Patent · US Active

Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates

US11512046B2 · kind B2 · utility

1Cited by

10References

9Claims

0Family size

Assignee

BASF SE

Inventors

Sven Titlbach · Heidelberg, DE
Andreas KUSCHEL · Heidelberg, DE
Carlos LIZANDARA · Ludwigshafen, DE
Stephan Schunk · Heidelberg, DE
Joerg ROTHER · Heidelberg, DE
Juergen Bechtel · Heidelberg, DE
Nedko Stefanov DREBOV · Ludwigshafen, DE
Stefan Maixner · Schwetzingen, DE
Matthias Hinrichs · Ludwigshafen, DE
Mohamed Halabi · Ludwigshafen am Rhein, DE
Imke Britta Mueller · Heidelberg, DE
Michaela Fenyn · Ludwigshafen am Rhein, DE

Key dates

Filing date	Apr 4, 2018
Grant date	Nov 29, 2022
Priority date	—
Expiry date	Aug 3, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C265/14
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a multi metallic material comprising one or more binary intermetallic phases of the general formula AxBy wherein: A is one or more element selected from Ni, Ru, Rh, Pd, Ir, Pt and Ag, B is one or more element selected from Sn, Sb, Pb, Zn, Ga, In, Ge and As, x is in the range 0.1-10, y in is in the range 0.1-10.

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