公开(公告)号：US5811628A

公开(公告)日：1998-09-22

申请号：US504628

申请日：1995-07-20

申请人： Klaus Weber ,  Rainer Schoedel ,  Peter Birke ,  Reinhard Geyer ,  Ulrich Neumann ,  Werner Haertwig ,  Gerhard Vogel ,  Willi Sattelmayer ,  Rudolf Schumann ,  Anette Hoppe

发明人： Klaus Weber ,  Rainer Schoedel ,  Peter Birke ,  Reinhard Geyer ,  Ulrich Neumann ,  Werner Haertwig ,  Gerhard Vogel ,  Willi Sattelmayer ,  Rudolf Schumann ,  Anette Hoppe

IPC分类号： A62D3/00 ,  B01D53/86 ,  B01J23/96 ,  B01J38/10 ,  B01J38/12 ,  C07C1/26 ,  B01J20/34

CPC分类号： B01J38/12 ,  B01D53/8662 ,  B01J23/96 ,  B01J38/10

摘要： A method for the hydrodechlorination of a reaction gas primarily composed of chlorinated hydrocarbons is carried out sequentially. A first step is advantageously carried out in a tubular reactor filled with catalyst and cooled externally, to maintain a temperature within a preferred range of 80.degree. to 230.degree. C. and a radial temperature difference of not more than 40.degree. C. Hydrogen is added to the tubular reactor with a hydrogen excess in a preferred range of 1.1 to 1.5 relative to the reaction gas, based on the stoichiometric consumption. The catalyst is present in a catalyst loading in a preferred range of 0.1 to 1.5 v/vh based on the volume of reaction gas. A fixed bed reactor is advantageously used for a second step, optimally connected in straight transit with the output of the reactor of the first step. The full-space reactor is maintained at a temperature within a preferred range of 200.degree. to 300.degree. C. and a hydrogen excess relative to the stoichiometric consumption is in a preferred range of 2 to 100. Catalyst is present in a preferred amount related to a volume of catalyst in step one according to a ratio in a range of 2:1 to 10:1. The dechlorination is preferably carried out at pressures between 1 and 50 bar. A method is further provided for regenerating deactivated catalysts without accumulation of dioxin in the waste gas, achieved by a reducing treatment, followed by an oxidizing treatment at a temperature at or above the last operating temperature of the catalyst.

摘要翻译： 依次进行主要由氯代烃组成的反应气体的加氢脱氯的方法。 第一步有利地在填充有催化剂的管式反应器中进行并在外部冷却，以将温度保持在80℃至230℃的优选范围和不超过40℃的径向温度差。加入氢气 基于化学计量消耗，相对于反应气体，相对于反应气体，优选范围为1.1〜1.5的氢过渡到管式反应器。 基于反应气体的体积，催化剂以0.1至1.5v / vh的优选范围存在于催化剂负载中。 固定床反应器有利地用于第二步骤，最佳地连续地与第一步骤的反应器的输出相连。 全空间反应器保持在200℃至300℃的优选范围内的温度，相对于化学计量消耗的氢过量在优选的范围为2至100.催化剂以优选的量存在 根据比例在2:1至10:1的范围内的步骤1中的催化剂体积。 脱氯优选在1至50巴之间的压力下进行。 还提供一种方法，用于再生失活的催化剂，而不会在废气中积聚二恶英，通过还原处理实现，然后在等于或高于催化剂的最后操作温度的温度下进行氧化处理。