维生素C母液回收工艺研究汇编.doc

维生素C母液回收工艺研究 崔凤霞1* ，王敬臣1，任蓓蕾2 （1.郑州拓洋实业有限公司技术中心，河南 郑州450066；2.河南蓓蕾环境工程有限公司，河南 郑州450003） 摘要： 以维生素C结晶母液为研究对象，用2-酮基-L-古龙酸盐反应生成维生素C盐和2-酮基-L-古龙酸盐，过滤分离得到2-酮基-L-古龙酸盐及析出2-酮基-L-古龙酸盐后的维生素C盐溶液2-酮基-L-古龙酸盐℃，析出时间为6.5h。在此条件下，2-酮基-L-古龙酸盐89.5%以上，维生素C总收率提高3％以上。 关键词： 维生素C；2-酮基-L-古龙酸 中图分类号：TQ 028 文献标识码：A Vitamin C liquor recovery process research CUI Feng-xia1*，WANG Jing-chen1，REN Bei-lei2 (1.Zhengzhou Tuoyang Industrial Co．，Ltd Technology Center，Zhengzhou 450066，China；2. Henan Beilei Environmental Engineering Co．，Ltd，Zhengzhou 450003，China) Abstract With vitamin C crystallization mother liquor as the research object, using 2 - keto-L-Gu salt recovery indicators as a measure of recovery process parameters. According to the characteristics of the mother liquor of vitamin C, and its reaction with a base salt of vitamin C, and 2 - keto-L-Gu salts, salts with different solubility of the solute differences separated by filtration to give 2 - keto-L-gulonic acid precipitated salts and 2 - keto-L-Gu acid sodium salt solution of vitamin C after. The proportion of a concentrated salt solution, the precipitation temperature, precipitation time of 2 - keto-L-Gu recovery of salts, precipitation conditions for the optimal ratio of 50% as a concentrate, precipitation temperature 15 ℃, precipitation time 6.5h. Under these conditions, 2 - keto-L-Gu salt recovery rate of 89.5% or more, vitamin C increased more than 3% overall yield, product quality and meet the standards, to bring high economic efficiency of industrial production, worth industrial production promotion. Key words vitamin C；2 - keto-L-gulonic acid；active ingredient；solubility；recycling technology 维生素C（Vitamin C ，Ascorbic Acid）又名L-抗坏血酸，化学名称为L-2,3, 5,6-四羟基-2-己烯酸-r-内酯，是人体营养所必需的一种水溶性维生素。人体由于缺少古洛内酯氧化酶自身不能生物合成维生素C，故必须从外界摄取维生素C。国内外维生素C生产均采用二步发酵法，法生产维生素C为我国首创，其实质是通过第二步大小菌混合发酵代替莱氏法中化学合成阶段。这样避免丙酮、酸、碱或苯等有机溶剂的使用，简化生产工艺，降低生产成本，使得生产安全性增强，原料单耗低。但是在结晶生产粗维生素C过程中产生大量维生素C母液。这些母液中既含有2-酮基-L-古龙酸和维生素C 种有用成分，也含有大量色素、有机杂酸等杂质，由于维生素C母液中各组分互相干扰，无法再结晶，如果直接排放，会