双乙酸钠合成新方法

New method for preparing sodium diacetate

以工业碳酸钠和试剂冰醋酸为原料,水为溶剂一步合成双乙酸钠的新工艺,确定了最佳工艺条件nCH3COOH∶nNa2CO3=6.87∶1;nH2O∶nNa2CO3=12∶1,反应温度70℃,反应时间1.5h,产品收率达96.8%,产品质量达联合国粮农组织和世界卫生组织1994年公布标准。用工业Na2CO3代替试剂Na2CO3,生产成本降低了350元/t。

A new method for preparing sodium diacetate by one step reaction based on acetic acid and industral grade Na2CO3（water is solvent） was studied The optimum conditions were determined as follows： the ratio of acetic acid to sodium carbonate is 6.87：1（molar）,the ratio of water to sodium carbonate is 12：1（molar）,reaction temperature is 70℃,reaction time is 1.5 h . The yield of the product was 96.8%,the product quality was up to FAO/WHO standard in 1994,It reduces costs 350 yuan RMB/t that industral grade Na2CO3 instead of chemical pure Na2 CP3.