Process for H/sub 2/S removal employing a regenerable polyalkanolamine adsorbent. [6 claims; Claus process]

Patent · Tue Jan 04 04:00:00 EST 1977

OSTI ID:7329359

Klein, J P; Setlur, S R; Groenendaal, W

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. 6 claims, 1 drawing figure.

• Assignee: Shell Oil Co.
• Patent Number(s): US 4001386
• OSTI ID: 7329359
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ALCOHOLS
AMINES
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
DESULFURIZATION
ELEMENTS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
REMOVAL
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR
SULFUR COMPOUNDS
SURFACE PROPERTIES
WASTES