Separation of amides with molecular sieves
    1.
    发明授权
    Separation of amides with molecular sieves 失效
    用分子筛分离酰胺

    公开(公告)号:US4996322A

    公开(公告)日:1991-02-26

    申请号:US351987

    申请日:1989-05-15

    IPC分类号: C07C231/24

    CPC分类号: C07C231/24

    摘要: Amides having different molecular kinetic diameters or heats of adsorption, such as formamide and N-(1-alkoxyethyl)formamide, are separated under mild conditions with a molecular sieve which selectively adsorbs one of the amides, such as formamide. N-vinylformamide can be purified by removing formamide remaining in synthesis process streams using this technique. The adsorbed amide can be desorbed by heating the molecular sieve in either inert or reactive atmospheres. Preferred molecular sieves include the zeolites of types A, X, Y, molecular sieves of the MFI topology, chabazite, and mordenite. Calcium chabazite is particularly versatile and effective.

    摘要翻译: 具有不同分子动力学直径或吸附热的酰胺如甲酰胺和N-(1-烷氧基乙基)甲酰胺在温和条件下用选择性吸附一种酰胺如甲酰胺的分子筛分离。 可以使用该技术通过除去残留在合成工艺流中的甲酰胺来纯化N-乙烯基甲酰胺。 吸附的酰胺可以通过在惰性或反应性气氛中加热分子筛来解吸。 优选的分子筛包括MFI拓扑结构类型A,X,Y,分子筛的沸石,菱沸石和丝光沸石。 钙菱沸石是特别多功能和有效的。