Cinnamic acid is a spice and medicine, and its preparation experiment can be achieved through the following steps:

Materials:

-cinnamylalcohol

-sulfuric acid

-flask

-boilingchips

-cooling tube (condenser)

-hotwaterbath

-distilledwater

-base

Steps:

1. Add cinnamyl alcohol and a small amount of sulfuric acid to the flask, add boiling stone and stir evenly.

2. Put the flask into the cooling tube and hot water tank, and heat it to about 70℃.

3. Pour in water from the cooling tube to cool and collect the reaction materials.

4. Add distilled water and adjust the pH with alkali.

5. Distill, recover and refine the product to obtain cinnamic acid.

Notes:

1. Wear protective glasses and gloves during the experiment and maintain good ventilation.

2. Sulfuric acid is a strong acid and must be handled with care to avoid contact with skin and eyes.

3. Pay attention to temperature control during the reaction process to avoid dangerous reactions.

4. The use of alkali must be careful to avoid reacting with acid to produce gas.