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
AssigneeDidier Engineering GmbH
InventorsHartmut K. Bauer, Ernst A. W. Otte
Life of this patent
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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.
Claims11
In a process for separating acid components from gases in multiple stages by ammonia recirculation scrubbing wherein the ammonia bound to the acid components during scrubbing is released by a deacidification step to produce an ammonia condensate, the improvement comprising the steps of:
- stripping said ammonia condensate to produce substantially pure liquid ammonia, and
- recirculating said liquid ammonia to at least one stage of the scrubbing process.
Dependencies are inferred from the claim text.