申请人:Benckiser-Knapsack GmbH
公开号:US04098814A1
公开(公告)日:1978-07-04
Valuable and highly water soluble N-phosphono methylene mono- and di-amino alkane mono- and polyphosphonic acids which have not only an >N--CH.sub.2 --PO.sub.3 H.sub.2 group but also a C--PO.sub.3 H.sub.2 group in their molecule are produced by reacting amino alkane mono- or diphosphonic acids with formaldehyde and phosphorous acid or alkane nitriles with phosphorous acid, formaldehyde, and concentrated hydrochloric acid. The resulting phosphonic acid compounds are valuable sequestering agents forming complex compounds with bi- and polyvalent metal ions. They are useful for water softening even in substoichiometric amounts, in textile treatment baths, in the paper manufacture, in tanning baths, for the manufacture of liquid fertilizers, and for other purposes.
产生有价值且高度水溶性的N-膦甲基单和双氨基烷基单和多膦酸,它们的分子不仅有一个>N-CH.sub.2-PO.sub.3H.sub.2基团,还有一个C-PO.sub.3H.sub.2基团。这些化合物的制备方法是将氨基烷基单或双膦酸与甲醛和磷酸或烷基腈与磷酸、甲醛和浓盐酸反应。所得的膦酸化合物是有价值的络合剂,能与二价和多价金属离子形成复合物。它们在亚化学计量量下用于软化水,在纺织处理浴中、造纸制造中、鞣制浴中、液体肥料制造中以及其他用途中都很有用。