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. 10, 2013
Filed:
Feb. 02, 2010
Hugo Rafael Garcia Andarcia, Mannheim, DE;
Ute Lichtfers, Karlsruhe, DE;
Georg Sieder, Bad Dürkheim, DE;
Oliver Spuhl, Mannheim, DE;
Steven Brughmans, Speyer, DE;
Hugo Rafael Garcia Andarcia, Mannheim, DE;
Ute Lichtfers, Karlsruhe, DE;
Georg Sieder, Bad Dürkheim, DE;
Oliver Spuhl, Mannheim, DE;
Steven Brughmans, Speyer, DE;
BASF SE, , DE;
Abstract
An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of A) at least one cyclic amine compound having solely tertiary amine groups and/or sterically hindered secondary amine groups and B) at least one cyclic amine compound having at least one sterically unhindered secondary amine group. The absorption medium comprises, e.g., an aqueous solution of A) 1-hydroxyethylpiperidine and/or triethylenediamine and B) piperazine. The absorption medium is particularly suitable for separating off carbon dioxide from flue gases and satisfies the following criteria: (i) sufficient capacity at low COpartial pressures; (ii) sufficiently rapid absorption rate at low COpartial pressures; (iii) stability toward oxygen; (iv) low vapor pressure for reducing solvent losses; and (v) low energy requirement for regeneration of the absorption medium.