Patent · US Active

Method for hydrogenating nitroaromatic systems with selected platinum catalysts

US9452970B2 · kind B2 · utility

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1References

14Claims

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Assignee

ALLESSA GMBH · DE

Inventors

Doris Neumann · Offenbach, DE
Joachim Ritzer · Rodenbach, DE

Key dates

Filing date	Sep 3, 2013
Grant date	Sep 27, 2016
Priority date	—
Expiry date	Sep 3, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/52
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method is described for the catalytic hydrogenation of aromatic nitro compounds with hydrogen to the corresponding amines in the presence of a supported catalyst comprising platinum. The method is characterized in that the catalyst comprising platinum has been modified with a tungsten compound and with a phosphorus compound in an oxidation state of <5. High yields and high selectivities are possible with the method.

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