Process for catalytically reacting gases having a high sulfur dioxide content

摘要

Gases having a high sulfur dioxide content are reacted with oxygen to form sulfur trioxide in the presence of catalysts in contacting trays with interstage cooling between trays. The reaction gases are in flowing contact with catalyst bodies having a closed surface wherein the ratio of the contacted catalyst surface to the contacted catalyst volume is 120-400 meters<-> 1 and the residence time in each catalyst tray is 0.03- 0.5 second.