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    • 8. 发明申请
    • A PROCESS AND EXTRACTANT COMPOSITION FOR EXTRACTING ACIDS
    • 用于提取酸的方法和提取物组合物
    • WO1995025081A1
    • 1995-09-21
    • PCT/GB1995000535
    • 1995-03-13
    • YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEMWHALLEY, KevinEYAL, Aharon, Meir
    • YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEMWHALLEY, Kevin
    • C07C51/48
    • C07C51/48
    • The invention provides a process for the recovery of a water-soluble carboxylic or mineral acid having a pKa higher than 2 from an aqueous feed solution containing the acid or a salt thereof, comprising extracting the acid with a water-immiscible extractant composition, the composition comprising: (a) at least one secondary or tertiary alkyl amine, in which the aggregate number of carbon atoms is at least 20, as a primary extractant; and (b) a sterically hindered, polar, organic compound having at least 5 carbon atoms, a basicity weaker than that of the primary extractant, and temperature-sensitive, extraction-modifying properties; separating the acid containing the extractant and subjecting it to a stripping operation at a temperature of at least 20 DEG C higher than the temperature at which the extraction is carried out, wherein the sterically hindered, polar, organic compound both modifies the extracting power of the primary extractant composition and facilitates the temperature-sensitive stripping operation. The invention also provides an extractant composition for use in such a process.
    • 本发明提供一种从含有酸或其盐的含水进料溶液中回收具有高于2的pKa的水溶性羧酸或无机酸的方法,包括用水不混溶的萃取剂组合物萃取酸,该组合物 包括:(a)至少一种其中总碳原子数为20以上的仲或叔烷基胺作为主要提取剂; 和(b)具有至少5个碳原子的空间位阻极性有机化合物,其碱性弱于初级萃取剂,碱度低于温度敏感性,萃取 - 改性性质; 分离含有萃取剂的酸,并在比进行萃取的温度高至少20℃的温度下进行汽提操作,其中空间位阻极性有机化合物改变了萃取剂的萃取力 初级萃取剂组合物,并有助于温度敏感的汽提操作。 本发明还提供了用于这种方法的萃取剂组合物。