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    • 7. 发明授权
    • Hydroxyacetonitrile diphosphonic acid, a process for its production, and
its use
    • 羟基乙腈二膦酸,其生产过程及其用途
    • US4908138A
    • 1990-03-13
    • US223210
    • 1988-07-22
    • Helmut BlumSiglinde Hemmann
    • Helmut BlumSiglinde Hemmann
    • C02F5/00C02F5/08C02F5/10C02F5/12C02F5/14C07F9/38C09K3/00
    • C07F9/386C02F5/14
    • Hydroxyacetonitrile diphosphonic acid corresponding to the following general formula ##STR1## in which M represents H or a cation of a base, and salts thereof; to a process for their preparation comprising reacting 3-R.sup.1 -3-oxo-1-aminopropane-1,1-diphosphonic acids corresponding to the following general formula ##STR2## in which R.sup.1 is a tertiary substituted alkyl group, an optionally substituted cycloalkyl group or an optionally substituted aryl or heteroaryl radical, with nitrous acid, the secondary product R.sup.1 -COOH and unreacted starting material are separated off from the reaction mixture and the hydroxyacetonitrile diphosphonic acid is obtained in the form of a salt by addition of a base; and to the use of the above compounds as complexing agents and as thresholders.
    • 对应于下列通式(III)的羟基乙腈二膦酸,其中M表示H或碱的阳离子及其盐; 涉及其制备方法,其包括使对应于下列通式(IV)的3-R1-3-氧代-1-氨基丙烷-1,1-二膦酸反应其中R 1为叔取代的烷基,任选地 取代的环烷基或任选取代的芳基或杂芳基与亚硝酸反应,将次级产物R1-COOH和未反应的起始物质从反应混合物中分离出来,并通过加入一种盐形式获得盐形式的羟基乙腈二膦酸 基础; 以及上述化合物作为络合剂和阈值剂的用途。