Comparative research on the catalytic activities of different molecular sieves for acetalization and ketalization

Molecular sieves with different acidities and pore-sizes have been applied to catalyze the acetalization and ketalization of carbonyl compounds with glycol. A comparative research on the catalytic activities of the catalysts for certain reactions has been carried out to figure out the relationship between the characters of the catalysts and the activities. The results show that the pore-size of the molecular sieves is one of the most important factors that determine the catalytic activity. Appropriate pore-size is needed for the certain reaction.The acidity is another factor that affects the activities. They also have great effects on the recycled activities of the catalysts.