| abstract |
The invention relates to a process for obtaining ansolution of sodium methoxide used as an intermediatento the synthesis of medicines and pesticides fromnpyrethroid class or as catalyst for synthesisnformic acid, by the reaction between the amalgamnSodium and dry methanol have a content ofnmaximum 0.001% water, in a column type reactor,nwith filling made of metal ringsncarbon steel activates by heating, at reflux, in ansolution containing 10 ... 30% NaMnO4, for 10 ...n... 50min. and drying, the volumetric flow rate being 3 m3 / hnsodium amalgam and 0.8 m3 / h methanol at room temperaturen60 ° C and atmospheric pressure, with circulationncountercurrent, the circulating sodium amalgamnfrom bottom to top, and methanol from top to bottom, with dischargenof the methanolic solution of sodium methoxide formednby spilling over to the top andnrecirculareamercureamur separated from metallic sodium, atnelectrolysis cells. |