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When a compound is 'esterified' it means that an ester group has been added to the molecule. This is accomplished via condensation of an alcohol and an acid. The reaction results in a hydroxyl group (OH) being replaced by an alkyl group (RO).
Esterification changes a compound's water solubility, makes it more volatile, and often more aromatic.
Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product.
Wiki User
∙ 9y ago
Wiki User
∙ 13y agoTrans ester means- we are converting an already existing ester to another ester.
eg we may have an ester say - methyl oleate. This is already an ester.We can react thisd with any alochol - say with Butanol or Ethylene Glycol to get the corresponding esters. In this process we will get back methanol in this case. A typical example is making of Bio diesel. In this process a Vegetable oil is reacted with Methanol to get the methyl esters of the oil. We will get Glycerine as a by product.
WHEREAS ESTERIFICATION IS REACTING A - ACID WITH ALCOHOL. We get Water & the ester as products.
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How can you tell sodium hydroxide acted as a catalyst?
Sodium hydroxide anhydrous is used as a catalyst for the transesterification reactions of methanol and triglycerides.
Usage of methanol?
Methanol is used as: biodiesel transesterification,fuel Cell Hydrogen Carrier,wastewater Denitrification and Transportation Fuel.
What is potassium methylate?
Potassium methylate is 98% methanol with elemental potassium used in transesterification of vegetable oils into methyl ester (biodiesel).
What is the difference between trans-esterification and esterification processes in methyl esters?
esterification -----> ROH + R'-COOH -------> R'COOR acid with alcohol gives ester transesterification ROH + R'COOR'' -------- > R'COOR change of alkyl group present with R'COO by using a alcohol if you want to http://en.wikipedia.org/wiki/Transesterification Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. H3C-COOH + HO-CH2-CH3 → H3C-COO-CH2-CH3 + H2O Transesterification is the process of exchanging the alkoxy group of an ester compound with another alcohol. These reactions are often catalyzed by the addition of an acid or base.
Why is methanol rather than ethanol preferred for transesterification in the refining of soybean oil to make biodiesel?
May be because it gives more volatile esters, easy to separate or concentrate or strip off.
What has the author J K Haken written?
J. K. Haken has written: 'Synthesis of acrylic esters by transesterification, 1967' -- subject(s): Acrylates, Esterification, Methacrylates, Organic compounds, Synthesis
Who discovered biodiesel?
1853 by scientists, E. Duffy and J. Patrick, conducted the first transesterification of a vegetable oil, many years before the first diesel engine became fully functional.
Why jatropha curcas can be an important energy crop?
Jatropha curcas seeds have a high oil content that can be processed into biodiesel via transesterification. Jatropha will also grow in arid and/or depleted soil where other crops may not thrive.
What do you mean by transestrification?
Transesterification is used in the production of bio-diesels and polyesters. It means interesterification. For better clarification, there is a reaction between an ester of one alcohol and a second alcohol to form an ester of the second alcohol. The alcohol from the original ester as that of methyl acetate and ethyl alcohol turn to form ethyl acetate and methyl alcohol.
What is Biodiesel made from?
Soybeans and other vegetation. Biodiesel is made through a chemical process called transesterification whereby the glycerin is separated from the fat or vegetable oil. The process leaves behind two products -- methyl esters (the chemical name for biodiesel) and glycerin (a valuable byproduct usually sold to be used in soaps and other products).
What is wood alcohol use for?
Answer: Wood alcohol is also called methanol, methyl alcohol, Carbinol, wood naptha or wood spirits. It's used as an antifreeze, solvent, fuel and as a denaturant for ethyl alcohol. It's also used for producing biodiesel via transesterification reaction. It can also be used [on occasion] to clean wounds, but is painful.WARNING: Do NOT under ANY circumstances drink isoprpyl alcohol. A drop will cost you the loss of your sight, and any more than that will definitely kill you.(Just thought I should add that in there, in case anyone gets the idea of drinking it - it has happened before.)
How do you make a biodiesel?
Biodiesel begins with virgin vegetable oils (such as soybean, rapeseed, palm, or coconut oils), animal fats and fish oils, or recycled cooking oils. Manufacturers rely on a chemical reaction called "transesterification" in which they react the chemically acidic vegetable oils with methanol (a base) and add a catalyst. Fat molecules in the oil are broken into fatty acid methyl esters (FAME) or alkyl esters.
