Invention Grant
US08802912B2 Effect of wet reduction on catalyst stability and methods of maintaining catalyst stability 有权
湿法还原对催化剂稳定性的影响以及保持催化剂稳定性的方法

  • Patent Title: Effect of wet reduction on catalyst stability and methods of maintaining catalyst stability
  • Patent Title (中): 湿法还原对催化剂稳定性的影响以及保持催化剂稳定性的方法
  • Application No.: US12489609
    Application Date: 2009-06-23
  • Publication No.: US08802912B2
    Publication Date: 2014-08-12
  • Inventor: Jeffery PieperWei PanDean RendeGary Malott
  • Applicant: Jeffery PieperWei PanDean RendeGary Malott
  • Applicant Address: US IL Des Plaines
  • Assignee: UOP LLC
  • Current Assignee: UOP LLC
  • Current Assignee Address: US IL Des Plaines
  • Agent Arthur E Gooding
  • Main IPC: C07C5/333
  • IPC: C07C5/333
Effect of wet reduction on catalyst stability and methods of maintaining catalyst stability
Abstract:
The present invention provides a method of increasing stability of a catalyst used in a dehydrogenation process. The method includes storing fresh catalyst in a reduction zone, passing a gas through the reduction zone, introducing hydrocarbons and hydrogen gas into a reactor positioned downstream from the reduction zone to facilitate a dehydrogenation reaction, and replenishing spent catalyst in the reactor with fresh catalyst from the reduction zone. The gas has a moisture content at or below about 4000 ppmv and a temperature at or below about 290° C. The reactor includes catalyst for increasing the rate of the dehydrogenation reaction. The moisture content of the gas may be reduced to at or below about 4000 ppmv by passing the gas through a drier or by using an inert gas stream. The temperature of the gas may also be reduced.
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