Process for removing N-nitroso compounds from organo-amine compositions
including dinitroaniline herbicides
    2.
    发明授权
    Process for removing N-nitroso compounds from organo-amine compositions including dinitroaniline herbicides 有权
    从包括二硝基苯胺除草剂的有机胺组合物中除去N-亚硝基化合物的方法

    公开(公告)号:US06018079A

    公开(公告)日:2000-01-25

    申请号:US309133

    申请日:1999-05-10

    IPC分类号: C07C209/84 C07C211/52

    CPC分类号: C07C209/84

    摘要: A simple and inexpensive process is described for reducing the concentration of N-nitroso-containing compounds in compositions comprising N-nitroso-containing compounds and other desired compounds wherein the N-nitroso-containing compounds thermally decompose at a temperature below the decomposition temperature of the desired compounds. For compositions comprising dinitroaniline herbicides wherein the N-nitroso compound is a N-nitroso derivative of a precursor in the manufacture of the herbicide, for example Flumetralin, N-ethyl-N-(2-chloro-6-fluorobenzyl)-2,6-dinitro-4-trifluoromethylaniline, the process requires heating the mixture to a temperature greater than about 120.degree. C., and holding the composition at that temperature for a time effective to decompose the N-nitroso compound present in the mixture. Volatile decomposition products are advantageously removed from the composition.

    摘要翻译: 描述了一种简单且便宜的方法,用于降低含有N-亚硝基的化合物和其它所需化合物的组合物中含有N-亚硝基的化合物的浓度,其中N-亚硝基化合物在低于 所需化合物。 对于包含二硝基苯胺除草剂的组合物,其中N-亚硝基化合物是除草剂制备中的前体的N-亚硝基衍生物,例如氟草灵,N-乙基-N-(2-氯-6-氟苄基)-2,6 二硝基-4-三氟甲基苯胺,该方法需要将混合物加热至大于约120℃的温度,并将组合物在该温度下保持有效分解混合物中存在的N-亚硝基化合物。 挥发性分解产物有利地从组合物中除去。