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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.:

US 11760632 B1

PDFFull Text
Date of Patent:
Sep. 19, 2023

Filed:

Dec. 28, 2019

Regeneration schemes for a two-stage adsorption process for claus tail gas treatment

Applicant:

Saudi Arabian Oil Company, Dhahran, SA;

Inventors:

Georgios Lithoxoos, Dhahran, SA;

Yuguo Wang, Dhahran, SA;

Rashid M. Othman, Dhahran, SA;

Ismail A. Alami, Dammam, SA;

John P. O'Connell, Dhahran, SA;

Sebastien A. Duval, Dhahran, SA;

Assignee:

Saudi Arabian Oil Company, Dhahran, SA;

Attorneys:

Bracewell LLP

Constance G. Rhebergen

Eleanor L. Tyson

Primary Examiner:

Timothy C Vanoy

Int. Cl.
CPC ...
C01B 17/04 (2006.01); B01D 53/26 (2006.01); B01D 53/52 (2006.01); B01D 53/75 (2006.01); B01D 51/10 (2006.01);
U.S. Cl.
CPC ...
C01B 17/0404 (2013.01); B01D 51/10 (2013.01); B01D 53/261 (2013.01); B01D 53/52 (2013.01); B01D 53/75 (2013.01); B01D 2253/108 (2013.01);
Abstract

Embodiments of the disclosure provide a method and system for sulfur recovery. A Claus tail gas stream is fed to a hydrogenation reactor to produce a hydrogenated gas stream. The hydrogenated gas stream is fed to a quench tower to produce a quenched gas stream. The quenched gas stream is fed to a first stage adsorption vessel of first stage adsorption unit to produce a first outlet gas stream. The first outlet gas stream is fed to a second stage adsorption vessel of a second stage adsorption unit to produce a second byproduct gas stream. The first stage adsorption vessel is regenerated to produce a first byproduct gas stream. The second stage adsorption vessel is regenerated to produce a second outlet gas stream including hydrogen sulfide. Optionally, a portion of the second byproduct gas stream or nitrogen can be fed to the first stage adsorption vessel or the second stage adsorption vessel for regeneration. Optionally, a sales gas can be fed to the second stage adsorption vessel for regeneration. Optionally, vacuum can be applied to the first stage adsorption vessel or the second stage adsorption vessel for regeneration.

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