PhOMe was acylated with Ac2O to p-AcC6H4OMe in MeNO2 on nanocomposite SiO2-supported Nafion catalyst at 95 degrees C for 3 h to compare the catalytic activity of the catalysts with known alumosilicate catalysts. The highest conversion (40%) was achieved when unsupported Nafion NR50 was used as the catalyst. The economic efficiency of the catalyst use was much higher for the cheap alumosilicate catalysts than for the polymeric ones.