Title:
無水フタル酸を製造するための触媒ならびに方法
Document Type and Number:
Japanese Patent JP2008540124
Kind Code:
A
Abstract:
The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO2, characterized in that at least a portion of the TiO2 used has the following properties: (a) the BET surface area is more than 15 m2/g, (b) at least 25% of the total pore volume is formed by pores having a radius between 60 and 400 nm, and (c) the primary crystal size is more than 22 ångstrøm. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.
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Inventors:
Estenfelder, Malvin
Hertzberger, Helmut
Gweckel, Christian
Hertzberger, Helmut
Gweckel, Christian
Application Number:
JP2008512691A
Publication Date:
November 20, 2008
Filing Date:
November 28, 2005
Export Citation:
Assignee:
Sued-Chemie AG
International Classes:
B01J27/198; B01J23/22; B01J35/00; B01J35/02; B01J35/10; C07D307/89; C07B61/00
Domestic Patent References:
| JPH05239047A | 1993-09-17 | |||
| JP2001255691A | 2001-09-21 | |||
| JPS56161839A | 1981-12-12 |
Foreign References:
| WO2005030388A1 | 2005-04-07 |
Attorney, Agent or Firm:
Haruo Hamada