发明名称 |
Preparation of phthalic anhydride |
摘要 |
Process for preparing phthalic anhydride by gas-phase oxidation of xylene, naphthalene or mixtures thereof in a shell-and-tube reactor thermostatted by means of a heat transfer medium over three or more different fixed-bed catalysts arranged in zones, wherein the process is carried out so that the maximum temperature in the second catalyst zone in the flow direction is up to 50° C. lower than the maximum temperature in the first catalyst zone and the maximum temperature in the third zone from the gas inlet is from 30 to 100° C. lower than that in the first catalyst zone. The process of the present invention makes it possible to prepare phthalic anhydride in high yields under industrially relevant conditions.
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申请公布号 |
US2005148782(A1) |
申请公布日期 |
2005.07.07 |
申请号 |
US20040503983 |
申请日期 |
2004.08.10 |
申请人 |
STORCK SEBASTIAN;ROSOWSKI FRANK;BAIER MICHAEL;TENTEN ANDREAS;WOLF HANS-JOSEF |
发明人 |
STORCK SEBASTIAN;ROSOWSKI FRANK;BAIER MICHAEL;TENTEN ANDREAS;WOLF HANS-JOSEF |
分类号 |
C07D307/89;B01J23/22;B01J35/00;C07B61/00;C07C51/265;C07C51/31;(IPC1-7):C07D307/89 |
主分类号 |
C07D307/89 |
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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