Patent · US Active

Catalyst for the oxidation of o-xylene and/or naphthalene to phthalic anhydride

US9212157B2 · kind B2 · utility

0Cited by

12References

13Claims

0Family size

Assignee

BASF SE

Inventors

Stefan Altwasser · Monsheim, DE
Jürgen Zühlke · Speyer, DE
Frank Rosowski · Mannheim, DE
Michael Kramer · Muscatine, US

Key dates

Filing date	Jul 29, 2011
Grant date	Dec 15, 2015
Priority date	—
Expiry date	Feb 23, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J35/55
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a catalyst for the oxidation of o-xylene and/or naphthalene to phthalic anhydride, which has a plurality of catalyst zones which are arranged in series in the reaction tube and have been produced using an antimony trioxide which comprises a significant proportion of valentinite. The present invention further relates to a process for gas-phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst produced using an antimony trioxide which comprises a significant proportion of valentinite.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.