Abstract: A new method of extracting cinnam aldehyde from Cinnamomum cassia Presl bark was put forward. First, C. cassia P. bark was moistened with small amount of ethanol-water, then hot-water was added, so that ethanol-water solution inside the bark was boiled and the process of extraction was strengthened. The experimental results indicated that extraction yield which was higher than that of traditional water-extraction, was 2.43%.Only 1-5min was spent in each time of extraction, which is less than that of unconventional extraction methods such as microwave method. By analyzing the effect of temperature of hot water, it was found that a sudden rise of extraction rate occurred through convection when inner solution was boiled.

Key words: Cinnamomum cassia Presl bark, cinnam aldehyde