发明名称 |
High temperature calcination of selectivated molecular sieve catalysts for activity and diffusional modification |
摘要 |
A method is disclosed for modifying a catalytic molecular sieve for shape-selective hydrocarbon conversions comprises: a) selectivating said catalytic molecular sieve by contacting with a silicon-containing selectivating agent; and b) calcining the selectivated catalytic molecular sieve at high temperature calcination conditions comprising temperatures greater than 700° C., which conditions are sufficient to reduce acid activity as measured by alpha value and increase diffusion barrier of said catalytic molecular sieve as measured by the rate of 2,3-dimethylbutane uptake, as compared to the selectivated catalyst. Catalytic molecular sieves thus prepared, such as silica-bound ZSM-5, and their use in hydrocarbon conversion processes such as aromatics isomerization, e.g., xylene isomerization, ethylbenzene conversion and aromatics disproportionation, e.g., toluene disproportionation are also disclosed. |
申请公布号 |
ZA200600568(B) |
申请公布日期 |
2008.12.31 |
申请号 |
ZA20060000568 |
申请日期 |
2006.01.19 |
申请人 |
EXXONMOBIL CHEMICAL PATENTS INC. |
发明人 |
BECK, JEFFREY, SCOTT;BORGHARD, WILLIAM, STERN;CHESTER, ARTHUR, WARREN;KENNEDY, CARRIE, L.;STERN, DAVID, LAWRENCE |
分类号 |
B01J;B01J29/04;B01J29/06;B01J29/40;B01J29/44;B01J37/08;C07C;C07C5/27;C07C6/12;C10G11/05;C10G29/20;C10G45/64 |
主分类号 |
B01J |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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