Title:
OXIDATION CATALYST AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPS63107744
Kind Code:
A
Abstract:
An oxidation catalyst formed from V205 and TiO2 of rutile structure is obtained by a process which comprises the following stages: a) preparation of a solution of Ti(IV) by dissolution (partial hydrolysis) of TiCl4 in an aqueous solution at a final pH below 1.0, b) preparation of a solution of V(IV) by heating, in order to dissolve it, solid V205 suspended in an aqueous oxalic acid solution, c) precipitation of metatitanic acid from the Ti(IV) solution at a pH not higher than 1.3, d) precipitation of vanadium oxide from the said V(IV) solution in the presence of the metatitanic acid obtained in (c), and e) separation of the precipitate, drying and calcination thereof at elevated temperature. This gives a catalyst formed from V205 and TiO2 of rutile structure, which has a specific surface area of the order of 10-60 m<2>/g, is highly active, selective and stable under conditions of catalytic oxidation, especially under the conditions of the oxidation of o-xylene to phthalic anhydride.
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Inventors:
RIVA ALFREDO (IT)
CAVANI FABRIZIO (IT)
CAVANI FABRIZIO (IT)
Application Number:
JP26153387A
Publication Date:
May 12, 1988
Filing Date:
October 16, 1987
Export Citation:
Assignee:
ALUSUISSE ITALIA SPA (IT)
International Classes:
B01J21/06; B01J23/22; B01J27/198; C07D307/33; B01J37/03; C01G23/053; C01G31/00; C07C51/265; C07D307/89; B01J35/10; (IPC1-7): B01J23/22; B01J27/198; C07D307/89
Attorney, Agent or Firm:
Sooo Suga
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