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    • 5. 发明授权
    • Process for the recovery of organic acids from aqueous solutions
    • 从水溶液中回收有机酸的方法
    • US06670505B1
    • 2003-12-30
    • US09519936
    • 2000-03-07
    • Nick Allen CollinsMark Robert SheltonGeorge William TindallSteven Thomas PerriRuairi Seosamh O'MeadhraChester Wayne SinkBhaskar Krishna ArumugamJohn Clark Hubbs
    • Nick Allen CollinsMark Robert SheltonGeorge William TindallSteven Thomas PerriRuairi Seosamh O'MeadhraChester Wayne SinkBhaskar Krishna ArumugamJohn Clark Hubbs
    • C07C5142
    • C07C51/43Y02P20/582Y10S435/803Y10S435/876Y10S435/896C07C59/347
    • A process for recovering a desired organic acid from a solution includes the steps of: providing an aqueous solution including at least one desired organic acid or its acid anion; adjusting the proton concentration in the aqueous solution to a desired level, with the desired proton concentration being selected, at least in part, by the amount of available protons needed to associate with the acid anions of the desired organic acid(s) to be recovered and/or acid anions that are weaker than the desired organic acids; and recovering at least a portion of the at least one desired organic acid from the aqueous phase. The desired proton concentration can be based on the amount of available protons being greater than, less than or substantially equal, to the amount of protons needed to associate with the anion of the desired organic acid(s) and acid anions that are weaker than the desired organic acid(s). Specific examples of suitable organic acids include, but are not limited to, ascorbic, succinic, tartaric, glyconic, gulonic, citric, lactic, hialic, maleic, acetic, formic, gluconic pyruvic, propionic, butyric, itaconic acids and mixtures thereof. One embodiment of the present invention relates to the recovery of 2-keto-L-gulonic acid (KLG) from aqueous solutions such as fermentation baths.
    • 从溶液中回收所需有机酸的方法包括以下步骤:提供包含至少一种所需有机酸或其酸阴离子的水溶液; 将所述水溶液中的质子浓度调节到所需的水平,其中所需质子浓度至少部分地被选择与需要回收的所需有机酸的酸性阴离子缔合所需的可用质子的量 和/或弱于所需有机酸的酸性阴离子; 以及从所述水相中回收所述至少一种所需有机酸的至少一部分。 期望的质子浓度可以基于可用质子的量大于,小于或基本上等于与所需有机酸的阴离子和酸阴离子相比所需的质子的量,其弱于 合适的有机酸的具体实例包括但不限于抗坏血酸,琥珀酸,酒石酸,葡萄糖酸,古洛糖酸,柠檬酸,乳酸,唾液酸,马来酸,乙酸,甲酸,葡萄糖酸,丙酸,丙酸,丁酸, 衣康酸及其混合物。 本发明的一个实施方案涉及从水溶液如发酵浴中回收2-酮-L-古洛糖酸(KLG)。