Invention Grant
US08748333B2 Surface-modified zeolites and methods for preparing the same 有权
表面改性沸石及其制备方法

  • Patent Title: Surface-modified zeolites and methods for preparing the same
  • Patent Title (中): 表面改性沸石及其制备方法
  • Application No.: US13938634
    Application Date: 2013-07-10
  • Publication No.: US08748333B2
    Publication Date: 2014-06-10
  • Inventor: Laszlo T. NemethFeng Xu
  • Applicant: UOP LLC
  • Applicant Address: US IL Des Plaines
  • Assignee: UOP LLC
  • Current Assignee: UOP LLC
  • Current Assignee Address: US IL Des Plaines
  • Agent Mark Goldberg
  • Main IPC: B01J29/06
  • IPC: B01J29/06
Surface-modified zeolites and methods for preparing the same
Abstract:
Surface-modified zeolites and methods for preparing surface-modified zeolites are provided. A hybrid polymer formed from a silicon alkoxide and a metal alkoxide, a co-monomer, or both, is contacted with a zeolite suspension. The zeolite suspension comprises a sodium-, an ammonium-, or a hydrogen-form zeolite and a solvent. The hybrid polymer and zeolite suspension are contacted under conditions sufficient to deposit hybrid polymer on external surfaces of the zeolite to form a treated zeolite. Solvent is removed therefrom. The treated zeolite is dried and calcinated to form a dried and calcinated treated zeolite. Forming of the zeolite suspension and the contacting, removing, drying, and calcinating steps are provided in one selectivation sequence to produce a surface-modified zeolite from the ammonium-form zeolite and the hydrogen-form zeolite. If the dried and calcinated treated zeolite is a sodium-form zeolite, the sodium is exchanged with ammonium and then additionally dried and calcinated.
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