The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1977
Filed:
Jan. 16, 1976
Johannes P Klein, The Hague, NL;
Swethadrivas R Setlur, New Delhi, IN;
Willem Groenendaal, The Hague, NL;
Shell Oil Company, Houston, TX (US);
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.