1: With sulfuric acid; sulfur trioxide T=20 - 80°C; 1.66 h; 2: With sodium sulfite; water T=20 - 80°C; 2 h; Product distribution / selectivity;

1: With sulfuric acid; sulfur trioxide T=20 - 80°C; 1.33 h; 2: With water T=20 - 80°C; 1.5 - 2 h; Product distribution / selectivity;