Step 1: Fermentation of Ethanol to Acetone

- Materials: Ethanol, yeast, water, fermentation vessel

- Procedure:

1. Dissolve yeast in warm water and add it to the ethanol in the fermentation vessel.

2. Seal the vessel and allow it to ferment at room temperature for several days.

3. Monitor the fermentation process by observing the production of carbon dioxide gas.

4. Once fermentation is complete, distill the fermented mixture to obtain acetone.

Step 2: Condensation of Acetone to Diacetone Alcohol

- Materials: Acetone, concentrated sulfuric acid, ice-water bath

- Procedure:

1. Add acetone to a round-bottom flask equipped with a reflux condenser.

2. Slowly add concentrated sulfuric acid to the acetone while stirring, keeping the temperature below 10°C using an ice-water bath.

3. Reflux the reaction mixture for several hours.

4. Cool the reaction mixture and pour it onto ice to quench the reaction.

5. Extract the diacetone alcohol using a suitable organic solvent, such as diethyl ether.

6. Wash the organic layer with water and dry it over anhydrous sodium sulfate.

7. Distill the organic layer to obtain pure diacetone alcohol.

By following these steps, ethanol can be successfully converted into diacetone alcohol through fermentation and subsequent condensation reactions.