The hydroxyl groups on glycols undergo the usual alcohol chemistry, giving a wide variety of possible derivatives. Ethylene glycol eg is an important organic compound and chemical intermediate used in a large number of industrial processes e. Ethylene glycol helps keep your cars engine from freezing in the winter and acts as a coolant to reduce overheating in the summer. This chemistry permits ethylene glycol to act as an intermediate in a wide range of. Removal or dilution of pools of glycolwater solution is imperative, since the solution can feed a firesite. Experimental investigation of al2o3 water ethylene glycol. Physical properties the chemical formula for ethylene glycol is c 2 h 6 o 2, and its molecular weight is 62. Ethylene glycol is a chemical commonly used in many commercial and industrial applications including antifreeze and coolant.
Pgbased antifreeze % of total egbased antifreeze % of total water 3. The first step in the production of ethylene is to take the feedstock and crack it into ethylene and other various products in a furnace. Jun 23, 2016 add a known quantity of ethylene glycol in 5 l water solution to the filter. Ethylene glycol is similar in structure to glycerol. Effects of ethylene glycol eg on rheological and thermal properties of polyvinyl alcohol pva gels were studied by longitudinal vibration measurements and differential scanning calorimetry. All the properties have negative values and exhibit a minimum at the same waterrich. Ethylene glycol definition of ethylene glycol by the free. Triethylene glycol is a poly ethylene glycol that is octane1,8diol in which the carbon atoms at positions 3 and 6 have been replaced by oxygen atoms. Indeed, owing to its unique properties and versatile commercial applications, a variety of chemical systems e. Ethylene glycolbased fluids are less viscous than propylene glycolbased fluids.
Downloaded by tianjin university on 23 november 2012. Abstract the effect of the molecular weight of polyethylene glycol peg on the physical properties of waterbased magnetic fluids with sodium. Ethylene glycol is the major component of antifreeze preparations. Experimental results, excess and partial molar volumes. Synthesis, properties and biodegradation of periodic copolyesters composed of hydroxy acids, ethylene glycol, and terephthalic acid.
The properties of ethanol, ethylene glycol and ethyl acetate are from wikipedia. Applications properties characteristics applicationsuses. Ethylene glycol is acutely toxic to humans, whereas propylene glycol is a safe additive for foods and medications. Ethylene glycol, or 1,2ethanediol, is used as an antifreeze in cooling and heating systems, an industrial humectant. Ethylene glycol is a liquid inhalation ethylene glycol is a colorless liquid. A colorless sweettasting viscous diol, c2h6o2, used as an antifreeze in cooling and heating systems.
For this reason, ethylene glycol is commonly used in the manufacture of antifreezes. All atsdr toxicological profile pdf files are electronic conversions from paper copy or other electronic ascii text files. Ethylene glycol is odorless, but has a sweet taste. Ethylene glycol is also used in hydraulic brake fluids and inks used in stamp pads. Ethylene glycol can be recovered from the natural gas and reused as an inhibitor after purification treatment that removes water and inorganic salts. In 1963 modo started a production of ethylene oxide based on direct oxidation from ethylene in stenungsund, sweden. Ethylene glycol meglobal between the dow chemical company and petrochemical. Physical properties units propylene glycol dipropylene glycol tripropylene glycol chemical name 1,2propanediol oxybispropanol 1methyl1,2ethanediylbisoxy bispropanol formula c3h8o2 c6h14o3 c9h20o4 cas number1 57556 25265718 24800440 einecs number 2003380 2467703 2464660 molecular weight 76. The atsdr toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the hazardous substance described here. Because of its high boiling point and affinity for water, ethylene glycol is a useful desiccant. Most corrosion from ethylene glycol is due to the decomposition to organic acids such as glycolic acid at higher temperatures. It is a clear, colorless liquid under normal conditions, and is widely used as a vehicle engine coolant due to its antifreeze properties. Prepare and analyze the filters together with working standards steps 5, 6, and 10 through 12.
Despite similarities in physical properties and chemical structure, ethylene glycol and propylene glycol have vastly different toxicities. Both chemicals are clear, colorless, odorless, sweettasting, highly viscous liquids. Glycol, which happen to be two of the most common in. It is unfair to rate a product a 1 and affect this sellers reputation and product because of a lack of understanding of what. It is a poly ethylene glycol, a diol and a primary alcohol. Possibility of hazardous reactions not established. Petro rabigh produces 600 kta of mono ethylene glycol meg through the most uptodate process and sells only in bulk quantities via petro rabigh terminal. Monoethylene glycol meg monoethylene glycol meg in its pure form, it is an odorless, colorless, syrupy liquid with a sweet taste.
The objective of this guideline is to assist poison center personnel in the outofhospital triage and initial management of patients with a suspected exposure to ethylene glycol by 1 describing the process by which the exposure might be evaluated, 2 identifying the key decision elements in managing the case, 3 providing clear and. Ethylene glycol based nanofluids containing various mass fractions of aln, si3n4, tin nanoparticles has been investigated. Ethylene glycol eg is a major industrial chemical used in the production of polyester fibers and films, antifreeze and vitrification formulations, and numerous other applications. Meg is the most widely used glycol in the global market. Unlike ethylene glycol, propylene glycol has no taste. Although ethylene glycol has two alcohol groups, its main application is as the main ingredient in antifreeze and not for fuel purposes. Ethylene glycol is widely used to inhibit the formation of natural gas clathrates hydrates in long multiphase pipelines that convey natural gas from remote gas fields to a gas processing facility.
Ethylene oxide reacts with water to produce ethylene glycol according to the chemical equation. Calculate recovery ethylene glycol recoveredethylene glycol taken. Triethylene glycol is a colorless liquid with a mild odor. The global ethylene glycols market demand was 16,511. Their chemical structures differ by only one methyl group ethylene glycol, hoch 2 ch 2 oh. A series of novel periodic copolyesters was synthesized and their physical properties and biodegradabilities were investigated. In 1941 modo started to produce ethylene oxide for further production of ethylene glycol. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. The brines considered here are aqueous solutions of ethylene glycoland of propylene.
Synthesis, properties and biodegradation of periodic. Other pertinent literature is also presented, but is described in less detail than the key studies. The widespread use of ethylene glycol as an antifreeze is based on its ability to lower the freezing point when mixed with water. Ethylene glycol definition of ethylene glycol by the. Synthesis, properties, and applications of polyethylene. Dear friends, can somebody help me give references web pages to find the waterethylene glycol mixture properties with varying ratio 50. Propylene glycol causes poisoning only rarely and under unusual circumstances. Engineering and operating guide for dowfrost and dowfrost hd. Ethylene glycol article about ethylene glycol by the.
Detailed studies of the enzymatic oxidation of ethylene glycol demonstrate that ethyl alcohol, the natural substrate, is a potent competitive inhibitor of the oxidation of ethylene glycol. Ethylene glycol and propylene glycol are manufactured chemicals that have similar physical properties and uses. Pdf ethylene glycol eg is an important organic compound and chemical intermediate used in a. Ethylene glycol may be used in the preparation of spiroborate esters by reacting with chiral 1,2aminoalcohols in the presence of triisopropyl borate. Other important uses of ethylene glycol include heat transfer fluids used as industrial coolants for gas compressors, heating, ventilating. Ethylene glycol is used to make antifreeze and deicing solutions for cars, airplanes, and boats. Ethylene glycol is used to manufacture antifreeze and deicing solutions for cars, airplanes, and boats. Waterethylene glycol mixture properties heat transfer. Effective june 19, 2015, the office of environmental health hazard assessment oehha is adding ethylene glycol ingested cas no. Excess volumes ve, viscosity deviation, excess refraction.
Treatment of ethylene glycol poisoning with ethyl alcohol. Thermo physical properties such as thermal conductivity and viscosity of. When ethylene oxide is processed further, it forms a sweet tasting colorless liquid called ethylene glycol monoethylene glycol meg. Nov 30, 2018 ethylene glycol is a source of corrosion. Ethylene glycol 5500 wikisource, the free online library. It has also been proposed that ethylene glycol can be produced from biomass like cellulose and. Department of health and human services, public health service. Ethylene glycol market share insights grand view research. The common name ethylene glycol literally means the glycol derived from ethylene. A simulation model of a reactor for ethylene oxide production. It is completely miscible with water and many organic liquids. A glycol is an alcohol with two hydroxyl groups on adjacent carbon atoms a 1,2diol. While chemically ethylene glycol is very similar to ethyl alcohol, both these compounds are toxic to man.
Aluminum alloy corrosion in the presence of ethylene glycol is presumed to be the result of acidic attack of these acids. Ethylene glycol article about ethylene glycol by the free. However, ethylene glycol can also be produced by pyrolysis of biomass. Removal or dilution of pools of glycol water solution is imperative, since the solution can feed a firesite.
The end uses for ethylene glycol are numerous see table 1. A 40percent solution of ethylene glycol in water has a freezing point of 25c, and a 60percent solution has a freezing point of 40c. Ethylene glycol, also called ethane1,2diol, the simplest member of the glycol family of organic compounds. Effect of the molecular weight of poly ethylene glycol on the. Volumetric properties of aqueous solutions of ethylene glycols in. Sep 26, 2019 agency for toxic substances and disease registry atsdr. Ethylene glycol based water solutions are common in heattransfer applications where the temperature in the heat transfer fluid can be below 32 o f 0 o c. To be fair ethylene glycol is not designed to make water bead or run off. Corresponding authors a hkust shenzhen research institute, no. Ethylene glycol heattransfer fluid engineering toolbox. Effect of the molecular weight of polyethylene glycol core.
Glycol ethers are a group of solvents based on alkyl ethers of ethylene glycol or propylene glycol commonly used in paints and cleaners. Al2o3 dispersed in water ethylene glycol mixtures as coolant in a carbon graphite. In the present work, we report the density of binary mixtures containing ethylene glycol eg, diethylene glycol. It kills fungus and micro organisms that create rot and therefore eat your word. It may also be used as a solvent in the preparation of tris 2,2. However, in applications where toxicity is a concern. Other important uses of ethylene glycol include heat transfer fluids used as industrial.
This reaction can be catalyzed by either acids or bases, or can occur at neutral ph under elevated temperatures. In the early 1960th the production of ethylene oxide based from ethanol and chlorohydrin was not considered cost effective. This is a brief description of the properties of the ethylene glycol for industrial porpouses. Ethylene glycol eg is the most commonly used organic solvent to fabricate nts.
Kister equation, and the corresponding parameters are derived. Glycerol is a c3 triol and ethylene glycol is also a polyol, but a c2 diol. Miscible in all proportions with water, alcohol, and acetone, it is poorly soluble in ether and insoluble in chloroform, aliphatic. The following chemical constituents of eg and pgbased antifreeze formulations are considered in the franklin associates, ltd. An important property of ethylene glycol is its capacity to produce a marked lowering of the freezing point of water. Ethylene glycol is a synthetic liquid substance that absorbs water. Densities and volumetric properties of ethylene glycol. Ethylene glycol based fluids are less viscous than propylene glycol based fluids. Tccs ethylene glycol meg is a toxic, colorless, practically odorless, lowvolatility, lowviscosity, hygroscopic liquid. It is a generally recognized as safe gras listed compound used in the food processing industry as an additive to keep foods from drying out and as a solvent for food colors and flavors.
Propylene glycol is also used to make polyester materials and in deicing fluids. Ethylene glycol is produced from ethylene ethene, via the intermediate ethylene oxide. It is also used in hydraulic brake fluids and inks used in stamp pads, ballpoint pens, and print shops. Furnace the two primary feedstocks for ethylene production are naphtha and natural gas ethane, propane, butane, etc. Nexantchemsystems, coal to meg, changing the rules of the game pdf. Isobaric heat capacity and density of ethylene glycol based. These solvents typically have a higher boiling point, together with the favorable solvent properties of lowermolecular weight ethers and alcohols. The first step in the production of ethylene is to take the feedstock and crack it into ethylene and other various products in a.
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