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    • 32. 发明授权
    • N-ethyl hydroxamic acid chelants
    • N-乙基异羟肟酸螯合剂
    • US5328626A
    • 1994-07-12
    • US890882
    • 1992-05-29
    • Bruce F. Monzyk
    • Bruce F. Monzyk
    • C07C259/06C09K3/00C22B3/26C22B3/32C21B3/00C22B3/00
    • C07C259/06C22B3/0024Y02P10/234
    • N-ethyl alkanohydroxamic acids, where said alkyl group is a straight chain alkyl group of 8 to 10 carbon atoms, or a branched alkyl group of 8 to 18 carbon atoms, provided said alkyl group is not cyclic, useful as metal chelants for use in organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted metal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentrations into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhibit rapid phase separation from aqueous solutions, good hydrolytic stability and resistance to forming emulsions.
    • 所述烷基为8〜10个碳原子的直链烷基或碳原子数为8〜18的支链烷基的N-乙基链烷酸异羟肟酸,只要所述烷基不是环状的,可用作金属螯合剂 有机溶剂萃取剂溶液如煤油,通过将提取的金属与N-乙基异羟肟酸形成络合物从水溶液中提取金属。 金属可以从较高浓度的N-乙基异羟肟酸的络合物中分离成低强度的酸剥离剂。 含N-乙基异羟肟酸的有机溶剂萃取溶液显示出与水溶液的快速相分离,良好的水解稳定性和抗成型乳液。