MTBE


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MTBE

(organic chemistry)
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The following oxygenates are used in petrol blends: methyl tertiary-butyl ether (MTBE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary-butyl alcohol (TBA; 2-methyl-2-propanol), diisopropyl ether (DIPE), ethanol (EtOH), and methanol (MeOH).
In the 1990s, after Congress required as a smog-reduction measure a higher oxygen content for gasoline sold in certain markets, oil companies began using bigger amounts of MTBE because it was the least expensive oxygenate to manufacture and thus the most profitable.
According to the American Cancer Society, "though MTBE has been used as a fuel additive since 1979, there have been no long-term studies of the ability of MTBE to cause cancer in workers or other people exposed to high concentrations."
A number of techniques have been employed for the removal of MTBE and benzene from contaminated water.
Coletta, state Department of Environmental Protection spokesman, said the MTBE is flowing south through bedrock fractures, and Exxon has been named the responsible party for 18 tainted wells out of the 55 private wells being monitored in the area.
Originally implemented in November 1992, it requires 2.7 percent oxygen in gasoline by weight, which is equivalent to 15.0 percent MTBE or 7.4 percent ethanol by volume.
Thomas Burack, commissioner of the New Hampshire Department of Environmental Services, said the results have led to active monitoring of public drinking water supplies for MTBE contamination.
(2005) apply continuation with respect to catalyst mass (or reactive tray holdup) to obtain converged solutions for MTBE and methyl acetate RD columns.
SciTech21-10 October 2006-Microvi Biotech Cleared to Begin California Demonstration of Its Groundwater-Based MTBE Decontaminant(C)2006 JeraOne - http://www.jeraone.com
MTBE has been used in the United States (U.S.) gasoline since 1979, in low levels (between 0.5 to 3.5% w/v) to replace lead.
Posteriormente, se macero por 24 horas con una mezcla de eter tertbutilmetilico (MTBE):metanol(MeOH) en una proporcion 9:1.
Methanol Institute president and CEO John Lynn recently remarked that while the rapid transition from methyl tertiary butyl ether (MTBE) to ethanol in reformulated gas (RFG) has been identified as one cause of the recent increase in fuel prices, Congress and President Bush, not MTBE, should be faulted, as they "failed to heed warnings that 270 days is simply not enough time to retool the nation's transportation fuels market to accommodate ethanol."