Storage material for sulfur oxides

US6338831B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Wolfgang Strehlau · Großkrotzenburg, DE
• Ulrich Göbel · Hattersheim, DE
• Rainer Domesle · Alzenau, DE
• Egbert Lox · Hanau, DE
• Thomas Kreuzer · Karben, DE

Key dates

• Filing date: Mar 26, 1999
• Grant date: Jan 15, 2002
• Expiry date: Mar 26, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J20/3236
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A sulfur oxide storage material contains a magnesium-aluminum spinel (MgO.Al2O3) and can be used as a so-called “sulfur trap” to remove sulfur oxides from oxygen-containing exhaust gases of industrial processes. In particular, it can be used for the catalytic purification of exhaust gas from internal-combustion engines to remove the sulfur oxides from the exhaust gas in order to protect the exhaust gas catalysts from sulfur poisoning. The material displays a molar ratio of magnesium oxide to aluminum oxide in the range of over 1.1:1, and the magnesium oxide present in stoichiometric excess is homogeneously distributed in a highly disperse form in the storage material.