Process for separating, especially in multiple stages, acid components such as CO.sub.2, HCN and specifically H.sub.2 S, from gases, especially from coke oven gases, by means of ammonia recirculation scrubbing

US4477420A · kind A · utility

Assignee

• Didier Engineering GmbH · DE

Inventors

• Hartmut Bauer · Neheim, DE
• Ernst A. W. Otte

Key dates

• Filing date: Jul 21, 1982
• Grant date: Oct 16, 1984
• Expiry date: Jul 21, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10K1/121
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process of separating in multiple stages acid components in coke oven gas such as CO.sub.2, HCN and particularly H.sub.2 S by ammonia scrubbing wherein the ammonia used in scrubbing is deacidified to remove the acid components and is recirculated to the scrubbing process at least in part as substantially pure liquid ammonia.