ester synthesis

[skanic]

will i have a triglyceride if i mix 3 parts oil (or butter) in 1 part of glycerol ?

[skanic]

and if i had a little h2so4 ?

[Rhodium]

Heating aliphatic carboxylic acids with glycerol (and optionally a catalytic amount of a strong mineral acid) will esterify the components to form various triglyceride esters. The procedure is called Fischer esterification. It will not happen at room temperature (>100°C is suitable) or in aqueous solution.

Neither "oil" or "butter" could be classified as "aliphatic carboxylic acids" though. Stearic acid could, however, and is the main constituent of top-grade old-style candles.

Here is a PPT presentation dealing with the esterification of Glycerol with Stearic Acid, forming Tristearin (a triglyceride ester):

http://www.chem.uic.edu/wardrop/teaching/chem234/files/WARDROP-234-17.ppt

[skanic]

thank you.
You will take me for a fool but i don't understand something,
Do fatty acids that are in oil (corn oil for example) are separated(one by one) OR are they assembled together in complexes (triglycerides) ?
please repond

[Rhodium]

Both vegetabilic oils and animal fats come as triglyceride molecules:

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/F/Fats.html

Free fatty acids are relatively uncommon to find in large amounts in nature:

http://en.wikipedia.org/wiki/Fat