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:
Dec. 29, 2020
Filed:
Dec. 07, 2016
Basf SE, Ledwigshafen am Rhein, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
A process for treating an HS- and CO-comprising fluid stream, in which a) the fluid stream is treated in a first absorber at a pressure of 10 to 150 bar with a first substream of a regenerated HS-selective absorbent to obtain a treated fluid stream and an HS-laden absorbent; b) the HS-laden absorbent is heated by indirect heat exchange with regenerated HS-selective absorbent; c) the heated HS-laden absorbent is decompressed to a pressure of 1.2 to 10 bar in a low-pressure decompression vessel to obtain a first CO-rich offgas and a partly regenerated absorbent; d) the partly regenerated absorbent is regenerated in a desorption column to obtain an HS-rich offgas and regenerated absorbent; e) the HS-rich offgas is fed to a Claus unit and the offgas from the Claus unit is fed to a hydrogenation unit to obtain hydrogenated Claus tail gas; f) the hydrogenated Claus tail gas and the first CO-rich offgas are treated in a second absorber at a pressure of 1 to 4 bar with a second substream of the regenerated HS-selective absorbent to obtain a second CO-rich offgas and a second HS-laden absorbent; and g) the second HS-laden absorbent is guided into the first absorber. Also described is a plant suitable for performance of the process. The process is notable for a low energy requirement.