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    • 2. 发明授权
    • Process for preparing dialkylphosphinic acids and their salts
    • 制备二烷基次膦酸及其盐的方法
    • US06359171B1
    • 2002-03-19
    • US09577463
    • 2000-05-24
    • Norbert WeferlingMartin SickenGünter KolbeHans-Peter Schmitz
    • Norbert WeferlingMartin SickenGünter KolbeHans-Peter Schmitz
    • C07F930
    • C07F9/48C07F9/30
    • The invention relates to a process for the preparation of dialkylphosphinic acids and salts thereof, which comprises a) reacting elemental yellow phosphorus with alkylating agents in the presence of a base to give a mixture which comprises, as principal constituents, the (metal) salts of alkylphosphonous, phosphorous and hypophosphorous acids, b) esterifying the principal constituents of the mixture from a) to give an ester mixture, c) isolating the ester of the alkylphosphonous acid from the ester mixture, d) preparing the corresponding ester of the dialkylphosphinic acid from the ester of the alkylphosphonous acid by free-radical-initiated reaction with olefins, e) converting the ester of the dialkylphosphinic acid into the free acid or into the dialkylphosphinic acid salts of metals from groups IA, IIA, IIIA, IVA, VA, IIB, IVB, VIIB or VIIIB of the Periodic Table or of cerium. The invention likewise relates to the use of the dialkylphosphinic acids/salts prepared by this process for the preparation of various products, in particular flame retardants.
    • 本发明涉及一种制备二烷基次膦酸及其盐的方法,该方法包括:a)在碱存在下使元素黄磷与烷基化剂反应得到一种混合物,该混合物包含作为主要成分的烷基磷酸的(金属)盐 ,磷和次磷酸,b)从a)酯化混合物的主要成分得到酯混合物,c)从酯混合物中分离出烷基亚磷酸的酯,d)从相应的二烷基次膦酸的酯 通过与烯烃的自由基引发的反应,烷基亚磷酸的酯,e)将二烷基次膦酸的酯转化为游离酸或转化成IA,IIA,IIIA,IVA,VA,IIB族的金属的二烷基次膦酸盐, 周期表IVB,VIIB或VIIIB或铈。本发明同样涉及通过该方法制备的二烷基次膦酸/盐在p 各种产品的修补,特别是阻燃剂。
    • 5. 发明授权
    • Processing for preparing salts of dialkylphosphinic acids
    • 加工制备二烷基次膦酸的盐
    • US06355832B1
    • 2002-03-12
    • US09610953
    • 2000-03-10
    • Norbert WeferlingHans-Peter SchmitzGünter Kolbe
    • Norbert WeferlingHans-Peter SchmitzGünter Kolbe
    • C07F930
    • C07F9/30
    • The invention relates to a process for preparing salts of dialkylphosphinic acids, which comprises a) reacting alkylphosphonous and/or hypophosphorous acid and/or alkali metal salts thereof with olefins in the presence of a free-radical initiator to give dialkylphosphinic acids and/or alkali metal salts thereof and b) reacting the dialkylphosphinic acids and/or alkali metal salts thereof obtained according to a) with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and/or K to give the metal dialkylphosphinate salts. The invention likewise relates to the use of the metal dialkylphosphinate salts prepared by the process according to the invention for preparing flame retardants.
    • 本发明涉及一种制备二烷基次膦酸的盐的方法,该方法包括:a)在自由基引发剂存在下,使烷基亚磷酸和/或次磷酸和/或其碱金属盐与烯烃反应,得到二烷基次膦酸和/或碱金属 其盐和b)使根据a)获得的二烷基次膦酸和/或其碱金属盐与Mg,Ca,Al,Sb,Sn,Ge,Ti,Zn,Fe,Zr,Ce,Bi,Sr, Mn,Li,Na和/或K,得到二烷基次膦酸金属盐。 本发明同样涉及通过本发明方法制备的二烷基次膦酸金属盐用于制备阻燃剂的用途。