甲醇直接氧化合成二甲氧基甲烷催化剂的研究

二甲氧基甲烷是重要的有机化工原料，在溶剂、化工中间体、制氢和燃料添加剂等领域应用广泛,以甲醇为原料一步合成二甲氧基甲烷是C1化工的研究新热点。以TiO₂为载体，通过负载V₂O₅并采用Ti(SO₄)₂改性制备V₂O₅/TiO₂-SO₄^2-催化剂，在温度（135～150） ℃、V（CH₃OH）∶V（O₂）∶V（N₂）=1∶（1.5～4）∶（7～20）和原料气流量(5 000～8 000) mL·(g·h)^-1条件下，将甲醇直接氧化合成二甲氧基甲烷。结果表明，甲醇转化率为48%，二甲氧基甲烷选择性为80%。

Research on the catalysts for synthesis of dimethoxymethane from methanol direct oxidation

Dimethoxymethane is a kind of important organic chemical materials,and is widely used in the field of solvents,chemical intermediates,hydrogen production and fuel additives. One step synthesis of dimethoxymethane from methanol is a new research hot spot of C1 chemicals. Using Ti O2 as the carrier,V2O5/ Ti O2-SO2-4catalysts were prepared by loading V2O5 and modifying by Ti（ SO4）2. The catalysts were used for dimethoxymethane synthesis from methanol direct oxidation. The results showed that methanol conversion of 48% and the selectivity to dimethoxymethane of 80% were attained under the condition as follows： reaction temperature（ 135-150） ℃,V（ CH3OH） ∶ V（ O2） ∶ V（ N2） = 1∶（ 1. 5-4） ∶（ 7-20）,and raw gas flow rate（ 5 000-8 000） m L·（ g·h）-1.