Ethylbenzene


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Ethylbenzene

A component of paint formations and associated with some carpeting, ethylbenzene off-gases in the home, in office furniture products, in office buildings, and in a subject’s breath. Ethylbenzene is considered a chronic toxin.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ethylbenzene

 

C6H5CH2CH3, a colorless liquid with a boiling point of 136.2°C, a melting point of –94.97°C, and a density of 0.867 g/cm3 at 20°C. Ethylbenzene is almost insoluble in water, but it dissolves in ethanol, benzene, ether, and carbon tetrachloride.

Ethylbenzene is found in petroleum and coal tar. It is usually produced industrially from benzene and ethylene by the Friedel-Crafts reaction. By passing ethylbenzene vapors over catalysts, styrene is produced; styrene is used as a raw material in the production of important industrial products, including certain types of plastics (seePOLYSTYRENE) and synthetic rubbers. Ethylbenzene is also used in organic synthesis; for example, acetophenone is produced by the liquid-phase catalytic oxidation of the hydrocarbon. Ethylbenzene is also used as a solvent and component of high-octane gasolines. The maximum permissible concentration of ethylbenzene vapor in the air is 0.05 mg per liter.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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[2] Gomez S., McMillan L., McGregor J., Axel J., Al-Yassir N., Al-Khattaf S., Gladden L.: "New perspective on catalytic dehydrogenation of ethylbenzene: the influence of side-reactions on catalytic performance" Catal.
Colorado School of Public Health studies found air pollutants near fracking sites linked to neurological and respiratory problems and cancer.121, 122 The study, based on three years of monitoring at Colorado sites, found several "potentially toxic petroleum hydrocarbons in the air near gas wells including benzene, ethylbenzene, toluene, and xylene." Lisa McKenzie, PhD, MPH, Research Associate at the Colorado School of Public Health.
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The main aromatic hydrocarbons present in gasoline are benzene, toluene, ethylbenzene, and xylene isomers, also known as BTEX8, benzene being the simplest and most common representative of these aromatics, both because of its composition and the fact that it is always present in mixtures.
One of the main uses of benzene is an intermediate in synthesizing other chemicals such as nitrobenzene, cumene, ethylbenzene, aniline, and cyclohexane.
The reactors can be used to build new or retrofit existing ethylbenzene to styrene dehydrogenation facilities, butane to butene, or isobutane to isobutene plants.
Note that it reports a single value for the sum of ethylbenzene and xylene isomers due to their similar molecular weight.
The Brio Refining toxic Superfund site, where ethylbenzene, chlorinated hydrocarbons and other chemical compounds were once pooled in pits before the Environmental Protection Agency removed them, sits "just up the road, and it drains into our watershed," he said.
The challenge at hand dealt with four specific contaminants that FPL wants to flush underground--the pesticide heptachlor and industrial solvents ethylbenzene, toluene, and tetrachloroethylene.