Removing aqueous ammonium sulfate from oxime product
    20.
    发明授权
    Removing aqueous ammonium sulfate from oxime product 失效
    从肟产物中除去硫酸铵

    公开(公告)号:US4256668A

    公开(公告)日:1981-03-17

    申请号:US50356

    申请日:1979-06-20

    CPC classification number: C07C323/47 C07C249/14 C07C2101/14

    Abstract: An organic, substantially water-insoluble oxime product is recovered from the liquid reaction mixture of water, ammonium sulfate and the oxime product. First the reaction mixture is separated into a first liquid layer containing an aqueous ammonium sulfate solution and a second liquid layer containing an emulsion of the oxime product as the continuous phase and aqueous ammonium sulfate as the discontinuous phase. These layers are separated and the second liquid layer is contacted with solid ammonium sulfate for a time sufficient to agglomerate the discontinuous phase. The agglomerated discontinuous phase is then removed from the continuous phase. Thereafter, either a lites fraction can be distilled from the continuous phase or the oxime product can be distilled from the continuous phase, or both. The process is particularly applicable to the production of oximes such as Aldicarb oxime, cyclohexanone oxime and methylethylketoxime from aqueous reaction mixtures in which by-product ammonium sulfate is formed.

    Abstract translation: 从水,硫酸铵和肟产物的液体反应混合物中回收有机的,基本上不溶于水的肟产物。 首先,将反应混合物分离成含有硫酸铵水溶液的第一液体层和含有作为连续相的肟产物的乳液的第二液体层和作为不连续相的硫酸铵水溶液。 分离这些层,第二液层与固体硫酸铵接触一段足以使不连续相结块的时间。 然后从连续相中除去聚集的不连续相。 此后,可以从连续相中蒸馏出lites馏分,或者可以从连续相或两者中蒸馏出肟产物。 该方法特别适用于由其中形成副产物硫酸铵的水性反应混合物生产肟类,如涕灭威肟,环己酮肟和甲基乙基酮肟。

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