发明名称 |
Method for preparing p-isobutylstyrene. |
摘要 |
<p>A method for preparing high-purity p-isobutylstyrene is here disclosed which comprises in a first step reacting o- and/or m-isobutylethylbenzene, optionally, together with isobutylbenzene, in the presence of an acid catalyst in a liquid phase at a reaction temperature of -10 to 600 DEG C so that the production of sec-butylethylbenzene in butylethylbenzene may not exceed 20% by weight, in order to form a mixture of p-isobutylethylbenzene and sec-butylethylbenzene; and in a second step bringing the mixture of p-isobutylethylbenzene and sec-butylethylbenzene recovered from the first step into contact with a dehydrogenation metal catalyst containing at least one metal selected from the groups Ib, IIb, VIa, VIIa and VIII of the periodic table at a reaction temperature of 300 to 650 DEG C under a reaction pressure of 50 bar (kg/cm<2>) or less in a gaseous phase.</p> |
申请公布号 |
EP0373362(A1) |
申请公布日期 |
1990.06.20 |
申请号 |
EP19890120734 |
申请日期 |
1989.11.08 |
申请人 |
NIPPON PETROCHEMICALS COMPANY, LIMITED |
发明人 |
SHIMIZU, ISOO;MATSUMURA, YASUO;TOKUMOTO, YUICHI;UCHIDA, KAZUMICHI |
分类号 |
C07C15/02;C07B61/00;C07C5/27;C07C5/333;C07C7/04;C07C7/148;C07C15/46 |
主分类号 |
C07C15/02 |
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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