Acetylene | ethyne to ethanol

Acetylene gas is an alkyne and ethanol is an alcohol compound. Acetylene has two car atoms in that molecule and contains a triple bond. Ethanol also has two cabon atoms and -OH group in it's molecule.

acetylene to ethanol molecules


Acetylene / ethyne / C2H2

Ethanaol / ethyl alcohol / CH3CH2OH


In this question we are going to prepare ethanol from two methods.


Method 1

Ethyne to ethanol through ethene


Acetylene to ethene

First, acetylene is converted into ethene ( CH2 = CH2 ) using hydrogen gas and Lindlar catalyst. Ethene is an an alkene compound.


Lindlar catalyst

Alkynes are converted to alkenes by in the presence of hydrogen gas and lindlar catalyst.

lindlar reagent contains CaCO3, Pd and various forms of sulfur and lead


Ethene to ethanol

Then ethanol is prepared from the reaction of ethene with dilute sulfuric acid.

acetylene to ethanol conversion


Try more organic conversion questions and check answers



Method 2

Ethyne to ethanol through ethanal

Ethyne to ethanal

Acetylene reacts with HgSO4 and dilute H2SO4. It gives ethanal ( CH3CHO ). Ethanal is a aldehyde compound.

Ethanal to ethanol

Ethanl is reduced to ethanol by LiAlH4, ether. CH3CHO reacts with LiAlH4, ether, H2O to give ethanol.

NaBH4, Na / C2H5OH, H2 / Ni also can be used to reduce ethanl to ethanol.

acetylene to ethanol conversion through ethanal


Ethanal reduction reactions Learn CaC2 and acetylene industrial manufacturing process

How to obtain acetylene?

We can obtain acetylene gas from calcium carbide(CaC2). CaC2 react with water and give C2H2.

acetyle water reaction

Identify acetylene and ethanol

Acetylene is an alkyne compound and ethanol is an alcohol. Both acetylene and ethanol show acidic characteristics with Na and emits H2. But none of them react with NaOH. Acetylene gives a red precipitate with ammoniacal copper chloride and white precipitate with ammoniacal silver nitrate. But alcohol does not give such precipitates with those solutions.




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