No abstract

A novel heterogeneous strong acid catalyst has been synthesized through the copolymerization of p-toluenesulfonic acid and paraformaldehyde with sulfuric acid as catalyst. The novel catalyst owns the strong acidity as much as 4.0 mmol/g, while Nafion and Amberlyst-15 only has the acidity of about 0.8 mmol/g. Furthermore, the catalyst possesses the advantages of the high thermal stability (200°C) and low cost for the simple synthetic procedure. The catalytic activities of the novel catalyst were taken through esterification of acetic acid and ethanol and acetalization of benzolaldehyde and 1,2-ethandiol. The results showed that the novel catalyst showed much higher activities than the Amberlyst-15 and owned even the comparative activity to sulfuric acid, which made the catalyst hold great potential for the replacement of the traditional homogeneous catalyst for the green process.

No abstract