Methyl tert butyl ether
Is MTBE still being used? According to the United States Environmental Protection Agency (EPA), "MTBE has not been used in significant amounts" in gasoline since 2005. However, groundwater in some parts of the country may still contain MTBE. And MTBE is still used as a gasoline additive in other parts of the world.
What is the problem with MTBE in gasoline?
Gasoline can contain up to 10-15% MTBE. The main problem with MTBE is that it is considered a carcinogen and is easily miscible with water. If gasoline containing MTBE leaks from an underground tank at a gas station, it can enter groundwater and contaminate wells.
Is ether a molecule?
Ether is the general name for a class of organic chemical compounds characterized by molecules that contain an ether functional group, an oxygen atom directly attached to two hydrocarbon groups (alkyl or aryl). A typical example is diethyl ether, commonly referred to as ether (ethoxyethane, CH3CH2OCH2CH3).
How is MTBE used in the United States?
MTBE can be blended with motor gasoline in the United States to produce a finished product that is then shipped to destinations in Mexico. MTBE was once a widely used fuel additive in the United States. The MTBE blend in motor gasoline peaked at 260,000 barrels per day in 1999.
Why is there a controversy about MTBE in gasoline?
Disputes over MTBE. Methyl tert-butyl ether (MTBE) is a gasoline additive used as an oxygenate and to increase the octane number. Its use has declined in the United States due to environmental and health concerns. The contaminated groundwater as a result of spillage or leakage of petrol containing MTBE at gas stations.
Why is methyl tert butyl ether ( MTBE ) banned?
Methyl tert-butyl ether (MTBE) is a flammable liquid that has been used as an additive for unleaded gasoline since the 1980s. MTBE increases the octane and oxygen content of gasoline and reduces pollutant emissions. Due to concerns about groundwater contamination and water quality, MTBE is currently banned or restricted in several states.
What happens if you put MTBE in the ground?
The basic axiom is that if you put fluid underground, it will eventually leak out, Fogg said. And once MTBE came out of underground storage, it didn't behave like other components in gasoline, which stick to the ground and break down. It remained intact and migrated with groundwater.
Why was MTBE banned in the state of Maryland?
The Energy Policy Act of 2005 forced gasoline refiners to replace MTBE with ethanol. In 2004, MTBE was discovered in pits near several gas stations in Harford County, Maryland. This prompted Maryland to take steps to ban MTBE.
Is mtbe still being used in the united states
The use of MTBE is still approved by the government for other industrial applications. With the enactment of the Federal Energy Act of 2005, the oxygen enrichment requirement for gasoline was removed from the new formula and a standard for renewable fuels was established. The lack of liability protection for MTBE has also led refineries to replace MTBE with ethanol as a gasoline additive.
When did MTBE become illegal in the US?
August 2005 Enactment of the US Energy Policy Act removes the 2% oxygen rule and includes a national renewable fuel standard that will double ethanol and biodiesel use by 2012. The Plus, NJ, becomes the 25th state to sell gasoline with MTBE.
When is the EPA going to set a standard for MTBE?
The EPA has not set a national standard for MTBE, although some states have set their own limits. By the end of the fall of 2000, EPA will publish a secondary standard for drinking water based on taste and smell.
Is mtbe still being used in the us
MTBE was once widely used in the United States, but was phased out in the late 2000s due to concerns about water pollution. Since then, ethanol fuel has replaced MTBE as a gasoline additive. MTBE is an oxygen-rich fuel that increases the octane number and allows for a more complete combustion in gasoline engines.
When did the MTBE fuel oxygenate go out of business?
However, in the late 1990s, MTBE consumption as an oxygen-rich fuel in the United States was on the cusp of declining. It all started when Alaskan drivers got dizzy when filling their tanks in the Arctic winter.
What can be used as an alternative to MTBE?
In 2003, California became the first state to begin replacing MTBE with ethanol. An alternative to ethanol is ETBE, which is made from ethanol and isobutene. Its effectiveness as an additive is comparable to MTBE, but is more expensive due to the higher price of ethanol compared to methanol.
Is mtbe still being used in europe
The other two ethers, ETBE and TAME, are also used in the US and especially in Europe. China and many other countries still use MTBE as the additive of choice, although more methanol is currently used in China.
What's the concentration of MTBE allowed in the EU?
Some argue that the criticism and consequent decline in its use is due to its easy detectability (taste) at extremely low concentrations (parts per billion), not its toxicity. The MTBE concentrations used in the EU (mostly -) and approved in Europe (maximum 5%) are lower than in California.
Where is MTBE still used as an octane booster?
MTBE is still widely used as a gasoline octane booster in Europe, the Middle East, Africa and Asia. The United States still produces MTBE, but mainly for the export market or as an export gasoline additive.
Is mtbe still being used in malaysia
Mtbe Malaysia Sdn Bhd was established in 1989. The company is engaged in the production of industrial organic chemicals. NEW.
Why is MTBE banned in the United States?
Due to concerns about groundwater contamination and water quality, MTBE is currently banned or restricted in several states. MTBE is also used in small amounts as a laboratory solvent and for some medical purposes.
When was MTBE phased out in the United States?
MTBE was once widely used in the United States, but was phased out in the late 2000s due to concerns about water pollution. Since then, ethanol fuel has replaced MTBE as a gasoline additive.
Is ethanol a good replacement for MTBE?
Ethanol is currently the most suitable replacement for MTBE for several reasons. First, ethanol production capacity is currently quite large and growing, and appears sufficient to produce the large amount of oxygenate needed to replace MTBE.
When was MTBE banned?
Several states have banned MTBE without waiting for federal restrictions. California banned the use of MTBE as a fuel additive in 2002. New York State banned the use of MTBE as a fuel additive in 2004.
What does MTBE dissolve in?
Like most ethers and alcohols, MTBE is readily soluble in water. When it reaches the ground, rainwater can dissolve MTBE and transport it through the ground to the groundwater. Spills or leaks from storage containers can penetrate deeper soils and contaminate groundwater, especially near factories, pipelines and shipping facilities.
When did MTBE start being added to gasoline?
Since the enactment of the Clean Air Act of 1990, a significant amount of MTBE has been added to gasoline.
Which is heavier 10 weight percent gasoline or MTBE?
Why did the price of gasoline go down?
The wholesale price of gasoline fell by 272 yuan (CNY) from the previous year as alternative energy sources became available and there was less speculation in the gasoline market. Gasoline consumption in the reporting period remained relatively high.
How much does it cost to make MTBE per barrel?
These are the smallest and cheapest MTBE plants that can be built with daily production rates of $6,000 to $10,000 per barrel (3) • Commercial Plants: Commercial plants isomerize normal butane to isobutane, dehydrate isobutane to isobutylene, and then produce MTBE.
What are the health effects of MTBE in humans?
Workers in industries that manufacture and transport MTBE or refine gasoline may be exposed to increased exposure. The impact of MTBE on human health at low doses in the environment is unknown. Animal studies with high doses of MTBE have shown effects such as skin and eye irritation.
Why does MTBE leak from underground storage tanks?
The leakage problem is partly due to the lack of effective regulation for underground reservoirs, but overflow leaks also contribute. MTBE, which occurs in unleaded gasoline, is the most water-soluble component.
What is the problem with mtbe in gasoline today
The main problem with MTBE is that it is considered a carcinogen and is easily miscible with water. If gasoline containing MTBE leaks from an underground tank at a gas station, it can enter groundwater and contaminate wells.
Is there a ban on MTBE in gasoline?
That year, the amount of fuel added to gasoline was 38,000 barrels per day. However, between 2000 and 2007, 23 states enacted partial or complete bans on the use of MTBE mixed with motor gasoline due to concerns about groundwater contamination.
What kind of gas is MTBE made of?
MTBE is one of the main chemicals currently produced from isobutylene (methylpropene) by the acid-catalyzed addition of methyl alcohol. Methyl tert-butyl ether (MTBE) is a common gasoline additive commonly found in drinking water.
Why do you add MTBE to your gasoline?
MTBE is added to gasoline for two reasons: It increases the octane number (see This Question of the Day for a discussion of octane). It is an oxygenate, which means that when it burns, it adds oxygen to the reaction (see This Question of the Day for a discussion of oxidants).
When was methyl tertiary butyl ether ( MTBE ) used in gasoline?
MTBE has been used in small amounts in gasoline since 1979 to replace lead as an octane booster (helps prevent engine knocking). Between 1992 and 2005, some gasoline used higher concentrations of MTBE to meet oxygen requirements established by Congress in the Clean Air Act amendments of 1990.
Why was MTBE used as an octane enhancer?
At room temperature, MTBE is a colorless, flammable, volatile liquid that dissolves relatively easily in water. Why was it used? MTBE has been used in small amounts in gasoline since 1979 to replace lead as an octane booster (helps prevent engine knocking).
When did the Clean Air Act require MTBE?
Amendments to the Clean Air Act of 1990 (CAA) required the use of oxygenated gasoline in areas with unhealthy air pollution. The CAA did not specifically require MTBE.
What is the problem with mtbe in gasoline use
After the Clean Air Act of 1990, MTBE was added significantly to gasoline. Gasoline can contain up to 10-15% MTBE. The main problem with MTBE is that it is considered a carcinogen and is easily miscible with water.
What is the problem with mtbe in gasoline production
MTBE is a substance that contains oxygen and increases the octane number of gasoline. Its use has declined in the United States due to environmental and health concerns. The contaminated groundwater as a result of spillage or leakage of petrol containing MTBE at gas stations.
How is MTBE a contaminant of water and air?
MTBE has become a major water pollutant (when gasoline escapes from underground tanks (UST) and comes into contact with groundwater) and, to a lesser extent, air (when it enters the gas pump despite being unloaded) relatively soon after the first rains ). In addition, MTBE photochemically decomposes relatively quickly in air.
What are the side effects of gasoline additive MTBE?
MTBE is a gasoline additive that can damage various organs and organ systems, including the skin, eyes, respiratory tract and central nervous system. Depending on the route of exposure, MTBE may cause headache, nausea, chronic respiratory tract irritation, ataxia or hypotension.
Is it bad to drink water with MTBE in it?
Due to its increased use, MTBE has contaminated some water sources in the United States, mainly due to leaks from underground gas tanks. Although it has been scientifically proven that drinking water containing MTBE has no harmful effects on health, even in very low concentrations it has an unpleasant taste and odor.
How is MTBE harmful to the human body?
Skin exposure to MTBE can be particularly dangerous because it can be absorbed through the skin and into the body. MTBE is a gasoline additive and is therefore used in gasoline to refuel vehicles.
What is an example of an ether compound?
Examples of ether. Examples of ether compounds are: pentabromodiphenyl ether. Diisopropyl ether. Polyethylene glycol anisole (PEG). Dioxane. Ethylene Oxide.
What are the chemical properties of ether?
Chemical Properties of Ethers: Ethers usually undergo two types of chemical reactions: Cleavage of the CO bond: Ethers are usually highly reactive. If an excess of hydrogen halide is added to the ether, the CO bond is broken and alkyl halides are formed.
What does ether mean in chemistry?
In chemistry, an ether is a series of organic compounds containing an oxygen atom surrounded by two hydrocarbon chains (alkyl) or aromatic rings (aryl). A common ether is diethyl ether (CH3CH2OCH2CH3), which is commonly referred to as ether.
What is the function of ether?
Ether is used to trick miners into processing transactions and protecting the network from spam, as each step of the calculation requires small units of ether.
Is ether a molecule or formula
In the IUPAC nomenclature system, ethers are named with the general formula alkoxyalkane, e.g. methoxyethane CH3-CH2-O-CH3. When the ester is part of a more complex molecule, it is described as a substituent alkoxy, therefore —OCH3 must be read as a methoxy group are considered.
What is the structural formula for ether?
Ether is an organic compound that contains two alkyl or aryl groups via an oxygen atom. The general formula for ether is MMR.
What is the molecular weight of ether?
The empirical formula and molecular weight of diethyl ether: C 4H 10O and g/mol. It is a colorless, highly volatile and flammable liquid (boiling point °C ). In its molecular structure, there are two ethyl groups (CH2CH3) connected by an oxygen atom (C2H5OC2H5).
Is ether a neutral compound?
A pure and neutral compound is obtained by evaporation of ether. However, the main connection gets stuck in the water and is no longer the same. It is now an ion. If you want the parent compound in its pure form, you have to remove that proton.
Is ether organic or inorganic?
Ether is an organic molecule containing carbon, hydrogen and oxygen atoms while petroleum ether is a mixture of hydrocarbons.
Is ether a molecule or molecules
Ethers are compounds containing the functional group –O–. Ethers don't have a special suffix like the other types of molecules you've mentioned so far. In the IUPAC system, as in the case of alkanes, the oxygen atom and the smallest carbon arm are called the alkoxy substituent and the rest of the molecule is called the backbone.
Is ether a molecule made
IUPAC - The molecule consists of an ethoxy group attached to the ethane chain, therefore IUPAC will call it ethoxyethane. General: The groups attached to the oxygen atom are ethyl groups, so the common name would be diethyl ether.
Is ether a molecule or atom
When an oxygen atom is connected by single bonds, the molecule is alcohol or ether. Alcohols and ethers can be structural isomers of each other.
Methyl tert-butyl ether (mtbe)
Methyl tert-butyl ether (MTBE) is a flammable liquid that has been used as an additive for unleaded gasoline since the 1980s; MTBE increases the octane and oxygen content of gasoline and reduces pollutant emissions. Due to concerns about groundwater contamination and water quality, MTBE is currently banned or restricted in several states.
Methyl tert butyl ether msds
MSDS Name: Methyl Tert-Butyl Ether Index Numbers: E1274, E127J4, E127RS200, NC9765209, NC9938190 Synonyms: tert-butyl methyl ether MBE 2-methoxy-2-methylpropane 2-methyl-2-methoxypropane MTBE-methyl tert-butyl ether.