Process for H.sub.2 S removal employing a regenerable polyalkano

Details Process for H.sub.2 S removal employing a regenerable polyalkano Process for H.sub.2 S removal employing a regenerable polyalkano

1976-01-16

1977-01-04

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C01B 1700

Patent

active

040013863

ABSTRACT:
An improved process is described for reducing the total sulfur content of off-gases from a Claus process by catalytically converting the sulfur compounds contained in the off-gases to hydrogen sulfide and selectively absorbing the hydrogen sulfide with a regenerable polyalkanolamine adsorbent solution; the hydrogen sulfide enriched adsorbent being regenerated and used again for further adsorption of hydrogen sulfide and the hydrogen sulfide-rich gas mixture liberated in regeneration being passed to a Claus process. This improved process is characterized in that the hydrogen sulfide enriched polyalkanolamine solution from adsorption of the reduced Claus off-gases is further enriched in hydrogen sulfide content prior to regeneration by contacting it with a stream which contains hydrogen sulfide at a higher partial pressure than that of the reduced Claus off-gases.

REFERENCES:
patent: 2834653 (1958-05-01), Fleming et al.
patent: 3752877 (1973-08-01), Beavon
patent: 3845071 (1974-11-01), Groenendaal
patent: 3947547 (1976-03-01), Groenendaal

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