MTBE


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MTBE

Abbreviation for methyl-tert-butyl ether.

MTBE

Methyl-tert-butyl-ether.

Environment
A volatile, flammable, and colourless octane-boosting aliphatic ether which is added to reformulated gasoline to help it burn cleaner. While it is not listed by the IARC/WHO as a carcinogen, it imparts an unpleasant taste to water at very low concentrations (5–15µg/l) and persists in groundwater. It is biodegraded by bacteria and can be removed by a fluidised bed bioreactor or activated carbon.

Surgery
MTBE rapidly dissolves cholesterol stones in vivo, introduced under local anaesthesia via a percutaneous transhepatic cholecystectomy catheter as a non-invasive method for treating gallstones. After injection, the dissolved cholesterol is drained from the bladder. MTBE stone dissolution is effective if the patients are selected for cholesterol stones; it is improved and accelerated by adding transcutaneous ultrasound.
 
Complications
Nausea, vomiting, bile leakage, drowsiness, transient increase of liver enzymes, anorexia, hypotension.

MTBE

Methyl-tert-butyl-ether Surgery An aliphatic ether that rapidly dissolves cholesterol stones in vivo, introduced under local anesthesia via a percutaneous transhepatic cholecystectomy catheter, as a non-invasive method for treating gallstones; after injection, the dissolved 'slurry' is drained from the bladder Complications N&V, bile leakage, drowsiness, transient ↑ of liver enzymes, anorexia, hypotension; MTBE stone dissolution is effective if the Pts are selected for cholesterol stones, improved and accelerated by adding transcutaneous ultrasound. See Lithotripsy EnvironmentAn octane-boosting additive used in reformulated gasoline that helps the gas burn cleaner.
References in periodicals archive ?
Adding MTBE to increase the octane number has become the most economical means to meet the gasoline standard in China.
From a water supply perspective, the ban will help prevent further MTBE contamination of groundwater.
Despite the growing concerns over the use of MTBE, few biochemical data on this chemical have been published.
More troubling, the massive plume of MTBE was migrating toward Los Angeles Department of Water and Power wells.
When both senators and representatives alike promised to scuttle the entire energy bill if the MTBE provisions remained, the conference committee rejected the deal and adopted language that would permit either party in an MTBE-related suit to seek to be heard in federal court.
Our specific objectives were to compare potential for and rates of MTBE removal from contaminated groundwater in field plots amended with oxygen.
Lawsuits were filed against MTBE producers, refineries, oil companies, and several local gas stations and distributors.
Unfortunately, as an ether, MTBE has a chemical attraction to water molecules.
Under the House provision, manufacturers and gasoline companies were granted total immunity from suits alleging that MTBE is a defective product--to date, the only successful theory in litigation seeking cleanup costs.
Ethanol is less persistent than MTBE in the environment, but it appears to enhance the diffusion of benzene, a carcinogen and a major ingredient in gasoline, when ethanol-enriched gas leaks from tanks.