Patent · US Expired

Preparation of aromatic nitriles

US4814479A · kind A · utility

6Cited by

4References

5Claims

0Family size

Assignee

BASF SE

Inventors

Heinz Engelbach
Roland Krokoszinski · Bad Dürkheim, DE
Wolfgang Franzischka · Bischofswerda, DE
Martin Decker · Ludwigshafen, DE

Key dates

Filing date	Nov 13, 1986
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Nov 13, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C253/28
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Aromatic nitriles, in particular phthalodinitriles, are prepared from an appropriately alkyl-substituted aromatic hydrocarbon by catalytic oxidation with oxygen or an oxygen-containing gas in the presence of ammonia at elevated temperatures in the vapor phase, in the presence of a catalyst which contains from 2 to 10% by weight of vanadium(V) oxide, from 1 to 10% by weight of antimony(III) oxide, from 0.02 to 2% by weight of an alkali metal oxide and alumina, by a process in which from 0.01 to 1.0% by weight of an alkaline earth metal, or of a compound of an alkaline earth metal, in particular barium or a barium compound, is added to the catalyst.

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