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24 条记录 (耗时 0.027 秒)

    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

    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。

    Preparation of N-(1-alkoxyalkyl)formamide and bis formamides
    6.
    发明授权
    Preparation of N-(1-alkoxyalkyl)formamide and bis formamides 失效
    制备N-（1-烷氧基烷基）甲酰胺和双甲酰胺

    公开(公告)号：US5117056A

    公开(公告)日：1992-05-26

    申请号：US631597

    申请日：1990-12-21

    申请人： Mark L. Listemann ,  Robert K. Pinschmidt, Jr.

    发明人： Mark L. Listemann ,  Robert K. Pinschmidt, Jr.

    IPC分类号： C07C231/12 ,  C07B61/00 ,  C07C231/08 ,  C07C233/03 ,  C07C233/17 ,  C07C233/18 ,  C07C233/36 ,  C07C235/08

    CPC分类号： C07C231/08 ,  Y02P20/582

    摘要： This invention relates to an improved process for the formation of N-(1-alkoxyalkyl)amides with coproduction of alkylidene bisamides. The N-(1-alkoxyalkyl)formamides of this invention are prepared by reacting formamide with an acetal or hemiacetal carboxylate ester represented by the formulas: ##STR1## wherein R is C.sub.1 -C.sub.8 alkyl, aralkyl or aryl; R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl, or aryl; and R.sub.3 is secondary or tertiary alkyl having from 3-8 carbon atoms.The reaction is carried out in the presence of an acid catalyst such as a strong acid ion exchange resin.

    摘要翻译： 本发明涉及通过共生产亚烷基双酰胺形成N-（1-烷氧基烷基）酰胺的改进方法。 本发明的N-（1-烷氧基烷基）甲酰胺通过使甲酰胺与下式表示的缩醛或半缩醛羧酸酯反应来制备：其中R是C 1 -C 8烷基，芳烷基或芳基; R1和R2是C1-C8烷基或芳基; 并且R 3是具有3-8个碳原子的仲或叔烷基。 反应在酸催化剂如强酸离子交换树脂存在下进行。

    Preparation of metallated and substituted alkynes
    10.
    发明授权
    Preparation of metallated and substituted alkynes 失效
    金属化和取代炔烃的制备

    公开(公告)号：US5162562A

    公开(公告)日：1992-11-10

    申请号：US697867

    申请日：1991-05-09

    申请人： Frederick L. Herman ,  Ann C. L. Savoca ,  Mark L. Listemann

    发明人： Frederick L. Herman ,  Ann C. L. Savoca ,  Mark L. Listemann

    IPC分类号： C07F1/04 ,  C07F7/08 ,  C07F7/30

    CPC分类号： C07F1/04 ,  C07F7/0801 ,  C07F7/0827 ,  C07F7/30

    摘要： A process is provided for making metallated and substituted alkynes from feedstocks which include alkadienes containing allenic unsaturation or such alkadienes in a mixture with alkynes having either internal or terminal unsaturation, such as a mixture of propadiene and propyne. This reaction involves an initial step in which the allenic hydrocarbon and any internal alkyne is isomerized and simultaneously the resultant terminal alkynes are metallated with an alkali metal. The reaction is carried out at relatively low temperatures in a suitable inert solvent such as diethylether. When metallation is complete the reaction mixture can be contacted directly with any suitable electrophile, such as a halo silane, for example, chlorotrimethylsilane, and the alkali metal on the terminal alkyne is replaced with the desired substituent. The products thus formed are useful as monomers for preparing polymers having a variety of properties, for example, as asymmetric membranes for gas separation.

    摘要翻译： 提供了一种用于从原料制备金属化和取代的炔烃的方法，其包括含有不饱和烯烃的链烯二烯或与具有内部或末端不饱和键（例如丙二烯和丙炔的混合物）的炔烃的混合物。 该反应包括初步步骤，其中烯烃和任何内炔异构化，同时所得的末端炔烃用碱金属进行金属化。 该反应在相当低的温度下在合适的惰性溶剂如二乙醚中进行。 当金属化完成时，反应混合物可以与任何合适的亲电试剂例如卤代硅烷（例如氯代三甲基硅烷）直接接触，并且末端炔上的碱金属被所需的取代基取代。 由此形成的产物可用作制备具有各种性质的聚合物的单体，例如用作气体分离的不对称膜。