H SO ,KHSO etc…., it undergoes dehydration to form acrolein. CH CH CHO Prop - - enal (acrolein) KHSO Propane - , , - triol Oxidation Glycerol can give rise to a variety of oxidation products depending on the nature of the oxidising agent used for oxidation. a) Oxidation of glycerol with dil. HNO gives glyceric acid and tartronic acid.
b) Oxidation of glycerol with Conc. HNO gives mainly glyceric acid. c) Oxidation of glycerol with bismuth nitrate gives as meso oxalic acid. d) Oxidation of glycerol with Br /H O (or) NaOBr (or) Fenton's reagent (FeSO + H O ) gives a mixture of glyceraldehyde and dihydroxy acetone(This mixture is named as glycerose).
e) On oxidation with HIO or Lead tetra acetate (LTA) it gives formaldehyde and formic acid. f) Acidified KMnO oxidises glycerol into oxalicacid. XII U11-Hydroxy XII U11-Hydroxy - - - - CH OH CHOH [O] [O] Glyceraldehyde Glyceric acid Dihydroxyacetone CH OH CH OH CH OH CHOH CH OH [O] [O] Glycerol Mesooxalic acid [O] [O] Tart onic acid r CHO CHOH CH OH COOH COOH COOH COOH COOH COOH CHOH COOH ( , -dihydroxypropanal) ( , -dihydroxypropan - -one) ( -Oxopropane - , dioic acid) ( , -dihydroxypropanoic acid) ( hydroxypropane- , -dioic acid) Oxalic acid (ethan- , -dioic acid) Uses of alcohols Uses of methanol : . Methanol is used as a solvent for paints, varnishes, shellac, gums, cement, etc.
. In the manufacture of dyes, drugs, perfumes and formaldehyde. Uses of ethanol: . It is also used in the preparation of a) Paints and varnishes.
b) Organic compounds like ether, chloroform, iodoform, etc., c) Dyes, transparent soaps. . As a substitute for petrol under the name power alcohol used as fuel for aeroplane . It is used as a preservative for biological specimens.
Uses of ethylene glycol: . Ethylene glycol is used as an antifreeze in automobile radiator . Its dinitrate is used as an explosive with TNG. Uses of glycerol .
Glycerol is used as a sweetening agent in confectionary and beverages. .