sulfuric acid T=20 - 25°C; 3 h; Product distribution / selectivity;

1: bis-trimethylsilyl ether With methanol; sulfuric acid T=5 - 10°C; 1 h; 2: monomethyl trimethoxy silane T=5 - 10°C; 1.5 - 1.75 h; 3: With sulfuric acid; water Product distribution / selectivity; more than 3 stages;