发明授权
- 专利标题： Multiple impregnation technique for the preparation of ex situ selectivated zeolite catalysts
- 专利标题（中）： 用于制备异位选择性沸石催化剂的多重浸渍技术
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申请号： US69255申请日： 1993-05-28
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公开(公告)号： US5403800A公开(公告)日： 1995-04-04
- 发明人: Jeffrey S. Beck , Sharon B. McCullen , David H. Olson
- 申请人： Jeffrey S. Beck , Sharon B. McCullen , David H. Olson
- 申请人地址： VA Fairfax
- 专利权人： Mobil Oil Corp.
- 当前专利权人： Mobil Oil Corp.
- 当前专利权人地址： VA Fairfax
- 主分类号： B01J29/40
- IPC分类号： B01J29/40 ; B01J37/08 ; C07C6/12 ; B01J29/04 ; B01J37/02
摘要：
A ex situ selectivated catalytic molecular sieve for enhanced shape selective hydrocarbon conversions in which a catalytic molecular sieve is modified by being exposed to at least two selectivation sequences, each sequence including an impregnation of the molecular sieve with a selectivating agent and a subsequent calcination of the impregnated molecular sieve. The ex situ selectivation method is also described, including the use of aqueous carriers for the selecting agent. Also a method for in situ trim-selectivating the modified catalytic molecular sieve. Also, a method for moderate steaming of the selectivated molecular sieve. Also a method for in situ trim-selectivating the modified catalytic molecular sieve. Also described is the process for shape selective hydrocarbon conversion comprising contacting a hydrocarbon feedstream under conversion conditions with the selectivated molecular sieve.