发明名称 |
LIQUID PHASE PROCESS FOR C8 ALKYLAROMATIC ISOMERIZATION |
摘要 |
A liquid or partially liquid phase process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene uses a zeolitic catalyst system preferably based on zeolite beta and on pentasil-type zeolite. The invention obtains an improved yield of para-xylene from the mixture relative to prior art processes in a more economical manner. A preferred beta zeolite is a surface-modified zeolite beta resulting from acid washing of a templated native zeolite at conditions insufficient to effect bulk dealumination. A preferred pentasil zeolite is a MTW-type with a silica-to-alumina ratio between 20 and 45. |
申请公布号 |
WO2005058778(A1) |
申请公布日期 |
2005.06.30 |
申请号 |
WO2004US41822 |
申请日期 |
2004.12.14 |
申请人 |
UOP LLC;NEMETH, LASZLO T.;MAHER, GREGORY F. |
发明人 |
NEMETH, LASZLO T.;MAHER, GREGORY F. |
分类号 |
B01J29/06;C07C5/22;C07C5/27 |
主分类号 |
B01J29/06 |
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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