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29 条记录 (耗时 0.021 秒)

    Separation of amides with molecular sieves
    5.
    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

    申请人： Ronald Pierantozzi ,  Mildred A. Miller ,  Mark L. Listemann ,  Thomas R. Gaffney ,  Charles G. Coe

    发明人： Ronald Pierantozzi ,  Mildred A. Miller ,  Mark L. Listemann ,  Thomas R. Gaffney ,  Charles G. Coe

    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。

    Bright annealing of stainless steels
    9.
    发明授权
    Bright annealing of stainless steels 失效
    明亮退火不锈钢

    公开(公告)号：US4744837A

    公开(公告)日：1988-05-17

    申请号：US002841

    申请日：1987-01-13

    申请人： James W. Brockington ,  Alejandro L. Cabrera ,  Charles G. Coe ,  John F. Kirner

    发明人： James W. Brockington ,  Alejandro L. Cabrera ,  Charles G. Coe ,  John F. Kirner

    IPC分类号： C21D1/76 ,  C21D6/00 ,  C21D1/74

    CPC分类号： C21D6/002 ,  C21D1/76

    摘要： A process for bright annealing of chromium containing alloys such as stainless steels in an atmosphere of nitrogen and hydrogen containing controlled additions of an inhibitor as described in U.S. Pat. No. 4,334,938 wherein at least one element provided at the surface of the article being annealed in an amount such that it is oxidized in preference to the chromium in said article, whereby nitrogen uptake is inhibited and dulling of the metal surface by formation of a film containing chromium oxide is avoided.

    摘要翻译： 在氮气和氢气气氛中对含铬合金如不锈钢进行光亮退火的方法，其含有受控添加的抑制剂，如美国专利No. 其中提供在制品表面处的至少一种元素被退火，其量使其优先于所述制品中的铬被氧化，由此通过形成膜来抑制氮吸收并使金属表面变钝 避免了含铬氧化铬。