MTBE Methyl Tertiary Butyl

Reactive distillation is used in the production of MTBE (methyl tertiary butyl ether)... 

The largest U.S. methanol markets were for producing the gasoline additive MTBE (methyl tertiary butyl ether) as well as formaldehyde and acetic acid. MTBE is being phased out since it has been found to contaminate water supplies. 

Cation-exchange resins are used as catalysts in the produdion of MTBE (methyl tertiary-butyl ether, 2-methoxy-2-methylpropane) and various other oxygenates and, lately, also in the dimerization of isobutene [30]. Other commercial applications of the cation-exchange resins indude dehydration of alcohols, alkylation of phenols, condensation readions, alkene hydration, purification of phenol, ester hydrolysis and other reactions [31]. The major producers of ion-exchange resins are Sybron Chemicals Incorporated [32] (Lewatit resins), Dow Chemical Company [33] (DOWEX resins), Purolite [28] (Purolite resins), and Rohm and Haas Company [27] (Amberlyst resins). 

Isobutylene is the most chemically reactive of the butylene isopiers. If the objective is just to get the isobutylene out of the C4 stream, it can be removed by reaction with methanol (CH3OH) to make MTBE (methyl tertiary butyl ether), by reaction with water to make TBA (tertiary butyl alcohol), by polymerization, or by solvent extraction. After that, butene-1 can be removed by selective adsorption or by distillation. That leaves the butene-2 components, together with iso- and normal butane, which are generally used as feed to an alkylation plant. 

Methanol, CH3OH, the simplest alcohol, is made by reacting CO and H2 at high pressures over a catalyst. Methanol is a liquid at room temperature and is highly toxic. It is used to make formaldehyde, acetic acid, and other chemical intermediates. It is also used as a feedstock for MTBE (methyl tertiary butyl ether), a gasoline-blending component. 

Methyl fert-Butyl Ether MTBE Methyl Tertiary Butyl Ether Noncyclic Aliphatic or Aromatic Ethers Tetrahydrofuran Organophosphonates... 

MTBE Methyl tertiary butyl ether—an ether made from methanol and iso-butylene that is used widely in reformulated and oxygenated gasolines. 

Ethyl Tertiary Butyl Ether (ETBE) An aliphatic ether similar to MTBE (Methyl Tertiary Butyl Ether). This fuel oxygenate is manufactured by reacting isobutylene with ethanol. Having high octane and low volatility characteristics, ETBE can be added to gasoline up to a level of approximately 17% by volume. ETBE is not yet commercially available. 

Methanol, also known as wood alcohol, is another widely discussed potential source (or carrier) of hydrogen.31 Chemically, methanol, ch oh, is a clear liquid, the simplest of the alcohols, with one carbon atom per molecule. Methanol is extensively used today— U.S. demand in 2002 exceeded 2 billion gallons. The largest U.S. methanol markets are for producing the gasoline additive mtbe (methyl tertiary butyl ether) as well as formaldehyde and acetic acid. 

Standard Oil of California added the petrochemicals of Gulf Oil, purchased in 1984, to its subsidiary Chevron Chemical. Other United States petrochemical producers took advantage of special circumstances. Amoco was served by a strong terephthalic (TPA) base and its good performance in polypropylene Arco, by its Lyondell subsidiary in Channelview, Texas, and by its development of the Oxirane process through which propylene oxide could be produced by direct oxidation with styrene as a coproduct. The process also led to MTBE (methyl tertiary-butyl ether), the antiknock agent used as a substitute for tetraethyl lead. 

The introduction of catalytic converters has had a tremendous impact on the composition of gasoline. The catalysts used became poisoned by small amounts of impurities in particular the lead compounds present in high octane gasoline were detrimental. Processes which produce high octane number compounds were therefore stimulated. First, cracking and reforming increased in importance. More recently, the aromatics content is also expected to have to decrease and alternative processes are in use or under way, e.g. the production of MTBE (methyl tertiary-butyl ether). 

Isobutene is used for tbe production of MTBE (methyl tertiary butyl ether) which nowadays is used little in the US market but is widely used as a gasoline octane booster in many countries. 

Prior to installation of a 9 ft (2.7 m) diameter packed column for removal of TCE (trichloroethylene), DIPE (diisopropyi ether), and MTBE (methyl tertiary butyl ether) from a municipal well water supply, a pilot study was performed using a 12 in. (30.5 cm) packed column. Packing material, hquid and air flow rates, and removal efficiencies were evaluated for the compounds present. In the pilot study, TCE, which has a higher Henry s constant than DIPE, was found to be more readily removed. Based on these findings, a full-scale design resulting in 99.9% removal of DIPE was implemented. 

In RFG, the most commonly used oxygenates are MTBE (methyl tertiary butyl ether) and ethanol. As a component of RFG, MTBE plays a role in reducing total hydrocarbons, air toxics, and However, it... 

Oxygenates like MTBE (methyl tertiary butyl ether) were developed in the 1970s as octane enhancers to replace toxic additives like lead, which have been phased out of gasoline. The presence of oxygenates in gasoline promotes cleaner fuel combustion within the engine, boosts fuel octane values and reduces vehicle air emissions. 

Ethylene is the largest volume carbon-based chemical produced in the United States. Moreover, ethylene can be converted directly to transportable fuels (ethanol or high-octane gasoline) or high-volume petrochemicals, such as ethylene glycol. Similarly, methanol is a liquid and can be used directly as a turbine or transportation fuel. It can also be converted to MTBE (methyl tertiary butyl ether) by alkylation with isobutylene. Oxyhydrochlorination of methane includes production of methylchloride as an intermediate to the production of gasoline. 

MTBE - Methyl Tertiary Butyl Ether (MTBE) is an ether compound used as a gasoline blending component to raise the oxygen content of gasoline. MTBE is made by combining isobutylene (from various refining and chemical processes) and methanol (usually made from natural gas). 

MTBE methyl tertiary-butyl ether PO propylene oxide SAPO silico-aluminophosphate SBU secondary building unit SDA structure-directing agent TBAOH tetrabutylammonium hydroxide TBHP a -butyl hydroperoxide TBOT tetrabutyl orthotitanate TEA tetraethylammonium... 

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