Today, we are going to talk about preparation of nitro benzene in the laboratory. Apparatus which include in the preparation of nitro benzene contain a reflux condenser, round bottom flask. Chemicals involved in the preparation of nitro benzene are sulphuric acid, nitric acid and benzene. Procedure of preparation of nitro benzene is first we take 20 ml sake acid in round bottom flask.
After that add 20 ml nitric acid slowly and continuously shaking. After that add 15 ml benzene 2 to 3 ml at a time with shaking and maintaining temperature at 40 degree Celsius. After that fit the round bottom flask with condenser and fix all the apparatus with stand. Now, maintain the temperature about 50 to 60 degree Celsius. The fumes form and go up in to the reflux condenser,where they cool down and again converted into liquid.
This process is repeated for 45 minutes. After that separates the round bottom flask from condenser. Now,pure the liquid into the separating funnel shake it well and fix it on the stand. After sometime two layers were form. lower layer will be acid and up layer will be nitro benzene . Remove the lower layer of acid by opening the stopper of separating funnel. Now, add distilled water in the separating funnel, shake it well and again fix it on the stand.
After sometime to layers will be form. Upper layer will be water and lower layer will be nitro benzene. Remove the lower layer of nitro benzene by opening the stopper of separating funnel. Now, add calcium chloride into the nitro benzene for moisture absorption and then filter it. Your nitro benzene will be prepared in the laboratory by using following procedure.