甲醇钠－环氧丙烷体系用于甲醇羰化

Application of MeONa PO Catalytic System to Methanol Carbonylation

报道环氧丙烷（ＰＯ）助催的甲醇钠催化剂体系用于甲醇的液相催化羰基化制取甲酸甲酯（ＭＦ）反应。试验研究的结果表明，采用连续搅拌釜式反应器（ＣＳＴＲ）和环氧丙烷作助催化剂，不仅可以大大降低甲醇钠催化剂的使用浓度而不降低其催化活性，同时也不会影响催化剂体系的选择性。助催化剂的助催活性与其浓度成正比关系。温度对催化体系活性的影响随催化剂浓度不同而不同。反应压力对催化体系的活性有较大的影响；当压力较低时，催化活性随压力增加而增大。不论是否加入ＰＯ助催化剂，生成ＭＦ的选择性均保持不变。

The catalytic system propylene oxide(PO) promoted sodium methoxide(MeONa)used for methanol carbonylation to methyl formate(MF)in the liquid phase has been studied and reported.The experimental results have demonstrated that the concentration of MeONa catalyst can be significantly reduced whereas its catalytic activities do not decrease when PO is used as promoter of MeONa catalyst and CSTR reactor/autoclave is used for the reaction.In the meantime,the selectivity of MeONa catalyst has not been affected and changed.The promotion of PO is directly proportional to the concentration of PO promoter.The effect of temperature on catalytic system depends on the concentration of the MeONa catalyst.Pressure has a remarkable influence on the activity of the catalytic system.Whether PO was added or not,the selectivity of forming MF is unaffected.