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    Process for the preparation of isocyanates in the gas phase
    5.
    发明授权
    Process for the preparation of isocyanates in the gas phase 有权
    在气相中制备异氰酸酯的方法

    公开(公告)号：US09024057B2

    公开(公告)日：2015-05-05

    申请号：US12632117

    申请日：2009-12-07

    申请人： Klaus Biskup ,  Rainer Bruns ,  Wolfgang Lorenz ,  Fritz Pohl ,  Friedhelm Steffens ,  Volker Michele

    发明人： Klaus Biskup ,  Rainer Bruns ,  Wolfgang Lorenz ,  Fritz Pohl ,  Friedhelm Steffens ,  Volker Michele

    IPC分类号： C07C263/00 ,  C07C263/10

    CPC分类号： C07C263/10 ,  C07C265/14

    摘要： Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the boiling temperature of the amine(s) in a reactor having a reaction space which is essentially rotationally symmetric to the direction of flow. The flow fate, averaged over the cross-section, of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is between 4 and 80% is not more than 8 m/sec. The flow rate averaged over the cross-section of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is 4 to 80% is always below the flow rate averaged over the cross-section at the start of this section.

    摘要翻译： 通过一种或多种芳族伯胺与气相中的光气反应制备芳族异氰酸酯。 光气和伯芳基胺在具有反应空间的反应器中在高于胺的沸点温度的温度下反应，反应空间基本上与流动方向旋转对称。 反应混合物沿着反应空间部分中基本上旋转对称的反应空间轴线的横截面平均流动，其中胺基转化为异氰酸酯基的反应空间为4-80％ 不超过8米/秒。 反应混合物的横截面上的平均流量在反应空间的基本上旋转对称的反应空间的轴上，其中胺基转化为异氰酸酯基团的部分总是低于 在本节开头的横截面上平均流量。

    PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE
    6.
    发明申请
    PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE 有权
    在气相中制备异氰酸酯的方法

    公开(公告)号：US20100152484A1

    公开(公告)日：2010-06-17

    申请号：US12632117

    申请日：2009-12-07

    申请人： Klaus Biskup ,  Rainer Bruns ,  Wolfgang Lorenz ,  Fritz Pohl ,  Friedhelm Steffens ,  Volker Michele

    发明人： Klaus Biskup ,  Rainer Bruns ,  Wolfgang Lorenz ,  Fritz Pohl ,  Friedhelm Steffens ,  Volker Michele

    IPC分类号： C07C263/10

    CPC分类号： C07C263/10 ,  C07C265/14

    摘要： Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the boiling temperature of the amine(s) in a reactor having a reaction space which is essentially rotationally symmetric to the direction of flow. The flow fate, averaged over the cross-section, of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is between 4 and 80 % is not more than 8 m/sec. The flow rate averaged over the cross-section of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is 4 to 80 % is always below the flow rate averaged over the cross-section at the start of this section.

    摘要翻译： 通过一种或多种芳族伯胺与气相中的光气反应制备芳族异氰酸酯。 光气和伯芳基胺在具有反应空间的反应器中在高于胺的沸点温度的温度下反应，反应空间基本上与流动方向旋转对称。 反应混合物沿着反应空间部分中基本上旋转对称的反应空间轴线的横截面平均流动，其中胺基转化为异氰酸酯基的反应空间为4-80％ 不超过8米/秒。 反应混合物的横截面上的平均流量在反应空间的基本上旋转对称的反应空间的轴上，其中胺基转化为异氰酸酯基团的部分总是低于 在本节开头的横截面上平均流量。

    PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE
    7.
    发明申请
    PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE 失效
    过氧化二异氰酸酯的制备方法

    公开(公告)号：US20110021811A1

    公开(公告)日：2011-01-27

    申请号：US12894290

    申请日：2010-09-30

    申请人： Wolfgang Lorenz ,  Lars Padeken ,  Bernd Pennemann ,  Friedhelm Steffens ,  Lothar Weismantel

    发明人： Wolfgang Lorenz ,  Lars Padeken ,  Bernd Pennemann ,  Friedhelm Steffens ,  Lothar Weismantel

    IPC分类号： C07C263/10

    CPC分类号： C07C263/10 ,  C07C209/62 ,  C07C265/14 ,  C07C211/51

    摘要： The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude toluene-diisocyanate is purified by distillation, the distillation residue formed during the distillation is hydrolysed at temperatures of less than 230° C. under absolute pressures of less than 30 bar, and the toluenediamine formed by this process is subsequently recycled into the reaction of toluenediamine and phosgene.

    摘要翻译： 本发明涉及一种制备甲苯二异氰酸酯的方法。 在该方法中，甲苯二胺与光气反应得到粗甲苯二异氰酸酯，通过蒸馏纯化粗甲苯二异氰酸酯，蒸馏期间形成的蒸馏残余物在小于230℃的温度下在绝对压力小于 30巴，通过该方法形成的甲苯二胺随后再循环到甲苯二胺和光气的反应中。

    Process for the preparation of toluene-diisocyanate
    8.
    发明申请
    Process for the preparation of toluene-diisocyanate 审中-公开
    制备甲苯二异氰酸酯的方法

    公开(公告)号：US20080146835A1

    公开(公告)日：2008-06-19

    申请号：US12001905

    申请日：2007-12-13

    申请人： Wolfgang Lorenz ,  Lars Padeken ,  Bernd Pennemann ,  Friedhelm Steffens ,  Lothar Weismantel

    发明人： Wolfgang Lorenz ,  Lars Padeken ,  Bernd Pennemann ,  Friedhelm Steffens ,  Lothar Weismantel

    IPC分类号： C07C263/10

    CPC分类号： C07C263/10 ,  C07C209/62 ,  C07C265/14 ,  C07C211/51

    摘要： The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude toluene-diisocyanate is purified by distillation, the distillation residue formed during the distillation is hydrolysed at temperatures of less than 230° C. under absolute pressures of less than 30 bar, and the toluenediamine formed by this process is subsequently recycled into the reaction of toluenediamine and phosgene.

    摘要翻译： 本发明涉及一种制备甲苯二异氰酸酯的方法。 在该方法中，甲苯二胺与光气反应得到粗甲苯二异氰酸酯，通过蒸馏纯化粗甲苯二异氰酸酯，蒸馏期间形成的蒸馏残余物在小于230℃的温度下在绝对压力小于 30巴，通过该方法形成的甲苯二胺随后再循环到甲苯二胺和光气的反应中。

    Process for the production of dinitrotoluene
    10.
    发明申请
    Process for the production of dinitrotoluene 失效
    生产二硝基甲苯的方法

    公开(公告)号：US20080086017A1

    公开(公告)日：2008-04-10

    申请号：US11827502

    申请日：2007-07-12

    申请人： Fritz Pohl ,  Wolfgang Lorenz ,  Juergen Muennig ,  Bernd Pennemann ,  Gerhard Wiechers

    发明人： Fritz Pohl ,  Wolfgang Lorenz ,  Juergen Muennig ,  Bernd Pennemann ,  Gerhard Wiechers

    IPC分类号： C07C211/00

    CPC分类号： C07C201/08 ,  C07C205/06

    摘要： Dinitrotoluene is produced by nitration of toluene with nitrating acid (mixture of nitric acid and sulfuric acid) in which, in a first stage, the toluene is converted to mononitrotoluene (MNT) and then the mononitrotoluene is converted in a second stage to dinitrotoluene (DNT). Control of the weight ratio of the aqueous to organic phases, dispersion of the organic phase in the aqueous phase and use of less than 2.06 moles of nitric acid per mole of toluene are key features of this process.

    摘要翻译： 二硝基甲苯通过用硝酸（硝酸和硫酸的混合物）硝化甲苯来制备，其中在第一阶段将甲苯转化为一硝基甲苯（MNT），然后将一硝基甲苯转化为二硝基甲苯（DNT ）。 控制水相与有机相的重量比，有机相在水相中的分散和每摩尔甲苯使用小于2.06摩尔硝酸是该方法的关键特征。