Title:
【発明の名称】O‐キシロール又はナフタリンからの無水フタル酸の製法
Document Type and Number:
Japanese Patent JPS6026790
Kind Code:
B2
Abstract:
A process for the manufacture of phthalic anhydride by oxidizing o-xylene and/or naphthalene over a supported catalyst containing vanadium pentoxide and titanium dioxide, at from 350 DEG to 500 DEG C, in which the o-xylene or naphthalene is passed, with an oxygen-containing carrier gas, over the catalyst, and in which the catalyst in the first 25-50 per cent by volume of the total catalyst volume, in the direction of flow of the mixture of o-xylene or naphthalene and carrier gas, contains from 0.01 to 0.3 per cent by weight, based on titanium dioxide, of rubidium, but no phosphorus, in the active composition, while the remainder of the catalyst contains from 0.02 to 0.8 per cent by weight, based on titanium dioxide, of phosphorus, but no rubidium, in the active composition.
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Inventors:
KURUTO BURETSUKUSHUMITSUTO
PEETAA ROITAA
FURIIDORITSUHI UIRUTO
PAURU HORUNBERUGAA
PEETAA ROITAA
FURIIDORITSUHI UIRUTO
PAURU HORUNBERUGAA
Application Number:
JP12347276A
Publication Date:
June 25, 1985
Filing Date:
October 16, 1976
Export Citation:
Assignee:
BASF AG
International Classes:
C07D307/89; B01J23/00; B01J27/00; C07C51/265; C07C51/31; (IPC1-7): C07D307/89
Attorney, Agent or Firm:
Masao Kobayashi