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Topic: Dimethyl ether

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luminiferous ether

dimethyl ether

diethyl ether

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Ether Song

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	Green Car Congress: World Bank Supports Chinese Coal to Dimethyl Ether Project
		IFC is investing in a Xinao subsidiary—Xinneng Chemical—by buying shares worth up to $10 million and granting a $40 million loan for the plant that will convert coal into dimethyl ether (DME).
		Japan’s Toyo Engineering, for example, is designing and building a 210,000 tps coal-to-dimethyl ether (DME) with the Ningxia Coal Group in northwestern China’s Ningxia Hui Autonomous Region.
		Coal to liquids are just another nail in the coffin in which the planet is being buried.
	www.greencarcongress.com /2006/08/world_bank_supp.html (742 words)

	Dimethyl ether - Wikipedia, the free encyclopedia
		Dimethyl ether, also known as methoxymethane, oxybismethane, methyl ether, wood ether, and DME, is a colorless gaseous ether with an ethereal odor.
		It has the formula CH Dimethyl ether is used as an aerosol spray propellant.
		Dimethyl ether is also a clean-burning alternative to liquified petroleum gas, liquified natural gas, diesel and gasoline.
	en.wikipedia.org /wiki/Dimethyl_ether (157 words)

	Ether - Wikipedia, the free encyclopedia
		Ether is the general name for a class of chemical compounds which contain an ether group — an oxygen atom connected to two (substituted) alkyl groups.
		Ethers are not to be confused with the following classes of compounds with the same general structure R-O-R. Aromatic compounds like furan where the oxygen is part of the aromatic system.
		In a primary ether this carbon is connected to only one other carbon as in diethyl ether CH An example of a secondary ether is diisopropyl ether (CH and that of a tertiary ether is di-tert-butyl ether (CH Dimethyl ether, a primary, a secondary, and a tertiary ether.
	en.wikipedia.org /wiki/Ether (764 words)

	ChemViz Isomers Lab (Site not responding. Last check: 2007-11-06)
		The boiling point of dimethyl ether is -24.9 °C and for ethanol is 78.5 °C at atmospheric pressure.
		Hence, dimethyl ether is a gas and ethanol is a liquid at room temperature and pressure.
		Compute the change in total energy of dimethyl ether when one of its hydrogen atoms is removed (CH In Nanocad, delete a H atom from dimethyl ether to create this molecule.
	chemviz.ncsa.uiuc.edu /content/lab-s-isomers.html (1175 words)

	[No title]
		Glycol ethers are federal hazardous air pollutants and were identified as toxic air contaminants in April 1993 under AB 2728.
		The physical properties and characteristics of glycol ethers are described in Tables I and II (Howard, 1990; Merck, 1989; Sax, 1989; U.S. EPA, 1994a).
		Glycol ethers also contributed to the total hazard index in 18 of the approximately 107 risk assessments reporting a total acute hazard index greater than 1, and presented an individual hazard index greater than 1 in 9 of these risk assessments (OEHHA, 1996b).
	www.scorecard.org /chemical-profiles/html/glycol_ethers.html (1391 words)

	Dimethyl ether Degradation Pathway (Site not responding. Last check: 2007-11-06)
		Dimethyl ether, also known as methyl ether or wood ether, is a colorless gas that has been used in refrigeration applications.
		Dimethyl ether has also been shown to be oxidized by methanotrophic bacteria but it does not serve as a growth substrate for those bacteria (Meyers AJ Jr., 1982).
		The following is a text-format Dimethyl ether pathway map.
	umbbd.msi.umn.edu /dme/dme_map.html (167 words)

	Dimethyl ether: laboratory assignments and predictions through 600 GHz.
		Dimethyl ether: laboratory assignments and predictions through 600 GHz.
		Dimethyl ether (CH_3_OCH_3_) is a well-known interstellar molecule with a large abundance in hot core regions.
		The lines arising from the ground vibrational state have been combined with previous data, mainly at lower frequencies, to form a global data set consisting of over 1600 lines that have been assigned and fitted by an effective Hamiltonian method.
	www.cs.wisc.edu /niagara/data/nasa/ApJ_500_1059.xml (245 words)

	NTP: Abstract for Teratology: Diethylene glycol dimethyl ether
		Diethylene glycol dimethyl ether (DYME), a widely used organic solvent, is structurally related to several compounds which produce reproductive and developmental toxicity, including teratogenicity in laboratory animals.
		In conclusion, exposure of NZW rabbits to diethylene glycol dimethyl ether at 25 mg/kg/day during major organogenesis produced no adverse maternal or developmental effects.
		Doses of 50 and 100 mg/kg/day were associated with adverse developmental effects, but did not produce distinctive evidence of maternal toxicity.
	ntp-server.niehs.nih.gov /ntpweb/index.cfm?objectid=073024FB-D1D4-3798-75B2D2BA2B125A46 (491 words)

	International Journal of Chemical Reactor Engineering
		Dimethyl ether (DME) is regarded as an environmentally benign fuel for vehicles.
		Two kinds of reactor technologies for DME synthesis have been proposed by previous researchers: the fixed-bed and the slurry reactor.
		The optimal H2/CO ratio is between 1.0-1.5, and increasing the pressure is shown to improve the reactor performance.
	www.bepress.com /ijcre/vol1/S2 (377 words)

	Diethylene Glycol Dimethyl Ether (CICADS 41, 2002)
		Diglyme is manufactured in a closed system by the catalytic conversion of dimethyl ether and ethylene oxide under elevated pressure (1000–1500 kPa) and temperatures (50–60 °C) with a maximum yield of 60%.
		Hardin BD (1983) Reproductive toxicity of the glycol ethers.
		Hardin BD, Eisenmann CJ (1986) Relative potency of four ethylene glycol ethers for induction of paw malformations in the mouse.
	www.inchem.org /documents/cicads/cicads/cicad41.htm (14645 words)

	Dimethyl Ether has found commercial use as a refrigerant. It has as a solvent, as an extraction agent, a propellant in ...
		Dimethyl Ether has found commercial use as a refrigerant.
		It has as a solvent, as an extraction agent, a propellant in aerosols, and fuel in welding cutting and brazing.
		Uses: Dimethyl Ether has found commercial use as a refrigerant, solvent, as an extraction agent, a propellant in aerosols, and fuel in welding cutting and brazing.
	www.c-f-c.com /gaslink/pure/dimethylether.htm (125 words)

	L6. OXIDATION CHEMISTRY OF DIMETHYL ETHER RELATED TO ITS PROPERTIES AS A DIESEL FUEL
		Recently, there has been substantial interest in the use of dimethyl ether (DME) as a potential diesel fuel in compression-ignition engines.
		This interest arises primarily because dimethyl ether has a very high cetane number (>55) and inherently low exhaust particulate emissions.
		methyl tertiary butyl ether (MTBE) and tert-amyl methyl ether (TAME)] are used as octane enhancers in gasoline.
	www.cstl.nist.gov /div838/kinet_conf/agenda/l_session/l6.html (452 words)

	O-Methyltransferases Involved in the Biosynthesis of Volatile Phenolic Derivatives in Rose Petals -- Lavid et al. 129 ...
		C, A reaction using orcinol monomethyl ether as the substrate with OOMT2 as the enzyme (similar results were obtained with OOMT1).
		Peak 1, orcinol; peak 2, orcinol monomethyl ether; and peak 3, orcinol dimethyl ether.
		Orcinol dimethyl ether is one of the most common volatiles of rose flowers, and it is known to contribute up to 60% of the
	www.plantphysiol.org /cgi/content/full/129/4/1899 (4622 words)

	High-Pressure Vapor-Liquid Equilibrium for Dimethyl Ether + Ethanol and Dimethyl Ether + Ethanol + Water (Site not responding. Last check: 2007-11-06)
		High-Pressure Vapor-Liquid Equilibrium for Dimethyl Ether + Ethanol and Dimethyl Ether + Ethanol + Water
		The first part of this paper is a review of experimental methods and the high-pressure phase behavior of dimethyl ether systems for which data have been published between 1932 and 1999.
		The second part of this paper is high-pressure vapor-liquid equilibrium (VLE) data for the systems dimethyl ether (DME) + ethanol at (332.95, 353.25, and 373.15) K and dimethyl ether + ethanol + water at (333.55, 353.55, and 373.65) K. The experimental data are correlated using the Elliott-Suresh-Donohue (ESD-EOS) and Peng Robinson (PR-EOS) equations of state.
	pubs.acs.org /cgi-bin/abstract.cgi/jceaax/2000/45/i06/abs/je000109m.html (162 words)

	Aerosol Generation by Metered-Dose Inhalers Containing Dimethyl Ether/Propane Inverse Microemulsions
		Water soluble compounds were incorporated into metered-dose inhalers (MDIs) by using water-in-propellant lecithin microemulsions, in which dimethyl ether (DME) and propane acted as both continuous phase and propellant.
		However, solubilization of polar compounds into dimethyl ether (DME) and DME/propane utilizing lecithin inverse microemulsions has been previously reported by the current authors.
		Water soluble compounds were incorporated into solution phase MDIs, in which dimethyl ether (DME) and propane acted as both continuous phase and propellant.
	www.aapspharmscitech.org /view.asp?art=pt040458 (3267 words)

	Dimethyl ether - BioenergyWiki
		You can help us by editing this page: add information, links, images or any other changes you want!
		Dimethyl ether (CH), also known as methoxymethane, oxybismethane, methyl ether, wood ether or DME.
		It can be used as a substitute for liquified petroleum gas, liquified natural gas, diesel and gasoline.
	www.bioenergywiki.net /index.php/Dimethyl_ether (152 words)

	Undergraduate research students
		The Structure of the Dimethyl Ether-CO van der Waals Complex from Microwave Spectroscopy, J.J. Newby, R.A. Peebles, S.A. Peebles, J.
		Tunneling Motions and the Barrier to Inversion in the Dimethyl Ether—CS van der Waals Dimer, S.A. Peebles, R.A. Peebles, J.J. Newby and M.M. Serafin, Chem.
		Michal Serafin (Fall 2004, Spring 2005, Fall 2005, Spring 2006) - is currently working on ab initio calculations of dimethyl sulfide (DMS) systems (his results on DMS-CO formed the subject of the poster that he presented at the Third Annual Undergraduate Research Celebration in the Department of Chemistry on November 1st 2004).
	www.ux1.eiu.edu /~cfsap/Undergrads.htm (885 words)

	Influence of Protonation on Internal Rotation of Dimethyl Ether (Site not responding. Last check: 2007-11-06)
		Influence of Protonation on Internal Rotation of Dimethyl Ether
		A model is proposed for the influence of protonation on ether potential surfaces.
		The model invokes the quantum-mechanical effect of protonation on the oxygen lone pair and its consequence on the internal rotation barriers and associated torsional rotation energy levels.
	pubs.acs.org /cgi-bin/abstract.cgi/jpcafh/2000/104/i14/abs/jp994359p.html (162 words)

	(OAIC) DIMETHYL ETHER AN ALTERNATIVE PROPELLANTS FOR AEROSOL H... (Site not responding. Last check: 2007-11-06)
		A detailed analysis, complete with charts and graphs, showing the properties of dimethyl ether (DME) as a propellant for aerosol hairspray, and a comparison of DME with other hydrocarbon (HC) propellants in hairspray applications.
		The author's focus of what they refer to as the ability to use DME in conjunction with polar hairspray polymers, i.e.
		ODS, core, aerosol sector, dymethyl ether, hydrocarbons, propane, alternative technologies - aerosol, butane, iso-butane, ethanol, resins, solvents, propellants, formulations, stability, chemical properties, DME, HCs, hair sprays, cloud point, polar, nonpolar, polymers, Aerosol Age, United States, journal articles, Bartlett, Nowak, Daly, National Starch & Chemical, DuPont, 1985.
	es.epa.gov /p2pubs/oaic/952.html (190 words)

	Alternative Fuels and Refurmulated Fuels
		A Comparison of CO and NO Emissions from Propane, n-Butane, and Dimethyl Ether Premixed Flames.
		Objective: To determine a methodology for operating a production turbodiesel engine on dimethyl ether and demonstrate the performance, emissions and durability of the conversion approach in a Faculty/Staff shuttle bus on the University Park campus of the Pennsylvania State University.
		Emission Characteristics of a Navistar 7.3L Turbodiesel Fueled with Blends of Dimethyl Ether and Diesel Fuel.
	www.ems.psu.edu /~boehman/altfuels.html (1749 words)

	M3. Dimethyl-ether Radical + O2 and the Respective Adduct Radical + O2 Reactions (Site not responding. Last check: 2007-11-06)
		to form a peroxy adduct, which has a relatively low energy barrier to H atom transfer (isomerization) to form a methyl radical (adjacent to an ether group) hydroperoxide.
		Further reaction, beta scission, of this radical to CH also has a barrier which is below the enthalpy of dimethyl ether radical + O
		The stabilized isomer resulting from a hydrogen shift to the peroxy radical in the dimethyl ether + O
	www.cstl.nist.gov /nist838/kinet_conf/agenda/m_session/m3/m3.html (311 words)

	[No title]
		Airgas - Dimethyl Ether CP Size 200 Customer owned CGA 510
		Dimethyl Ether is a colorless, highly flammable gas with a slight ether-like odor.
		Dimethyl Ether CP Size 200 Customer owned CGA 510
	www.airgas.com /browse/product.aspx?Msg=RecID&recIds=341445 (136 words)

	(OAIC) USE OF DIMETHYL ETHER FOR REDUCTION OF VOC CONTENT (Site not responding. Last check: 2007-11-06)
		USE OF DIMETHYL ETHER FOR REDUCTION OF VOC CONTENT
		Dimethyl ether, DME, can be an invaluable tool for reducing volatile organic compound (VOC) content in aerosol products ranging from fragrances to industrial products and paints.
		While DME is a VOC, it has a short atmospheric lifetime of under one month, and can be used in a product to replace more serious VOCs, with DME as a solvent or as a co-solvent to water.
	es.epa.gov /p2pubs/oaic/986.html (245 words)

	Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures (US6984765)
		The present invention is a separation process for producing a methanol, ethanol and/or dimethyl ether stream from a first stream containing C
		(c) adsorbing dimethyl ether from propane with a crystalline microporous material that preferentially adsorbs dimethyl ether over propane to form a propane stream.
		Process for the removal of dimethyl ether contained as an impurity in liquid olefinic C3-C5 feeds
	www.delphion.com /details?pn=US06984765__ (454 words)

	IngentaConnect Liquid phase methanol and dimethyl ether synthesis from syngas (Site not responding. Last check: 2007-11-06)
		Liquid phase methanol and dimethyl ether synthesis from syngas
		By varying the mass ratios of methanol synthesis catalyst to methanol dehydration catalyst, it is possible to co-produce DME and methanol in any fixed proportion, from 5% DME to 95% DMEAlso, dual catalysts exhibit higher activity, and more importantly these activities are sustained for a longer catalyst on-stream life by alleviating catalyst deactivation.
		Keywords: dimethyl ether (DME); methanol; alcohol; diesel fuel; LPG; fuel cell; olefins; aerosol; syngas; natural gas; coal; biomass; methanol; oxygenates; ethers; kinetics; thermodynamics; slurry; liquid phase; catalyst deactivation
	www.ingentaconnect.com /content/klu/toca/2005/00000032/F0020003/00002891 (209 words)

	dimethyl ether concept from the Astronomy knowledge base (Site not responding. Last check: 2007-11-06)
		dimethyl ether concept from the Astronomy knowledge base
		physical object > natural object > particle > molecule > interstellar molecule > dimethyl ether
		Next interstellar molecule: ethyl alcohol Up: interstellar molecule Previous interstellar molecule: cyanogen radical
	www.site.uottawa.ca:4321 /astronomy/dimethylether.html (58 words)

	Supplier and Producer of Monoglyme, Diglyme, Triglyme, Tetraglyme, Butyl Diglyme, Proglyme (Dipropylene glycol dimethyl ...
		Glymes are end capped polyethylene glycols or polypropylene glycols, e.g polyglycol dimethyl ethers.
		Polyethylene glycol dimethyl ethers (MW 200, 250, 500, 1000, 2000), Polyglyme
		Informations about polyethylene glycol dimethyl ethers as Absorption Liquids to remove compounds like H
	www.glymes.com (429 words)

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