Method for synthesizing 2,3,5,6-tetrachloropyridine and co-producing manganous-manganic oxide

The invention discloses a method for synthesizing 2,3,5,6-tetrachloropyridine and co-producing manganous-manganic oxide. With one or more of ester, lower alcohol and methylbenzene as the solvent, inorganic ammonium salt as the catalyst and manganese powder as the reducing agent, pentachloropyridine is reduced into tetrachloropyridine, and manganese powder is converted into manganous chloride or hydroxyl manganese chloride; manganous chloride or hydroxyl manganese chloride is oxidized by air to obtain manganous-manganic oxide. The method has the advantages of being high in reaction efficiency, mild in reaction condition and the like, the two products including 2,3,5,6-tetrachloropyridine and manganous-manganic oxide with high specific surface area can be obtained at the same time, the tetrachloropyridine purity reaches 98% or above, and the specific surface area of manganous-manganic oxide is 30-53 m /g. 本发明公开了种制备2，3，5，6-四氯吡啶并联产四氧化三锰的方法。以酯、低碳醇或甲苯中的种或多种为溶剂，以无机铵盐为催化剂，以锰粉作还原剂，将五氯吡啶还原为四氯吡啶，锰粉转化为二氯化锰或羟基氯化锰；以空气氧化二氯化