公开(公告)号：US10173211B2

公开(公告)日：2019-01-08

申请号：US14882587

申请日：2015-10-14

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yuewei Ji ,  Mark A. Deimund ,  Yashodhan Bhawe ,  Mark E. Davis

IPC: B01J29/06 ,  B01J37/10 ,  C07C1/20 ,  C01B39/02 ,  B01J29/70 ,  B01J29/08 ,  B01J35/10

Abstract: The present invention is directed to methods of enhancing the catalytic activities of 8-MR zeolites, the methods comprising treating a precursor 8-MR zeolite that has been prepared without the use of an organic structure directing agent and having an Si/Al ratio of less than 5, with high temperature steam for a period of time sufficient to extract at least a portion of the aluminum from the precursor zeolite framework to form a steam-treated zeolite having an Si/tetrahedral Al ratio of greater than 5, wherein the steam has a temperature in a range of from about 350° C. to about 850° C. The compositions produced by these methods and their use in catalytic reactions are also provided.