Polyvinylpolypyrrolidone Supported Brønsted Acidic Catalyst for Esterification

Figure 1

Conversion of acetic acid catalyzed by PVPP-BSHSO₄ catalysts synthesized with different mole ratios of BS to the pyrrolidone repeat unit of PVPP. (Reaction conditions: n-butanol 96 mmol, acetic acid 80 mmol, PVPP-BSHSO₄ catalyst 8 wt%, and 90°C for 3 h.)