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    Conversion of ketoximes into lactams in organic sulfoxide solvents
    61.
    发明授权
    Conversion of ketoximes into lactams in organic sulfoxide solvents 失效
    将酮肟转化为有机亚砜溶剂中的内酰胺

    公开(公告)号：US3944542A

    公开(公告)日：1976-03-16

    申请号：US413435

    申请日：1973-11-07

    Applicant: Abraham H. de Rooij ,  Jan Elmendorp ,  Willem J. Wassen

    Inventor： Abraham H. de Rooij ,  Jan Elmendorp ,  Willem J. Wassen

    IPC: C07D201/04

    CPC classification number: C07D201/04

    Abstract: Organic sulfoxides such as dimethylsulfoxide are used in the transformation of alicyclic ketoximes into the corresponding lactams according to the Beckmann rearrangement in the presence of a strong acid cation exchange resin as disclosed. Thus cyclohexanone is dissolved in DMSO and contacted with a sulfonated copolymer of styrene and divinyl benzene to produce caprolactam in a continuous process.

    Abstract translation: 在公开的强酸阳离子交换树脂的存在下，有机亚砜如二甲亚砜用于将脂环酮肟转化成相应的内酰胺，根据Beckmann重排。 因此将环己酮溶解在DMSO中并与苯乙烯和二乙烯基苯的磺化共聚物接触以在连续方法中制备己内酰胺。

    Process for the preparation of lactams
    62.
    发明授权
    Process for the preparation of lactams 失效
    制备内酰胺的方法

    公开(公告)号：US3914217A

    公开(公告)日：1975-10-21

    申请号：US52330374

    申请日：1974-11-13

    Applicant: ALLIED CHEM

    Inventor： SMITH JOSEPH A

    IPC: C07D201/04

    CPC classification number: C07D201/04

    Abstract: This invention relates to a process for the production of lactams by catalytic rearrangement of cycloketoximes in the presence of oleum. More specifically the invention relates to improving yields of lactam while reducing undesirable by-product formation by use of three stages of rearrangement with correlated adjustment of reaction conditions in each stage. Critical variables in each stage include acid concentration, free SO3 concentration, percent oxime added, reaction temperature and extent of mixing. Normally, the oxime fed to the process contains up to 6 percent water.

    Abstract translation: 本发明涉及在发烟硫酸存在下通过环酮肟催化重排生产内酰胺的方法。 更具体地，本发明涉及通过使用三个阶段的重排与各阶段中的反应条件的相关调整来提高内酰胺的产率，同时减少不期望的副产物形成。 每个阶段的关键变量包括酸浓度，游离SO3浓度，加入的肟百分比，反应温度和混合程度。 通常，喂给该方法的肟含有高达6％的水。

    Process for recovery of lactam
    63.
    发明授权
    Process for recovery of lactam 失效
    回收内酰胺的方法

    公开(公告)号：US3879380A

    公开(公告)日：1975-04-22

    申请号：US31363872

    申请日：1972-12-11

    Applicant: STAMICARBON

    Inventor： DE ROOIJ ABRAHAM H ,  GOETTSCH REIJER

    IPC: B01D11/04 ,  B01D9/02 ,  C07D201/04 ,  C07D201/16 ,  C07D41/06

    CPC classification number: C07D201/16 ,  C07D201/04

    Abstract: A process for recovering lactams from a mixture of one or more lactams and sulphuric acid is disclosed, wherein the sulphuric acid is neutralized with ammonia or an ammonium salt to ammonium hydrogen sulfate in the presence of a lactam solvent. The neutralization produces a melt of ammonium hydrogen sulfate and a solution of lactam in the organic solvent, and the melt is readily separated from the solution. The lactam can then be recovered from the organic solvent. The process allows the lactam to be recovered in good yield without producing, as by-product, ammonium sulfate.

    Abstract translation: 公开了一种从一种或多种内酰胺和硫酸的混合物中回收内酰胺的方法，其中硫酸在内酰胺溶剂存在下用氨或铵盐中和至硫酸氢铵。 中和产生硫酸氢铵的熔体和内酰胺在有机溶剂中的溶液，并且熔体容易从溶液中分离出来。 然后可以从有机溶剂中回收内酰胺。

    Process for preparing and recovering lactams
    64.
    发明授权
    Process for preparing and recovering lactams 失效
    制备和回收乳液的方法

    公开(公告)号：US3852273A

    公开(公告)日：1974-12-03

    申请号：US24972772

    申请日：1972-05-02

    Applicant: STAMICARBON

    Inventor： DE ROOIJ A H

    IPC: C07D201/04 ,  C07D201/16 ,  C07D41/06

    CPC classification number: C07D201/16 ,  C07D201/04

    Abstract: A process for preparing and recovering lactams by the so-called Beckmann rearrangement of the corresponding ketoximes in a sulfuric acid medium is disclosed, wherein the mixture of lactam and sulfuric acid medium obtained from the Beckmann rearrangement is mixed with an aqueous solution of ammonium sulfate obtained as a by-product in the synthesis of hydroxylammonium sulfate in the preparation of said ketoximes. The lactam is then extracted from the resulting less acidic solution and the remaining acid solution, comprising an aqueous solution of ammonium hydrogen sulfate, is thermally decomposed to produce recoverable sulphur dioxide. The process of this invention can be used in the production of lactams while avoiding the production of ammonium sulfate byproduct.

    Abstract translation: 公开了通过在硫酸介质中相应酮肟的所谓贝克曼重排制备和回收内酰胺的方法，其中将从贝克曼重排得到的内酰胺和硫酸介质的混合物与得到的硫酸铵水溶液混合 作为在制备所述酮肟时合成羟基硫酸铵的副产物。 然后从所得的较少酸性溶液中提取内酰胺，并将包含硫酸氢铵水溶液的剩余酸溶液热分解以产生可回收的二氧化硫。

    Detector for detecting objects moving through a magnetic field established between coils of an l-c oscillator
    67.
    发明授权
    Detector for detecting objects moving through a magnetic field established between coils of an l-c oscillator 失效
    用于检测物体通过在L-C振荡器的线圈之间建立的磁场进行移动的检测器

    公开(公告)号：US3723862A

    公开(公告)日：1973-03-27

    申请号：US3723862D

    申请日：1971-04-05

    Applicant: SIEMENS AG

    Inventor： WENTZEL P ,  SCHULZE E

    IPC: C07D201/04 ,  H03K17/14 ,  H03K17/95 ,  G01R33/00

    CPC classification number: H03K17/9547 ,  C07D201/04 ,  H03K17/14

    Abstract: A detector for detecting objects as they move through a magnetic field established between a transmitter coil connected to an electrical supply and a receiver coil spaced from and magnetically coupled to the transmitter coil. The receiver coil, together with a capacitor, form the oscillatory circuit of an amplifier to provide an oscillator which oscillates to provide a high amplitude output signal in response to alteration of the magnetic field due to an object passing therethrough. The oscillator is provided with three feedback networks including one feedback network which functions as a source of alternating current which causes the oscillator to provide the low amplitude output signal. The oscillatory circuit includes a resistor for providing a highly damped operation which supports the effect of the first mentioned feedback circuit. A second feedback circuit provides constant amplification and a third feedback circuit includes the transmitter and receiver coils for effecting the regenerative function for oscillation.

    Abstract translation: 一种检测器，用于当物体移动通过建立在连接到电源的发射器​​线圈与与发射器线圈间隔开并且磁耦合到发射器线圈的接收器线圈之间的磁场时进行检测。 接收器线圈与电容器一起形成放大器的振荡电路，以提供振荡器，振荡器响应由于物体通过的磁场的变化而提供高幅度输出信号。 振荡器具有三个反馈网络，其中包括一个反馈网络，其作为交流电源，其使振荡器提供低振幅输出信号。 振荡电路包括用于提供高阻尼操作的电阻器，其支持第一提及的反馈电路的效果。 第二反馈电路提供恒定的放大，并且第三反馈电路包括用于实现振荡的再生功能的发射器和接收器线圈。

    Production of epsilon-caprolactam
    68.
    发明授权
    Production of epsilon-caprolactam 失效
    生产EPSILON-CAPROLACTAM

    公开(公告)号：US3652549A

    公开(公告)日：1972-03-28

    申请号：US3652549D

    申请日：1968-07-18

    Applicant: KANEGAFUCHI SPINNING CO LTD

    Inventor： FUJITA ISAMU ,  OTOI KIYOSHI ,  IKEDA ISHIBACHI

    IPC: C07D201/04 ,  C07D41/06

    CPC classification number: C07D201/04

    Abstract: E-CAPROLACTAM, USEFUL AS A RAW MATERIAL IN THE MANUFACTURE OF NYLON, IS PREPARED BY THE GASEOUS CATALYTIC REACTION OF AT LEAST ONE COMPOUND OF THE FORMULA

    X-(CH2)4COY

    WHEREIN X IS -CH2OH, -CHO, -(CH(OR)(OR''), -COOH, -COONH4, -CONH2 OR COOR'', Y IS -OH, -ONH4, -NH2 OR -OR"'' AND EACH OF R, R'', R" AND R"'' IS METHYL, ETHYL PROPYL, BUTYL OR CYCLOHEXYL, WITH AMMONIA, HYDROGEN AND/OR STREAM IN THE PRESENCE OF A COPPER-CHROMITE CATALYST.

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