Patent · US Expired

Process for the isomerization of o-, m- and/or p-toluidine

US4720583A · kind A · utility

0Cited by

2References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Klaus Eichler · Laufenburg (Baden), DE
Ernst I. Leupold · Neu-Anspach, DE
Hans-Jurgen Arpe
Herbert Baltes · Losheim, DE

Key dates

Filing date	May 31, 1985
Grant date	Jan 19, 1988
Priority date	—
Expiry date	May 31, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/68
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the isomerization of o-, m- or p-toluidine, or of a mixture of them, on a zirconium-containing zeolite catalyst of the pentasil type. Catalysts of this type are distinguished by particularly high activity and a long useful life. The invention particularly relates to the preparation of m-toluidine by isomerization of o- and/or p-toluidine on zirconium-containing zeolite catalysts of the pentasil type.

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