Production of Acetone from 2-propanol

We have deal with theory involving acetone on the following link Aldehydes and ketone hear we going to show you practical step involve in the production of acetone from 2-propanol.

Materials

1. 20ml 70% propanol (isopropyl)
2. 100 ml acidic dichromate (K2Cr2O7/H2SO4) solution
3. Distillation apparatus
4. Distil water
5. 500ml beaker
6. 250ml beaker
7. Stirring rode

Laboratory procedure

Step 1

First you have to prepare an ice/bath; this done by placing an ice block on a 500ml beaker.

Step 2

Preparation of 2-propanol mixture;

Measure 20ml of 70% of 2-propanol into 250ml beaker, add 20ml of distilled water stir the mixture, on the process the mixture will raise in temperature, then cool the temperature by place the 250ml beaker mixture on the 500ml prepared ice bath, allow the temperature to cool to 10°C.

Step 3

Addition of dichromate (K2Cr2O7/H2SO4) solution.

Without removing the prepared mixture from the water bath, add 100ml of dichromate (K2Cr2O7/H2SO4) solution, wait in a few second the solution will turn dark, with sudden increase of the temperature to about 56 to 65°C.

CAUTION: the solution is corrosive

Now stir the mixture with stirring rode while still on the ice bath until the temperature fall to 50°C.

The mixture is now set to distilled acetone out.

Step 4

Turn the mixture into a 250ml beaker or a larger distilling flask using funnel to avoid the mixture been spilled away.

Now set up a distillation apparatus as show bellow to distilled out the acetone

Heat the mixture gently, the liquid should start boiling after 10 to 15 minute, and acetone should started dropping on the receiver. Take note of the temperature at which first drop appear and record it down, continue with the distillation until 5ml of acetone is collected, record