Patent · US Active

Process for preparing aromatic amines

US9139510B2 · kind B2 · utility

1Cited by

1References

6Claims

0Family size

Assignee

Bayer Intellectual Property GmbH · DE

Inventors

Michael Merkel · Hof, DE
Karl-Heinz Wilke · Moers, DE
Peter Lehner · Baytown, US
Andre Lago · Hamburg, DE
Erwin Dieterich · Cologne, DE

Key dates

Filing date	Jan 6, 2012
Grant date	Sep 22, 2015
Priority date	—
Expiry date	Mar 14, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/36
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the continuous preparation of aromatic amines by hydrogenation of the corresponding nitroaromatics in the presence of catalysts arranged in reaction spaces, in which an adiabatically operated reaction space RA is connected downstream of an isothermally operated reaction space RI and RA additionally also has a separate feed for the nitroaromatic to be hydrogenated, RI is fed with the nitroaromatic to be hydrogenated from the start to the end of the hydrogenation, and the product mixture emerging from RI is fed into RA from the start to the end of the hydrogenation, wherein RA can additionally be fed via the separate feed with the nitroaromatic to be hydrogenated.

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