Carbon-based catalyst useful in gas-solid reactions

US4992404A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Siegfried Gruhl
• Werner Pusch · Leverkusen, DE
• Siegbert Humberger · Odenthal, DE
• Goetz-Gerald Borger · Odenthal, DE

Key dates

• Filing date: Jan 25, 1990
• Grant date: Feb 12, 1991
• Expiry date: Jan 25, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/74
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A carbon-based catalyst which has a carbon content of >65% by weight and a content of substantially insoluble oxides of the metals Co, Fe, Ni, Cr, V, Mo, W, Cu, Mn and Ti of, in all, 0.1% by weight and a nitrogen content of 0.2 to 5% by weight. These catalysts are produced by a process wherein an organic material comprising unsaturated carbon-carbon bonds is pyrolyzed in a first step via the liquid phase stage, the product formed is size-reduced after cooling, mixed with substantially insoluble metal oxides and/or compounds forming substantially insoluble metal oxides together with binders and, optionally, water and the resulting mixture subjected to forming and heat treatment. The catalysts are useful in various gas-solid reactions more especially for the reductive destruction of nitrogen oxides in smoke gases.