Patent · US Active

Process and catalyst

US8242044B2 · kind B2 · utility

0Cited by

4References

14Claims

0Family size

Assignee

ASTRAZENECA AB · SE

Inventors

Wilhelm Quittman · Visp, CH
Thomas Belser · Visp, CH
Rhony Aufdenblatten · Visp, CH

Key dates

Filing date	Sep 22, 2010
Grant date	Aug 14, 2012
Priority date	—
Expiry date	Feb 11, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D239/47
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Aromatic or heteroaromatic nitro compounds are catalytically hydrogenated to the corresponding amines in the presence of a platinum catalyst comprising elemental platinum on a support; the platinum catalyst is modified with a molybdenum compound and a phosphorus compound wherein the phosphorus has an oxidation state of less than +5, e.g. hypophosphorous acid; the catalyst is particularly useful in the hydrogenation of nitro compounds with halogen and/or sulfur-containing substituents.

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