摘要
[ Objective] The aim was to find optimum reaction conditions for synthetic process of Vitamin C. [ Method] Vitamin C sodium was used as raw material to prepare vitamin C through acidification, separation, desalination, recovery and purification. The impact of reaction time, tempera-ture, feedstock molar ratio and water content on the yield of vitamin C were investigated in the experiment. [Result] The optimum reaction condi- tions for synthetic process of Vitamin C were as follows： in the acidification test, reaction time 120 min, temperature 20 -30 ℃, the molar ratio be-tween hydrochloric acid and Vitamin C sodium 1 ： 1 and water content 41.0%. Under the above condition, the purity and yield of vitamin C reach 99.80% and 94.74% respectively. [Conclusion] The process can decrease consumption, enhance quality and recover of the product, improve the environmental pollution, shorten processing periods and reduce production cost. Thus, the process is suitable for industrialization. Key words Vitamin C; Vitamin C sodium; Acidification; China
[Objective]The aim was to find optimum reaction conditions for synthetic process of Vitamin C.[Method]Vitamin C sodium was used as raw material to prepare vitamin C through acidification,separation,desalination,recovery and purification.The impact of reaction time,temperature,feedstock molar ratio and water content on the yield of vitamin C were investigated in the experiment.[Result]The optimum reaction conditions for synthetic process of Vitamin C were as follows:in the acidification test,reaction time 120 min,temperature 20-30℃,the molar ratio between hydrochloric acid and Vitamin C sodium 1:1 and water content 41.0%.Under the above condition,the purity and yield of vitamin C reach 99.80% and 94.74% respectively.[Conclusion]The process can decrease consumption,enhance quality and recover of the product,improve the environmental pollution,shorten processing periods and reduce production cost.Thus,the process is suitable for industrialization.
