以维生素C(VC)和K2CO3为主要原料,合成维生素C-K盐,最佳结晶条件为乙醇滴加量2∶1(乙醇量∶反应液量)、结晶温度-2℃、结晶时间6h。实验证明在此试验条件下,收率可提高到95%,含量99.6%以上。 Vitamin C (VC) and K2CO3 as the main raw materials, the synthesis of vitamin C-K salt, the optimum crystallization conditions for ethanol dropwise volume 2: 1 (ethanol volume: reaction liquid volume), the crystallization temperature -2 ℃, crystallization time 6h. Experiments show that in this test conditions, the yield can be increased to 95%, content of 99.6%.