Process for the preparation of isocyanates
    5.
    发明授权
    Process for the preparation of isocyanates 有权
    异氰酸酯的制备方法

    公开(公告)号:US08563768B2

    公开(公告)日:2013-10-22

    申请号:US13382615

    申请日:2010-06-26

    IPC分类号: C07C263/10

    摘要: An isocyanate is produced by reacting an amine with a stoichiometric excess of phosgene in the gas phase. This reaction is carried out at a temperature above the amine's boiling point to obtain a liquid stream containing the isocyanate and a gas stream containing hydrogen chloride and phosgene. The gas stream containing hydrogen chloride and phosgene thus produced is separated into a gas stream containing hydrogen chloride and a liquid stream containing phosgene. At least part of the liquid stream containing phosgene is then converted to a gas stream containing phosgene which gas stream is then recycled. The gaseous phosgene stream is maintained at a higher pressure than the liquid phosgene stream.

    摘要翻译: 通过在气相中使胺与化学计量过量的光气反应来制备异氰酸酯。 该反应在高于胺沸点的温度下进行,得到含有异氰酸酯和含有氯化氢和光气的气流的液体流。 将由此产生的含有氯化氢和光气的气流分离成含有氯化氢的气流和含有光气的液体流。 然后将含有光气的液体物流的至少一部分转化成含有光气的气流,然后将气流再循环。 气态光气流保持在比液体光气流更高的压力下。

    PROCESS FOR THE PREPARATION OF ISOCYANATES
    6.
    发明申请
    PROCESS FOR THE PREPARATION OF ISOCYANATES 有权
    制备异氰酸酯的方法

    公开(公告)号:US20120123152A1

    公开(公告)日:2012-05-17

    申请号:US13382615

    申请日:2010-06-26

    IPC分类号: C07C263/10

    摘要: An isocyanate is produced by reacting an amine with a stoichiometric excess of phosgene in the gas phase. This reaction is carried out at a temperature above the amine's boiling point to obtain a liquid stream containing the isocyanate and a gas stream containing hydrogen chloride and phosgene. The gas stream containing hydrogen chloride and phosgene thus produced is separated into a gas stream containing hydrogen chloride and a liquid stream containing phosgene. At least part of the liquid stream containing phosgene is then converted to a gas stream containing phosgene which gas stream is then recycled. The gaseous phosgene stream is maintained at a higher pressure than the liquid phosgene stream.

    摘要翻译: 通过在气相中使胺与化学计量过量的光气反应来制备异氰酸酯。 该反应在高于胺沸点的温度下进行,得到含有异氰酸酯和含有氯化氢和光气的气流的液体流。 将由此产生的含有氯化氢和光气的气流分离成含有氯化氢的气流和含有光气的液体流。 然后将含有光气的液体物流的至少一部分转化成含有光气的气流,然后将气流再循环。 气态光气流保持在比液体光气流更高的压力下。