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-alumnina ratio between 20 and 45.
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申请公布号 |
US6872866(B1) |
申请公布日期 |
2005.03.29 |
申请号 |
US20030736312 |
申请日期 |
2003.12.15 |
申请人 |
UOP LLC |
发明人 |
NEMETH LASZLO T.;MAHER GREGORY F. |
分类号 |
B01J29/06;C07C5/22;C07C5/27;(IPC1-7):C07C5/27 |
主分类号 |
B01J29/06 |
代理机构 |
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