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公开(公告)号：US5034105A
公开(公告)日：1991-07-23
申请号：US385638
申请日：1989-07-27
摘要： A process for preparing a carboxylic acid of high purity comprises preparing an undersaturated solution of a salt of the carboxylic acid; subjecting the undersaturated salt solution to water-splitting electrodialysis to form base and a supersaturated solution of the carboxylic acid; and, then crystallizing the carboxylic acid from the supersaturated solution. In the preferred embodiment, the undersaturated solution is a fermentation broth containing sodium succinate and the carboxylic acid obtained is succinic acid.
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2.发明授权Process for the recovery of lactic acid from aqueous lactate salt solutions, involving the use of ion exchangers 失效涉及使用离子交换剂从乳酸盐水溶液中回收乳酸的方法公开(公告)号：US07238837B1
公开(公告)日：2007-07-03
申请号：US09147914
申请日：1997-10-02
摘要： The invention provides a process for the recovery of lactic acid from aqueous solutions containing at least one water-soluble lactate salt and having a pH of about between 4 and 14, comprising the steps of: contacting said aqueous solution with a cation exchanger which is at least partially in its acid form, said cation exchanger being water immiscible in both acid and salt form, whereby ion exchange is effected, protons are transferred from the cation exchanger to the aqueous solution to acidulate it and to form lactic acid therein and cations from the aqueous solution are bound by the cation exchanger; reacting the cations carrying cation exchanger to convert it into a cation exchanger which is at least partially in its acid form and to a second product, which second product is basic and comprises the cation of the salt; and recovering lactic acid from the lactic acid-containing acidulated aqueous solution by methods known per se.
摘要翻译： 本发明提供从含有至少一种水溶性乳酸盐的水溶液中回收乳酸并具有约4至14的pH的方法，包括以下步骤：使所述水溶液与阳离子交换剂接触，所述阳离子交换剂在 所述阳离子交换剂是酸和盐形式的水不混溶，由此进行离子交换，质子从阳离子交换剂转移到水溶液中以酸化并在其中形成阳离子 水溶液由阳离子交换剂结合; 使阳离子携带阳离子交换剂反应以将其转化为至少部分为其酸形式的阳离子交换剂和第二产物，该第二产物是碱性的并且包含盐的阳离子; 并通过本身已知的方法从含乳酸的酸化水溶液中回收乳酸。
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公开(公告)号：US5525365A
公开(公告)日：1996-06-11
申请号：US362762
申请日：1994-12-22
摘要： A method for processing food, and particularly fruit, wherein the leaching discharge stream is separated, for example by desalting electrodialysis, into reusable brine and residual solutions. First, the fruit is brined using conventional techniques. The fruit is then leached or flushed with water to reduce the concentration of brine materials. The discharge stream from the leaching process is separated into a sugar solution and a brine solution, preferably through desalting electrodialysis. The dilute sugar solution is returned to the leaching process to return the natural sugar and color to the fruit. The brine solution preferably is returned to the brining process.
摘要翻译： 一种用于处理食物，特别是水果的方法，其中将浸出排出物流例如通过脱盐电渗析分离成可再利用的盐水和残余溶液。 首先，水果采用常规技术。 然后将水果浸出或用水冲洗以减少盐水物质的浓度。 来自浸出过程的排出流被分离成糖溶液和盐水溶液，优选通过脱盐电渗析。 稀释的糖溶液返回到浸出过程，以将天然糖和颜色返回到水果中。 盐水溶液优选地返回到烧制过程。
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