发明名称 |
CRITICAL PHASE ALKYLATION PROCESS |
摘要 |
A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst. An aromatic feedstock having a benzene content of at least 90 wt.% is supplied into a reaction zone into contact with a zeolite beta alkylation catalyst having a silica/alumina ratio within the range of 20-500, specifically 50150. The alkylation catalyst is a zeolite beta specifically a lanthanum-modified zeolite beta. Ethylene is supplied to the reaction zone to provide a benzene/ethylene mole ratio of 1-15. The reaction zone is operated under conditions in which benzene is in the supercritical phase to produce an alkylation product containing ethylbenzene as a primary product with heavier alkylated by-products of no more than 60 wt.% of the ethylbenzene. The alkylation product is recovered from the reaction zone and supplied to a separation and recovery zone to separate ethylbenzene from a polyalkylated component including diethylbenzene. At least a portion of the polyalkylated component is supplied to a transalkylation reaction zone containing a molecular sieve transalkylation catalyst. The transalkylation reaction zone contains a zeolite Y catalyst and is operated under liquid phase conditions. |
申请公布号 |
WO2004033394(A2) |
申请公布日期 |
2004.04.22 |
申请号 |
WO2003US30400 |
申请日期 |
2003.09.25 |
申请人 |
FINA TECHNOLOGY, INC. |
发明人 |
BUTLER, JAMES, R.;KELLY, KEVIN, P. |
分类号 |
C07C2/66;C07C6/12 |
主分类号 |
C07C2/66 |
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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