Patent · US Expired

Catalyst for the reduction of nitrogen oxides from waste gases and a process for its production

US5173466A · kind A · utility

4Cited by

3References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans-Hermann Heins · Leverkusen, DE
Peter Danz · Eelde, NL
Martin Ullrich · Leverkusen, DE
Hanno Henkel · Krefeld, DE
Klaus Holzer · Leverkusen, DE
Eberhard Zirngiebl
Siegfried Gruhl

Key dates

Filing date	Oct 2, 1991
Grant date	Dec 22, 1992
Priority date	—
Expiry date	Oct 2, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J37/08
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A carbon- and nitrogen-based catalyst consisting essentially of active carbon or active coke and comprising at least 90% by weight of graphite structures containing at least 10% of pores larger than 100 nm in diameter and having incorporated therein an isocyanate which forms C-N-ring structures, the percentage graphite content being at least 90% by weight. The catalayst is especially effective in the low temperature reduction of nitrogen oxides in waste gases.

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