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    Process for the preparation of 2-chloroacrylonitrile
    2.
    发明授权
    Process for the preparation of 2-chloroacrylonitrile 失效
    制备2-氯丙烯腈的方法

    公开(公告)号：US5679826A

    公开(公告)日：1997-10-21

    申请号：US735717

    申请日：1996-10-23

    申请人： Franz-Josef Mais ,  Thomas Essert ,  Helmut Fiege ,  Friedrich Durholz ,  Guido Steffan

    发明人： Franz-Josef Mais ,  Thomas Essert ,  Helmut Fiege ,  Friedrich Durholz ,  Guido Steffan

    IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C253/30 ,  C07C255/10

    CPC分类号： C07C253/30

    摘要： 2-Chloroacrylonitrile is prepared in a particularly advantageous and readily industrially practicable manner by chlorinating acrylonitrile and then thermally cleaving the 2,3-diehloropropionitrile formed, by chlorinating acrylonitrile in the presence of a catalyst system comprising dimethylformamide and pyridine and/or pyridine derivatives and subjecting the resulting crude 2,3-dichloropropionitrile to thermal cleavage in the presence of the same catalyst system without the addition of further catalysts.

    摘要翻译： 通过氯化丙烯腈，然后在包含二甲基甲酰胺和吡啶和/或吡啶衍生物的催化剂体系存在下，通过氯化丙烯腈热分解形成的2,3-二氯丙腈，制备2-氯丙烯腈， 所得粗制的2,3-二氯丙腈在相同的催化剂体系的存在下进行热裂解而不加入另外的催化剂。

    Measuring Transducer for Process Instrumentation, and Method for Monitoring the Condition of the Sensor Thereof
    4.
    发明申请
    Measuring Transducer for Process Instrumentation, and Method for Monitoring the Condition of the Sensor Thereof 审中-公开
    测量传感器用于过程仪表，以及监测传感器状态的方法

    公开(公告)号：US20110037456A1

    公开(公告)日：2011-02-17

    申请号：US12988766

    申请日：2009-04-24

    申请人： Eric Chemisky ,  Thomas Essert ,  Delphine Meunier ,  Robin Pramanik ,  Martin Spatz

    发明人： Eric Chemisky ,  Thomas Essert ,  Delphine Meunier ,  Robin Pramanik ,  Martin Spatz

    IPC分类号： G01R21/14 ,  G01R19/00

    CPC分类号： G01D18/00 ,  G01D3/0365 ,  G01D11/245 ,  G01L9/065 ,  G01L27/007

    摘要： A measuring transducer for process instrumentation that comprises a sensor for sensing a physical or chemical variable, wherein the sensor includes at least one electrical element embedded in a substrate comprising semiconducting material and is electrically separated therefrom by a blocked PN junction during normal operation. In order to monitor the condition of the sensor, the PN junction is connected in the conducting direction in a test mode, and the electrical property of the PN junction, i.e., the forward voltage, is determined and used to monitor the sensor condition. Additionally, a temperature sensor mounted on the sensor can be monitored by determining, based on the dependence of the forward voltage on the temperature, a comparative value for the temperature sensed by the temperature sensor. If major differences occur, a conclusion can be reached that there is a failure of the sensor, and a corresponding error message can be output over a field bus.

    摘要翻译： 一种用于过程仪表的测量传感器，其包括用于感测物理或化学变量的传感器，其中所述传感器包括嵌入在包括半导体材料的衬底中的至少一个电气元件，并且在正常操作期间通过阻塞的PN结与其电分离。 为了监测传感器的状态，PN接头在测试模式下以导通方向连接，并且确定PN结的电气特性，即正向电压，并用于监测传感器状态。 此外，可以通过基于正向电压对温度的依赖性来确定由温度传感器感测的温度的比较值来监测安装在传感器上的温度传感器。 如果出现重大差异，可以得出传感器故障的结论，并且可以通过现场总线输出相应的错误信息。