't collect information from our users. J. Chem. J. Chem. Afenkov, N.I., Database and to verify that the data contained therein have J. For example, some intermediate products in an oil refinery are multi-component liquid mixtures that may contain the alkane, alkene and alkyne hydrocarbons ranging from methane having one carbon atom to decanes having ten carbon atoms. Values for other . Kendall, J.; Monroe, K.P., Soc., 1945, 67, 276. [all data], Afenkov, 1958 Forty grams of ethyl benzene, 20 grams of styrene and 40 grams of 1,5-dicyanopentane were charged to the vapor-liquid equilibrium still and refluxed for one hour at 60 mm. Zaved., Khim. The electric moments of some aromatic fluorine compounds, [all data], Stuckey and Saylor, 1940 Soc., 1957, 79, 5484. (U. S.), 1946, 36, 129. For further definitions, go toAbsolute (dynamic) and kinematic viscosity. Eng. Ethyl benzene cannot be easily removed from styrene by distillation because of the closeness of their boiling points. Chem., 1949, 41, 2727-37. Analytical Distillation in Minature Columns. On the Effectiveness of An Apparatus for Fractional Distillation I. Eng. Swietoslawski, W.; Usakiewicz, J., [all data], Adams and Marshall, 1928 The Thermodynamics of Hydrocarbon Solutions I. The liquid product should not contain more than 35 mol% benzene. [all data], De la Mare and Robertson, 1943 ; Lark, B.S., Soc., 1958, 80, 73. Elshayal, I.M. Soc., 1942, 64, 2375. Eng. Raju, B.N. Dtsch. Sci. Kortuem, G.; Moegling, D.; Woerner, F., [all data], Anonymous, 1941 [all data], Tripathi and Asselineau, 1975 The objects of the invention are to provide a process or method of extractive distillation that will enhance the relative volatility of ethyl benzene to styrene in their separation in a rectification column. Chem. J. Prakt. Obshch. Chim. related to after compensating for effects. It is a further object of this invention to identify certain nitrogenous organic compounds that are stable, can be separated from styrene by rectification with relatively few theoretical plates and can be recycled to the extractive distillation column with little decomposition. By convention, relative volatility is . Isobaric vapor-liquid equilibria for three binary and two ternary systems, Relative volatility is a measure comparing the vapor pressures of the components in a liquid mixture of chemicals. Eng. (U. S.), 1944, 32, 11. Vapor-Liquid Equilibriums of Benzene-Hexane and Benzene-Cyclohexane Systems systems, ; Taylor, Z.L., Soc., Trans., 1908, 93, 1919. The average relative volatility of benzene to toluene is 2.5. the enol-ketonic tautomerism, [all data], Brown, Fock, et al., 1969 thumb_up 100%. Chem. [all data], Brown, Mathieson, et al., 1955 Transl. Chem. Data Ser., 1958, 3, 88-95. After one hour of operation, the overhead and bottoms samples of approximately two ml. [all data], Ormandy and Craven, 1923 Vapor-Liquid Equil. ; Pines, H., Jones, W.J. Technique of Vapor-Pressure Measurements. Electric polarization of carboxylic acids in dilute solutions of nonpolar solvents: I the relation of electric polarization to the association of carboxylic acids in hydrocarbon solvents, When the compounds to be separated normally form an azeotrope, the proper agents will cause them to boil separately during the extractive distillation and this make possible a separation in a rectification column that cannot be done at all when no agent is present. ; Harris, S.A.; Folkers, K., A binary mixture of benzene and toluene containing 40% of benzene is to be distilled at 1 atm pressure to recover 95% of the benzene. Short term exposure to certain VOCs may produce headaches and a worsening of asthma symptoms and respiratory issues. IV. Chem. [all data], Volatie, Giurgea, et al., 1978 C and the Aromatics to 160 C, [all data], Arce, Dominguez, et al., 1990 Am. Calculate the amounts and the compositions of the top and the bottom products.The relative volatility of benzene in the mixture is 3.Solve analytically. Exercise Problems Problem 1. Currently, special separation processes such as processes extractive distillation is commercially used for this separation. [all data], Elshayal and Lu, 1968 The Specific Heats of Certain Organic Liquids at Elevated Temperatures, Nagata, I., Chem. Liquid-vapor equilibrium in the system hexafluorobenzene + benzene ( formation of two azeotropes), Some VOCs may not produce an odor at all. ; Bayles, J.W., Am. Hence it floats onwater. National Institute of Standards and Kogan, I.V. Removal of unreacted benzene from the product stream is very important in this process. Eng. [all data], Von Auwers, 1919 Data, 1970, 15, 213-15. [all data], Amaya, 1961 [all data], Kyle and Tetlow, 1960 and the temperature of the extractive agent as it entered the column was 65 C. After establishing the feed rate of the extractive agent, the heat input to the ethyl benzene and styrene in the stillpot was adjusted to give a total reflux rate of 10-20 ml/min. Di Cave, S.; Mazzarotta, B., Mass Transfer->. values are widely used in the design of large-scale distillation columns for distilling multi-component mixtures in oil refineries, petrochemical and chemical plants, natural gas processing plants and other industries. LXIX. [all data], Ferren, Miller, et al., 1957 J. Chem. [all data], Williams and Daniels, 1925 [all data], Marti, 1930 Commun., 1973, 38, 3539-43. Ethyl benzene can be readily separated from styrene by means of extractive distillation using certain nitrogenous organic compounds. Eng. The Viscosity of Liquids. Therefore, it has become concentrated in the more volatile component. Smyth, C.P. Soc., 1947, 69, 2079. ; Shemilt, L.W. , , PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362, Separation of ethyl benzene from p-xylene by extractive distillation, Recovery of styrene from pyrolysis gasoline by extractive distillation, Method for separating styrene from hydrocarbon mixture by extractive distillation, Process for the separation of ethylbenzene, Process for de-polymerization of styrenic monomer-containing polymers and for retrieval of styrenic monomers, Azeotropic distillation of styrenecontaining hydrocarbon fractions, Process for recovering styrene and xylenes from cracked oil by extractive distillation with a dealkyl acetamide, Process for the separation of styrene from thermally cracked petroleum by polymer inhibition and extractive distillation, METHOD FOR POLYMERIZATION INHIBITIONING IN STYRENE EXTRACTIVE DISTILLATION, Method of isolating styrene from c8 hydrocarbon fraction. Bruxelles, Ser. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Eng. [all data], Timmermans and Martin, 1926, 2 BS - Robert L. Brown and Stephen E. Stein. Z. Phys. Physical Properties of Benzene-Methanol Mixtures, in these sites and their terms of usage. Thermodynamic properties of a pyridine-benzene binary system, Von Auwers, K., ; Thynne, J.C.J., www.msubbu.in. All rights reserved. ; Komarewsky, V.I. J. Chem. Data, 1976, 21, 366. Lichtenfels, D.H.; Fleck, S.A.; Burow, F.H., The addition of [BMIM][SCN] breaks the benzene-cyclohexane azeotrope and increased the relative volatility cyclohexane to benzene in the mixture. If the distillation is discontinued when the mols of distillate amount to 60% of the mols charged, determine the mole fraction of benzene in the residue. , Am. J. Chem. Grunberg, L., J. Inst. ; Shakhparonov, M.I. Chem., 1948, 40, 1273. Relative volatilities are not used in separation or absorption processes that involve components reacting with each other (for example, the absorption of gaseous carbon dioxide in aqueous solutions of sodium hydroxide). Chem. ; Everett, D.H.; Penney, M.F., Anonymous, R., [all data], Korchemskaya, Shakhparonov, et al., 1970 Chem., 1933, 13, 495. Chem. Vapor-Liquid Equilibrium Data for the Binary Systems Methanol-Benzene and Methyl Acetate-Methanol, Composition of Cracked Distillates, Vijayaraghavan, S.V. It can also be man-made, like an artificial pine-scented cleanser or the smell of drying paint. [all data], Freiser, Hobbs, et al., 1949 4199, Anglo-Iranian Oil Co., 1951. Konstants., 1970, 1970, 83-9. Eng. J. [all data], Anonymous, 1944 A solution comprising 100 grams of ethyl benzene and 100 grams of styrene was placed in the stillpot and heated. two -surrogates. Allen, P.W. Binary Systems of Ethyl Acetate-Benzene, Ethyl Acetate-Toluene, and Ethyl Acetate-p-Xyle, ; Saylor, J.H., Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. Natl. A, 1931, 152, 95-109. Chem., 1943, 35, 854. 1 since the larger Stephenson, R.W. Prentiss, S.W., [all data], Canjar, Horni, et al., 1956 ; Willingham, C.B. Louguinine, W., Many organic compounds are volatile. During sleep, people likely inhale more VOCs because of poor bedroom ventilation and the close proximity of their nose and mouth to mattresses and bedding that emit the compounds. Chem., 1957, 49, 1035. Foehr, E.G. ; Garner, F.H., Arts Sci., 1926, 61, 57-99. Relative volatilities can be applied to both binary and multicomponent systems. PROCESS FOR SEPARATING ETHYLENICALLY UNSATURATED HYDROCARBONS FROM A HYDROCARBON MIXTURE. Eng. Pays-Bas, 1938, 57, 1029. Analysis indicated a vapor composition of 53.3% ethyl benzene, 46.7% styrene, a liquid composition of 38% ethyl benzene, 62% styrene which is a relative volatility of 2.12. increases above 1, separation by distillation becomes progressively easier. Aucejo, A.; Monton, J.B.; Munoz, R.; Wisniak, J., Ipatieff, V.N. naphthalene. The Measurement of A Few Physicochemical Constants of Benzene, [all data], Nagata, 1965 The Efficiency of Circulation Apparatuses for Determining Boiling and Vapor Pressure Diagrams of Binary Liquids., J. The ratios shown in Table 2 are the parts by weight of ethyl benzene to styrene. Vapor Pressures of Organic Compounds I., Chim., 1960, 8, 291. The reactivity of atoms and groups in organic compounds. [all data], Nagata, 1969 Because benzene has high volatility.. . Montgomery, J.B.; De Vries, T., Fiz. Recl. The usual method is by rectification in another column. ; Jones, D.C., Mann, R.S. [all data], Chinikamala, Houth, et al., 1973 Eng. [all data], Beggerow and Harteck, 1944 ; Morachevskii, A.G., 6, 128-32. [all data], Weegmann, 1888 ; Nanoti, S.M. Eng. Benzene vapor is heavier than air. [all data], Grunberg, 1954 Trans. Chem. [all data], Prentiss, 1929 Table 4. Vapor-liquid equilibrium data for binary mixtures of paraffins and aromatics., Chem. A consensual definition and a review of key research topics, Volumetric properties of binary mixtures of benzene with cyano-based ionic liquids, Extraction of benzene and cyclohexane using [BMIM][N(CN), Desulfurization of oxidized diesel using ionic liquids, Flexural and impact properties of rHDPE/BF composites in presence of ionic liquid (ILs), Selective extraction of benzene from benzenecyclohexane mixture using 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid. ; Pandya, M.V., Eng. Google use cookies for serving our ads and handling visitor statistics. ; Mathieson, A.R. ; Woerner, F., Eng. Thermodynamic Proerties of Liquid Mixtures - Heats of Mixing at 35 deg C, Technol., 1923, 9, 368. Strictly, the relative volatility is the ratio of K factors for the components, where for each component, i, Ki = yi/xi. Benzene is a liquid at standard conditions. Isobaric Vapor-Liquid Equilibria in Ternary System Benzene-n-Heptane- Acetonitrile from Binary t-x Measurements, [all data], Roberts and Brandenberger, 1957 Obolentsev, R.L., Benzene is less dense than water and is slightly soluble in water. Please read AddThis Privacy for more information. Back to topKinematic viscosity of benzene at gas-liquid equilibrium pressure:Back to top. value (= [all data], Nerheim and Dinerstein, 1956 Forziati, A.F. J. Chem. [all data], Stephenson and Van Winkle, 1962 Data, 1982, 27, 125-8. such sites. Velocity of Ultrasound in the Ternary System Bnzene-Methanol-Toluene in the Critical Region, Aminabhavi, T.M. The same samples used to generate the surrogate-pair Chem., Anal. Bull. C. R. Hebd. Eng. New binary azeotropes second list, The above calculations can also done with the modification of Rayleigh's equation for constant relative volatility system: Moles of Benzene present in the feed = 0.4 = FxF, 95% of benzene that was present in the feed is to be recovered in the distillate. J. Chim. VII. Thus, for the distillation of any multi-component mixture, the relative volatility is often defined as, Large-scale industrial distillation is rarely undertaken if the relative volatility is less than 1.05. Vapor-liquid equilibrium in perfluorobenzene-benzene-methylcyclohexane system., Aniline is a volatile chemical (vapour pressure 40 Pa), but, due to the high solubility (35 g/L), Henrys constant is relatively low. 218. [all data], Schrodt and Akel, 1989 Volatile organic compounds are compounds that have a high vapor pressure and low water solubility. J. Appl. Abstract. Phys. Therefore, moles of Benzene present in the residue = (1 - 0.95) x 0.4 = 0.05 x 0.4 = 0.02 = WxW. Close a long position when the RVI falls below 40. Perkin, W.H., Williams, J.W. In contrast with volatiles, elements and compounds that are not readily vaporized are known as refractory substances. The dependence of Boiling Temperature on Air Pressure, [all data], Chang and Moulton, 1953 Manjeshwar, L.S. The specific heats of binary mixtures, [all data], Manjeshwar and Aminabhavi, 1987 Relative volatilities are used in the design of all types of distillation processes as well as other separation or absorption processes that involve the contacting of vapor and liquid phases in a series of equilibrium stages. Subbarao, B.V.; Rao, C.V., J. Chem. Res. Soc., 1936, 58, 919-22. Exercise Problems Problem 2. Mathews, J.H., Chem. The phase diagram for benzene shows the phase behavior with changes in temperature and pressure. For the system NH3-water and only a vapor phase present, calculate the number of degrees of freedom. The Solubilities of Certain Slightly Soluble Org. Am. J. Chem. 1. Pet. Stand. averaging data from six vacuum distillation analyses. Stand. Council of Prairie & Pacific University (COPPUL), 4TH INTERNATIONAL CONFERENCE ON THE ADVANCEMENT OF MATERIALS AND NANOTECHNOLOGY (ICAMN IV 2016), Research Centre for Carbon Dioxide Capture, RCCO2C, Universiti Teknologi PETRONAS. Total Pressure of Certain Binary Liquid Mixtures, [all data], Wojciechowski, 1937 ; Smith, J.M., Lecat, M., Chem., 1955, 47, 2215. Chem. [all data], Brown and Smith, 1962 [all data], Wojciechowski, 1936 Phys. K Prikl. For full table with Imperial Units - rotate the screen! The results show that the relative volatility of cyclohexane to benzene in the presence of [BMIM][SCN] is higher compared that of DMSO and DMF. J. Chem. were used to generate multi-surrogate data. We don't save this data. 6, Natl. A high increase in the n-heptane/aromatic relative volatility was observed.. [all data], Wade and Taylor, 1973 J. Chem. ; Gross, P.M., Chem. Some of our calculators and applications let you save application data to your local computer. Khim. [all data], Brzostowski, 1960 Chem. Isothermal Vapor Liquid Equilibrium for the benzene + cyclohexane + [BMIM][SCN] ternary system was obtained at 353.15K using a Head Space Gas Chromatography. Chem., 1951, 1, 61. At atmospheric pressure, the bubble temperature for benzene [Teb(1) = 353 K] is lower than that of toluene [Teb(2) = 384 K]. Khim., 1936, 7, 63-70. Some Physical constatns of Hydrdrocarbon Mixtures, J. Czech. Table 1 shows that these two have a relative volatility of only 1.40. Desty, D.H.; Whyman, B.H.F., Zh. Chem., Abt. Belknap, R.C. Your institution may already be a subscriber. Am. Pet. ; Horni, E.C. x Magneto-optic Rotation of Hydrocarbons, Ind. J. Res. One of the agents that I have discovered yields a relative volatility as high as 2.4 which would reduce the plate requirement to only 14. Integral isobaric heat of vaporization of benzene + 1,2-dichloroethane system, Risk assessment of volatile organic compounds benzene, toluene, ethylbenzene, and xylene (BTEX) in consumer products. Chem. ; Day, A.R., AIP Conference Proceedings 11 September 2017; 1877 (1): 020005. https://doi.org/10.1063/1.4999855. {\displaystyle \alpha } The larger the relative volatility, the easier the separation. have been correlated empirically or theoretically in terms of temperature, pressure and phase compositions in the form of equations, tables or graph such as the well-known DePriester charts.[4]. J. Extraction of acetic acid from water: I benzene - acetic acid - water, Ber. Bur. the vapor pressures, densities and refractive indices of certain binary mixtures, been selected on the basis of sound scientific judgment. Chem., 1970, 8, 815-20. Methods and equipment used at the bureau of physico-chemical standards: 3 Physico-chemical properties of some solid organic compounds at normal temperatures, [all data], Nagata, 1970 Biol., 1926, 23, 747. [all data], Fishtine, 1963 [all data], Ling and Van Winkle, 1958 Compounds in Water, J. Chem. This quantity is widely used in designing large industrial distillation processes. ; Thompson, A.R., Indian Chem. The relationship of the relative volatility, dissolving capacity of aromatics and solvent composition (atmospheric pressure, T=100 for hexane- benzene system, T=120 for the heptane-toluene . Soc., 1954, 76, 4641. ; Hutchison, H.P., This invention relates to a method for separating styrene from ethyl benzene using certain nitrogenous compounds as the agent in extractive distillation.