A method of extracting taurine from a mactra chinensis water decoction

大黄蚬水煮液提取牛磺酸的方法

Abstract

本发明是一种大黄蚬水煮液提取牛磺酸的方法,收集大黄蚬水煮液,减压浓缩,浓缩;浓缩液加入酸调节,经离心分离得上清液;在上清液中加入碱调节,静置,离心分离得上清液;将上清液进行超滤,收集滤过液;滤过液采用电渗析法脱盐;脱盐后液体经减压浓缩,加入乙醇,静置,离心收集沉淀,沉淀加入水完全溶解后,再加入乙醇,进行重结晶;进行再次重结晶得到牛磺酸纯品。本发明最显著的特点是不利用阳离子交换树脂进行脱盐纯化,先利用膜技术除杂,再采用电渗析法脱盐,最后利用重结晶制得牛磺酸纯品,该技术方法提取分离的牛磺酸纯度达95%以上,操作简单,自动化程度高,对环境无污染,所得产品可作为营养强化剂使用。
The invention relates to a method of extracting taurine from a mactra chinensis water decoction. The method includes collecting the mactra chinensis water decoction, concentrating under vacuum, concentrating, adding an acid into the concentrate for adjustment, performing centrifugal separation to obtain liquid supernatant, adding an alkali into the liquid supernatant for adjustment, allowing the mixture to stand, performing centrifugal separation to obtain liquid supernatant, subjecting the liquid supernatant to ultrafiltration, collecting a filtrate, desalting the filtrate by adoption of an electrodialysis process, subjecting the liquid obtained after desalting to concentration under vacuum, adding ethanol, allowing the mixture to stand, centrifuging to collect a precipitate, adding water into the precipitate to fully dissolve the precipitate, adding ethanol, recrystallizing, and recrystallizing again to obtain a pure taurine product. The method is characterized in that the cation exchange resin is not utilized for desalting purification; a membrane technique is utilized to remove impurities firstly, then the electrodialysis process is adopted to desalt, and finally recrystallization is utilized to obtain the pure taurine product; purity of the taurine extracted and separated by the method is higher than 95%; the method is simple in operation, high in automatic degree and free of pollution to the environment; and the obtained product can be used as a nutrient supplement.

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