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    Phosgene having low content of carbon tetrachloride
    15.
    发明授权
    Phosgene having low content of carbon tetrachloride 失效
    光气四氯化碳含量低

    公开(公告)号：US06930202B1

    公开(公告)日：2005-08-16

    申请号：US09807851

    申请日：1999-10-12

    申请人： Jürgen Heuser ,  Hermann Kauth ,  Christian Kords

    发明人： Jürgen Heuser ,  Hermann Kauth ,  Christian Kords

    IPC分类号： C01B32/80 ,  C08G64/22 ,  C07C51/58 ,  C07C67/02

    CPC分类号： C08G64/22 ,  C01B32/80

    摘要： A process for producing phosgene having low content of carbon tetrachloride is disclosed. The process entails reacting carbon monoxide with chlorine in the presence of elemental carbon, in a reactor. Critically the temperature of the gas stream emerging from the reactor is restricted to 30 to 80° C. and its pressure, measured directly downstream from said reactor is restricted to 120 to 400 kPaabs. The phosgene thus produced has a content of carbon tetrachloride that is less than 150 ppm.

    摘要翻译： 公开了一种生产低含量四氯化碳的光气的方法。 在反应器中，该过程需要在元素碳的存在下使一氧化碳与氯反应。 从反应器排出的气流的温度至关重要地限制在30至80℃，并且其直接从所述反应器下游测量的压力限制在120至400千帕绝对压力。 如此制得的光气的四氯化碳含量小于150ppm。

    Process for producing polycarbonates
    16.
    发明授权
    Process for producing polycarbonates 失效

    公开(公告)号：US06613868B2

    公开(公告)日：2003-09-02

    申请号：US10118362

    申请日：2002-04-08

    申请人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    发明人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    IPC分类号： C08G6400

    CPC分类号： C08G64/205 ,  C08G64/24

    摘要： A process for the production of polycarbonate is disclosed. The process, representing an improvement over the known interfacial polycondensation process entails introducing into the loop of a circulating reactor that additionally contains, a residence tank, an optional mixer, a pump, and a heat exchanger (i) an organic phase that contains a solvent for polycarbonate and phosgene and (ii) an aqueous phase that contains an aqueous lye solution, a dihydroxy compound and an optional monophenol to form an emulsion. Maintaining specified temperature and process conditions results in polycarbonate resin having good properties and in waste water that are characterized by their purity.

    Process for the preparation of polycarbonates
    18.
    发明授权
    Process for the preparation of polycarbonates 有权
    聚碳酸酯的制备方法

    公开(公告)号：US07071284B2

    公开(公告)日：2006-07-04

    申请号：US10751621

    申请日：2004-01-05

    申请人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    发明人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    IPC分类号： C08G64/00

    CPC分类号： C08G64/24 ,  C08G64/14

    摘要： An improvement in the continuous two-phase interfacial condensation process for preparing polycarbonate is disclosed. In the process that entails at least one diphenol, phosgene, at least one chain terminator, and optionally branching agents and is carried out in the presence of a catalyst the improvement comprising maintaining the concentration of the catalyst at a level of at least 0.012 mol per mol of diphenol.

    摘要翻译： 公开了用于制备聚碳酸酯的连续两相界面缩合方法的改进。 在需要至少一种二酚，光气，至少一种链终止剂和任选的支化剂的方法中，在催化剂存在下进行，其改进包括将催化剂的浓度维持在至少0.012mol / 摩尔二酚。