Preparation of Phenols from Benzene Sulphonic AcidBenzenesulphonic acid can be obtained from benzene by reacting it with oleum. This benzene sulphonic acid can be treated with molten sodium hydroxide at high temperatures to encourage the formation of sodium phenoxide.
1 molecule of benzene can react only with 3 molecules of Cl2 to form Benzene hexachloride (BHC).
n-hexane when undergoes pyrolysis in presence of vanadium or chromium oxide as a catalyst and at high temperature and pressure, it forms benzene as a product.
All hydrocarbons, including toluene and benzene, can cause chemical pneumonitis by direct contact with the pulmonary parenchyma and destroying alveolar and capillary membranes. This results in vascular permeability and edema.
Toluene should be heated in presence of alkaline KMnO4 to carry out oxidation of Toluene. This process oxidizes toluene into potassium benzoate ions. Potassium benzoate ions are then followed by acidification to form benzoic acid.
Add 1. HNO3 and H2SO4. This will put a nitro group on benzene through electrophilic aromatic substitution, giving you nitrobenzene. Next, you can reduce this by using H2(g)/Pd over C, or Zn metal with HCl, this will give you aniline.
Toluene is made through catalytic reforming by passing a hydrocarbon mixture over a dehydrogenation catalyst. Hydrocarbon gases are removed, and an aromatic-rich fraction is obtained from the reformate. Toluene is then produced through distillation or solvent extraction (which is the more usual method).
Production. Toluene occurs naturally at low levels in crude oil and is a byproduct in the production of gasoline by a catalytic reformer or ethylene cracker. Final separation and purification is done by any of the distillation or solvent extraction processes used for BTX aromatics (benzene, toluene, and xylene isomers)
Benzyl alcohol is prepared from toluene by heating it with KMnO4 and Na2CO3 in aqu. solution for 1 and half hrs. It is then filtered & neutralized aqueous extracted by HCl to get solid benzoic acid.
Benzoic acid. Toluene on oxidation with CrO2Cl2 gievs benzaldehyde. This is Etard's reaction.
When Benzene reacted with Methyl chloride in presence anhydrous Aluminium chloride, then it produces Toluene. Anhydrous Aluminium chloride acts as catalyst .
Benzene reacts with chlorine or bromine in an electrophilic substitution reaction, but only in the presence of a catalyst. The catalyst is either aluminium chloride (or aluminium bromide if you are reacting benzene with bromine) or iron.