How do you make benzene from benzoic acid?

Answer 1

Benzoic acid is produced commercially by partial oxidation of toluene with oxygen. Cobalt or manganese naphthenates are usually used as catalysts. Benzoic acid is found naturally in many plants and is an intermediate in the biosynthesis of many secondary metabolites.

Answer 2

Benzene cannot be directly synthesized from benzoic acid. However, benzoic acid can be converted to benzene through a series of steps involving decarboxylation, which removes the carboxylic acid group to yield benzene. This conversion typically involves heating benzoic acid with a strong reducing agent under specific conditions.

Answer 3

Its prepared by oxidation of benzyl alcohol by KMnO4 in presence of Na2CO3.

These three reagents are taken in a flask with 100 ml of distilled water..This mixture is boiled for about half and hour...Completion of reaction is indicated by discoloration of parmangnate...(MnO4- is reduced to MnO2 in this case).To get the acid this mixture is acidified with HCl (conc.) and 20%Na2SO3 is added with continuous shaking until all the MnO2 is completely dissolved and only the white ppt. of acid remains in the mixture which can b easily filtered out.

Answer 4

take reflux apparatus using 250 ml flask. place 2ml of benzonitrile, 25ml of 10% NaoH Solution and 2 boiling chips in the flask and reflux for 40-50 min by heating. Place a wet paper at the moutrh of the condenser(to verify removal of NH3 gas). Remove the flask when oily droplet of benzonitrile have dissolved. Decant the content into beaker, chill the mixture ina an ice bath and slowly acidify by adding conc. HCl drop by drop,with constant stirring. Check completion of neutralisation by litmus paper. Filter and wash the precipitate with cold water and recyrstallise the product from boiling point. Determine the yield, percentage and the melting point of crude and recrystallised sample.

Answer 5

Convert benzene to methyl benzene by reacting it with CH3Cl and anhydrous AlCl3.

Oxidize methyl benzene with a powerful oxidizing agent like alkaline KMnO4.

Answer 6

By Friedel crafts acylation, ie treating benzene with any CH3COX, where X is a halide.

Answer 7

You can turn chlorobenzene into a grinard reagent and react it with formaldehyde to form benzyl alcohol, then use a strong oxidizer like jones reagent to convert it to the acid.

Answer 8

Diazotise benzene amine (or aniline) followed by treatment with KCN/CuCN to obtain benzonitrile.

Hydrolysis of benzonitrile catalysed by acid will give benzoic acid.

Answer 9

First convert into benzene.Heat with Zn dust.Then add CH3-Cl+anhydrous AlCl3.Then add hot concentrated KMnO4.

Answer 10

Decarboxylation