公开(公告)号：US10226319B2

公开(公告)日：2019-03-12

申请号：US15882353

申请日：2018-01-29

Applicant: ExxonMobil Research and Engineering Company

Inventor： Allen W. Burton ,  Karl G. Strohmaier ,  Scott J. Weigel

IPC: C01B39/48 ,  B01J29/70 ,  A61F2/00 ,  C01B39/02 ,  B01J37/10 ,  B01J37/30 ,  B01D53/04 ,  B01D53/75 ,  B01D53/86 ,  F01N3/08 ,  C01B39/04 ,  B01D53/92 ,  B01D53/94 ,  A61B17/06 ,  A61B17/34 ,  B01J29/03 ,  A61B17/04 ,  A61B17/00 ,  A61B17/32

Abstract: A method for reducing the level of occluded alkali metal cations from an MSE-framework type molecular sieve comprises either (a) contacting the molecular sieve with a solution containing ammonium ions at a temperature of at least about 50° C. to ammonium-exchange at least part of the occluded potassium ions or (b) contacting the molecular sieve with steam at a temperature of at least about 300° C. and then subjecting the steamed molecular sieve to ammonium exchange.