发明名称 |
PROCESS FOR THE PREPARATION OF ACROLEIN AND ACRYLIC ACID |
摘要 |
<p>The present invention concerns a method for producing acrolein and acrylic acid by carrying out vapor phase catalytic oxidation of propylene with molecular oxygen or a gas containing molecular oxygen using a oxidation catalysts comprising Mo, Bi and Fe as an essentially element and a fixed bed multitubular reactor, which comprises a) using a plurality of supported catalysts having different activities, which was obrtained, for example, by different calcination method in the production process of the supported catalysts, b) setting a catalyst layer in a reaction tube, which is formed by dividing it into plural portions in the tube axial direction, and c) arranging the aforementioned plural supported catalysts in such order that the activity becomes high toward the outlet from the inlet of the material gas in the reaction tube axial direction. According to the present invention, the generation of hot spot can be avoided and over oxidation reaction can be avoided and the acrolein and acrylic acid are produced constantly for a prolonged period of time.</p> |
申请公布号 |
EP0900774(A1) |
申请公布日期 |
1999.03.10 |
申请号 |
EP19970913495 |
申请日期 |
1997.12.02 |
申请人 |
NIPPON KAYAKU KABUSHIKI KAISHA |
发明人 |
WADA, KOICHI;SEO, YOSHIMASA;IWAMOTO, AKIRA;SUDO, ATSUSHI;SAKAI, FUMIO;SHIRAISHI, KAZUO;NOWATARI, HIROYOSHI |
分类号 |
B01J23/88;B01J8/06;B01J23/31;B01J23/887;C07B61/00;C07C27/14;C07C45/35;C07C47/22;C07C51/25;C07C57/05;(IPC1-7):C07C27/14;B01J27/192 |
主分类号 |
B01J23/88 |
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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