Method of treating vapors containing ammonia and hydrogen sulfide

US5672326A · kind A · utility

Assignee

• Krupp Koppers GmbH · DE

Inventors

• Hans-Peter Minak · Freiberg, DE
• Manfred Gross · Gladbeck, DE

Key dates

• Filing date: Dec 5, 1995
• Grant date: Sep 30, 1997
• Expiry date: Dec 5, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/8634
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Ammonia and 5 to 40 volume percent hydrogen sulfide containing vapors which arise in the vaporization of process water from hydrogenation or a crude oil fraction or in gas treatment in a coking plant, can be subjected in a cracking catalyst reactor to breakdown of the ammonia to nitrogen and hydrogen. The resulting process gas is cooled to 250.degree. to 350.degree. C. and is fed to a hydrogenation reactor where any sulfur is hydrogenated to the hydrogen sulfide. The process gas can then be subjected to further treatment without the danger of sulfur blockage of the process lines. For example, the hydrogen sulfide can be removed by a selective absorption process.