- 专利标题： Methods for recovering activity of molecular sieve catalysts
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申请号： US11171886申请日： 2005-06-30
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公开(公告)号： US07550403B2公开(公告)日： 2009-06-23
- 发明人: John Q. Chen
- 申请人： John Q. Chen
- 申请人地址： US IL Des Plaines
- 专利权人： UOP LLC
- 当前专利权人： UOP LLC
- 当前专利权人地址： US IL Des Plaines
- 代理商 Mark Goldberg
- 主分类号： B01J38/06
- IPC分类号： B01J38/06 ; B01J38/48 ; B01J38/66
摘要：
The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst to make an olefin product from an oxygenate feed. In particular, the invention is directed to rejuvenating the catalyst by contacting it with warm water, ammonium salts, dilute acids or low pressure steam until the catalytic activity level of the catalyst has been increased to the desired extent.
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