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Product Name:Ethanol
Molecular format:C2H6O
CAS No.:64-17-5
Product molecular structure:
Chemical Properties:
Ethanol is highly soluble in water and organic
solvents, but poorly soluble in fats and oils. Ethanol itself is a good
solvent, which is used in cosmetics, paints and tinctures[2]. Density of
ethanol at 68 °F (20 °C) is 789 g/l. Pure ethanol is neutral (pH ~7). Most
alcoholic beverages are more or less acidic.
Ethanol/ethyl alcohol is highly flammable liquid, hygroscopic, and fully
miscible in water. Ethanol is incompatible with a large number of chemicals
such as strong oxidising agents, acids, alkali metals, ammonia, hydrazine,
peroxides, sodium, acid anhydrides, calcium hypochlorite, chromyl chloride,
nitrosyl perchlorate, bromine pentafluoride, perchloric acid, silver nitrate,
mercuric nitrate, potassium tert-butoxide, magnesium perchlorate, acid
chlorides, platinum, uranium hexafluoride, silver oxide, iodine heptafluoride,
acetyl bromide, disulphuryl difluoride, acetyl chloride, permanganic acid,
ruthenium (VIII) oxide, uranyl perchlorate, and potassium dioxide.
Application:
Medical
A solution of 70-85% of ethanol is commonly used as a disinfectant and it kills
organisms by denaturing their proteins and dissolving their lipids. It is effective
against most bacteria and fungi, and many viruses, but is ineffective against
bacterial spores. This disinfectant property of ethanol is the reason that
alcoholic beverages can be stored for a long time[9]. Ethanol also has many
medical uses, and can be found in products such as medicines, medical wipes and
as an antiseptic in most antibacterial hand sanitizer gels. Ethanal can also be
used as antidote. It competitively blocks the formation of toxic metabolites in
toxic alcohol ingestions by having a higher affinity for the enzyme Alcohol
Dehydrogenase (ADH). Its chief application is in methanol and ethylene glycol
ingestions. Ethanol can be administered by the oral, nasogastric or intravenous
route to maintain a blood ethanol concentration of 100-150 mg/dl (22-33
mol/L)[10].
Fuel
Ethanol is flammable and burns more cleanly than many other fuels. Ethanol has
been used in cars since Henry Ford designed his 1908 Model T to operate on
alcohol. In Brazil and the United States, the use of ethanol from sugar cane
and grain as car fuel has been promoted by government programs[11]. The
Brazilian ethanol program started as a way to reduce the reliance on oil
imports, but it was soon realized that it had important environmental and
social benefits[12]. The fully combusted products of ethanol are only carbon
dioxide and water. For this reason, it is environmental friendly and has been
used to fuel public buses in the US. However, pure ethanol attacks certain
rubber and plastic materials and cannot be used in unmodified car engines[13].
The alcohol-based alternative fuel that is blended with gasoline to produce a
fuel with a higher octane rating and fewer harmful emissions than unblended
gasoline. A mixture containing gasoline with at least 10% ethanol is known as
gasohol. Specifically, gasoline with 10% ethanol content is known as E10.
Another common gasohol variant is E15, which contains 15% ethanol and 85%
gasoline. E15 is only appropriate for use in Flex Fuel vehicles or a very small
percentage of the newest vehicles[14]. In addition, E85 is a term used for a
mixture of 15% gasoline and 85% ethanol. E85 keeps the fuel system clean
because it burns cleaner than regular gas or diesel and doesn't leave behind
gummy deposits. Beginning with the model year 1999, a number of vehicles in the
U.S. were manufactured so as to be able to run on E85 fuel without
modification. These vehicles are often labeled dual fuel or flexible fuel
vehicles, since they can automatically detect the type of fuel and change the
engine's behavior to compensate for the different ways that they burn in the
engine cylinders[15].
The use of ethanol-diesel fuel blends is growing around the world, and are
designed to provide renewable, cleaner burning fuel alternatives for off-road
equipment, buses, semi-trucks and other vehicles that run on diesel fuel. With
the addition of ethanol and other fuel additives to diesel, the characteristic
black diesel smoke is eliminated and there are significant reductions in
particulate matter, carbon monoxide, and nitrogen oxide emissions. It is also
possible to use ethanol for cooking as a replacement for wood, charcoal,
propane, or as a substitute for lighting fuels, such as kerosene[16].
Brazil and the United States lead the industrial production of ethanol fuel,
accounting together for 89% of the world's production in 2008. In comparison
with the USA and Brazil, Europe ethanol for fuel production is still very
modest. Brazil is the world's second largest producer of ethanol fuel and the
world's largest exporter[17].
Beverage
Significant volumes of ethanol are produced for the beverage and industrial
markets from agricultural feedstock. Ethanol produced for these industries
differs from ethanol for fuel only in its strength, which can vary between 96%
and 99.9% and in its purity, depending on the end use. Beverage and drinks
industry may be the best-known end-user of ethanol. It is used to make many
kinds of spirits, such vodka, gin and anisette. High standards and processes
are required for ethanal used in the production of spirit drinks.
Others
The ethanol used as an intermediary product by the chemical, pharmaceutical or
cosmetics industry is in many cases of the highest and purest possible quality.
These are premium markets due to the additional steps in the alcohol production
process that are necessary to achieve the required purity. Same high standards
and purity requirements apply in food industry, such as flavors and aromas
extraction and concentrations, as well as paints and thermometers. Ethanol can
be used in de-icer or anti-freeze to clear the car windscreen. It also is
contained in perfumes, deodorants, and other cosmetics[18].