means of water removal from these streams. Auto-ignition temperature PAGE TWO ETHYLENE GLYCOL Inhalation: ACGIH TLV IS 50 PPM FOR ETHYLENE GLYCOL VAPOUR. 6 a Ethylene glycol concentrations greater than 92% are not attainable with DOWTHERM 4000 fluid. Glycol-Water Mixtures Vapor Pressure-Boiling Point-Composition Relations H. M. Trimble and Walter Potts Cite this: Ind. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) The nonlinear increase in vapor pressure with increasing temperature is much steeper than the increase in pressure expected for an ideal gas over the corresponding temperature range. Facoltà di Scienze Ambientali, Seconda Università di Napoli, 1996 Dipartimento di Ingegneria Chimica, Università di Napoli “Federico II”. The product recovery and Use, Smithsonian (or is it just me...), Smithsonian Privacy ethylene glycol occur at acidic or neutral pH with a large excess of water. Pages 449-455, (compatible with EndNote, Reference Manager, ProCite, RefWorks). This Henry's Law constant indicates that ethylene glycol dibutyl ether is expected to volatilize from water surfaces(3). Vapor pressures of aqueous solutions of ethylene glycol are measured in the range of temperature from -10 to 60°C and concentration from 20 to 50wt%. Under these conditions, ethylene glycol yields of 90% can be achieved. Agreement NNX16AC86A, Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, Is ADS down? NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Propylene Glycol has for many years been the go-to glycol for use in food and beverage processing systems or where there is a requirement for a non-toxic classification. Vapor Pressure: Vapor pressure is formed in a thermodynamic equilibrium state in closed container at a persistent temperature. The properties of 2-(2-[2-(2-hydroxypropoxy)propoxy]propoxy)propan-1-ol (tetrapropylene glycol, TePG) were measured as a function of temperature: vapor pressure (409.85 to 582.15) K, density (298.15 to 443.15) K, viscosity (288.15 to 393.15) K, and surface tension (298.15 to 468.15) K. The obtained data for tetrapropylene glycol were regressed using correlations from simulation software. Diethylene glycol is a colorless, low-volatility, low-viscosity, hygroscopic liquid. Molecules that can hydrogen bond, such as ethylene glycol, have a much lower equilibrium vapor pressure than those that cannot, such as octane. Thesis An ethylene glycol production follows the reaction between ethylene oxide and water at temperature of 200 C and pressure of 20 bars to produce mono-ethylene glycol and other higher glycols derivatives. Abstract The solubility of water in methylene chloride and I: 2‐dichloro‐ethane over the temperature range ‐ 20 to 40 and 80 respectively has been determined. It is completely miscible with water and many organic liquid Eventually, the equilibrium conditions for the ternary mixture ethylene glycol-propylene glycol-water were experimentally determined, and it was shown that the UNIQUAC model is capable of estimating with very good accuracy the equilibrium conditions for such mixture. Investigation of Water Binding in Aqueous Solutions of Poly(ethylene glycol), Poly(propylene glycol) and Symmetric Triblock Copolymers of Poly(ethylene glycol) and Poly(propylene glycol) Andreas Stensgaard Stoltze M.Sc. Glycol, the principal agent in this process, has a chemical affinity for water. Eng. E.g. ( a chemical used to make antifreeze and polyester) . It is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. Ethylene glycol (\(\ce{HOCH_2CH_2OH}\)), the major ingredient in commercial automotive antifreeze, increases the boiling point of radiator fluid by lowering its vapor pressure. Vapor Pressure of Aqueous Propylene Glycol Solutions Source: Glycols. The major byproducts are the ethylene glycol oligomers diethylene glycol For additional information about DOWTHERM ethylene glycol-based fluids, call 1-800-447-4369 and request Form No. Afterwards, the equilibrium data were correlated by means of the UNIQUAC model, and the binary interaction parameters were evaluated. 180-1190, “Engineering and Operating Guide for D ethylene glycol ethers, which are frequently a component of brake fluids, detergents and solvents (paints and lacquers) and are used to treat natural and refinery gas; ethanolamines, which are used in textile finishing, cosmetics, soaps, detergents and natural gas Densities and vapour pressures of the propylene glycol‐water system were determined from respectively 20 to 45 C and 15 to 50 C at 5 C intervals. Solubility in water: miscible Vapour pressure, kPa at 20 C: 0.83 Relative vapour density (air = 1): 2.6 Relative density of the vapour/air-mixture at 20 C (air = 1): 1.01 Flash point: 39 C c.c. Vapor–liquid equilibrium for ethylene glycol/water P = 760 mmHg BP temp. Curme and Johnston, Reinhold Publishing Corp., New York (1952). The following correlation equation is obtained for practical calculations on heating towers and the like. In this way, consistent isobaric vapour–liquid equilibrium data at 101.3 kPa were measured for the ternary systems ethanol + water + ethylene glycol and ethanol + water … Vapor pressures of aqueous solutions of ethylene glycol are measured in the range of temperature from -10 to 60°C and concentration from 20 to 50wt%. IF HEATED OR Issue 3 Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound with the formula (CH2OH)2. Relative density (water = 1): 1.05 Solubility in water, g/l at 20 C: 1.1 (slightly soluble) Vapour pressure, Pa at 20 C: 478 Relative vapour density (air = 1): 6.8 Relative density of the vapour… Notice, Smithsonian Terms of Volume 29 Chem. Ethylene oxide is a flammable gas with a somewhat sweet odor. †† Degree Brix is a measure of the sugar concentration in a fluid and is … Propylene Glycol 50 57-55-6 Deionized Water 50 7732-18-5 4 – FIRST-AID MEASURES BREATHING (INHALATION): Remove from exposure area to fresh air immediately. Catalytic hydrocracking of sorbitol constitutes an interesting possibility of using excess production of cereals. In a low concentration range, the measured values of vapor pressure decrease according to the Raoult's law independent of temperature, while in a high concentration range, they show a trend to decrease towards the estimated values of freezing point with decreasing temperature. NO open flames. Vapor-Liquid Equilibria for Mixtures of Ethylene Glycol, Propylene Glycol, and Water between 98° and 122°C, © 1996 The Society of Chemical Engineers, Japan, Edited and published by : The Society of Chemical Engineers, Japan. The Henry's Law constant for ethylene glycol dibutyl ether is estimated as 1X10-5 atm-cu m/mole(SRC) derived from its vapor pressure, 0.09 mm Hg(1), and water solubility, 2000 mg/L(2). Vapor-Liquid Equilibria for Mixtures of Ethylene Glycol, Propylene Glycol, and Water between 98 and 122 C Amedeo Lancia , Dino Musmarra , Francesco Pepe Author information Astrophysical Observatory. † Typical properties, not to be construed as specifications. Mono Propylene Glycol, commonly referred to as Propylene Glycol but also referred to as Propane-1,2-diol, MPG, PG and Food Safe Glycol. ethylene glycol as an antifreeze is based on its ability to lower the freezing point when mixed with water. Vapour pressure Partition coefficient Water solubility Solubility in organic solvents / fat solubility Surface tension Flash point Auto flammability Flammability Explosiveness Oxidising properties Oxidation reduction potential about DOWFROST propylene glycol-based fluids only. Z. Ogumi, K. Miyazaki, in Encyclopedia of Electrochemical Power Sources, 2009Direct ethylene glycol fuel cells, in which the oxidation of ethylene glycol and the reduction of oxygen take place at the anode and the cathode, respectively, are promising candidates as electric power sources of portable devices such as the cellular phone and the laptop computer. Istituto di Ricerche sulla Combustione, C.N.R. Methyl ethylene glycol 1,2-Dihydroxypropane April 2014 CAS #: 57-55-6 EC Number: 200-338-0 ACUTE HAZARDS PREVENTION FIRE FIGHTING FIRE & EXPLOSION Combustible. The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative The vapor pressure of pure water at 25 degrees Celcius is 23.8 torr. AT ROOM TEMPERATURE, VAPOURS ARE MINIMAL DUE TO LOW VAPOUR PRESSURE. b Freezing points are below -60˚F (-51˚C). Auto-ignition temperature: 285 C The liquid glycol will absorbs the water content in the natural gas. It is an odorless, colorless, sweet-tasting, viscous liquid. Such reaction leads to an aqueous solution of ethylene and propylene glycol, butanediols, glycerol, alcohols, which is then to be distilled with the aim of separating the different species present.Since few equilibrium data have been published for this kind of mixtures, the first part of the present work was aimed at producing isothermal vapor-liquid equilibrium data in the range of 98°–122°C for the three binary solutions which can be obtained from water, ethylene glycol and propylene glycol. It dissolves easily in water.Ethylene oxide is a man- made chemical that is used primarily to make ethylene glycol ( a chemical used to make antifreeze and polyester) . The physical properties of ethylene glycol-water mixtures are therefore extremely important. Solubility in water: miscible Vapour pressure, Pa at 20 C: 6.5 Relative vapour density (air = 1): 2.1 Relative density of the vapour/air-mixture at 20 C (air = 1): 1.00 Flash point: 111.11 C c.c., 115 C o.c. Under normal conditions, diethylene glycol has no detectable odor; however, under high vapor concentrations, a slightly sweet odor may be detected.

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