Patent · US Expired

Catalyst for removing nitrogen oxides from a waste gas, and process for the production of the catalyst

US5391530A · kind A · utility

6Cited by

2References

9Claims

0Family size

Assignee

Huels Aktiengesellschaft - PB15 · DE

Inventors

Bernd Nowitzki · Marl, DE
Jurgen Jung · Neunkirchen, DE
Helmut Kretschmer · Waldaschaff, DE

Key dates

Filing date	Jul 20, 1993
Grant date	Feb 21, 1995
Priority date	—
Expiry date	Jul 20, 2013

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J37/0215
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a process for the production of a catalyst for the removal of nitrogen oxides from waste gases, in which the end of the catalyst on the gas-inlet side is coated with a compound selected from the group consisting of biphosphates, condensed phosphates, silicates, borates and mixtures thereof, and is subjected to thermal aftertreatment, where the end of the green element on the gas-inlet side is immersed into an aqueous preparation comprising biphosphates and/or condensed phosphates and/or silicates and/or borates, and the green element is subsequently calcined at temperatures of from 300.degree. to 700.degree. C.

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