发明名称 |
Gas phase alkylation-liquid transalkylation process |
摘要 |
An alkylation/transalkylation process involving vapor phase alkylation of a benzene feedstock in a multi-stage alkylation zone having a plurality of series connected catalyst beds containing a pentasil aromatic alkylation catalyst, such as silicalite, coupled with intermediate separation and recirculation steps and liquid phase transalkylation over a transalkylation catalyst comprising a molecular sieve having a pore size greater than the pore size of the silicalite. The benzene containing feedstock is supplied to the multi-stage alkylation reaction zone along with a C2-C4 alkylating agent operated under temperature and pressure conditions to maintain the benzene in the gas phase. Alkylated product is recovered from the alkylation zone and supplied to a benzene recovery zone for the separation of the benzene from the alkylation product. Benzene from the benzene recovery zone is recycled to the reaction zone. A higher boiling bottom fraction containing a mixture of monoalkylated and polyalkylated aromatic components is supplied to a secondary separation zone from which a monoalkylated aromatic component, e.g. ethylbenzene, is recovered overhead with a heavier polyalkylated aromatic recovered as a bottom fraction. The bottom fraction may be applied to a tertiary separation zone.
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申请公布号 |
US5955642(A) |
申请公布日期 |
1999.09.21 |
申请号 |
US19960739564 |
申请日期 |
1996.10.30 |
申请人 |
FINA TECHNOLOGY, INC. |
发明人 |
MERRILL, JAMES T.;BUTLER, JAMES R. |
分类号 |
B01J29/06;C07B61/00;C07C2/66;C07C5/13;C07C5/27;C07C6/12;C07C9/22;C07C15/02;C07C15/073;(IPC1-7):C07C1/00;C07C2/64;C07C2/68;C07C5/22 |
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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